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    International Journal of Advanced Design and Manufacturing Technology ( Scientific )
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  • About the journal

    International Journal of Advanced Design and Manufacturing Technology (ADMT), is an open access double-blind peer reviewed publication which is published by Islamic Azad University Isfahan Branch concerned with new concepts and findings in areas related to mechanical engineering, either empirical or theoretical . The ADMT is a quarterly publication, which publishes original research papers in journal scopes.  This journal is following of Committee on Publication Ethics (COPE) and complies with the highest ethical standards in accordance with ethical laws. All submitted manuscripts are checked for similarity through a trustworthy software named iThenticate to be assured about its originality and then rigorously peer-reviewed by the international expert reviewers (Read More...).


     Journal of Advanced Design and Manufacturing Technology (ADMT) is indexed in ProQuest, Ebsco, ISC, COPERNICUS, Google Scholar, J-gate, SID, Sherpa Romeo, EZB(Electronic Journal Library)  and Researchbib. 


             

    Recent Articles

    • Open Access Article

      1 - Investigation of Compressive Stresses of Stainless Steel 316L Diamond Lattice Structures Under the Effect of Spherical Connections Produced by SLM Additive Manufacturing
      Behnam Ahmadi Roozbahani AliAkbar Lotfi Neyestanak
      Issue 4 , Vol. 16 , Autumn 2023
      In this study, the compressive stresses of dodecahedron diamond lattice structures have been investigated. The finite element method has been used for Stress analysis. After the simulation, it was found that more stresses are applied at the junction of the struts of thi More
      In this study, the compressive stresses of dodecahedron diamond lattice structures have been investigated. The finite element method has been used for Stress analysis. After the simulation, it was found that more stresses are applied at the junction of the struts of this structure due to the application of compressive force. For this purpose, the connection point of the structure’s struts was strengthened by spherical connections, and a new type of dodecahedron structure was created. The validation and effect of spherical connections in compressive stresses have been evaluated experimentally. Two types of diamond lattice structures are made of stainless steel 316L by the SLM method. The results show that in the same condition, the use of spherical connections with twice the diameter of the structure’s struts helps to strengthen the structure and increase its compressive strength by 18% compared to the simple structure. Manuscript profile

    • Open Access Article

      2 - Simulation and Dynamic-Thermal Analysis of Ceramic Disc and Brake Pad for Optimization by Finite Element Method
      Navvab Gholami Ahmad Afsari Seyed Mohammad Reza Nazemosadat Mohammad Javad Afsari
      Issue 4 , Vol. 16 , Autumn 2023
      The braking system in cars is directly deals with the issue of safety, and as a result, it is essential to pay attention to this matter. One of the materials used to make disc and brake pads in disc brakes is a ceramic material. This research aims to simulate and analyz More
      The braking system in cars is directly deals with the issue of safety, and as a result, it is essential to pay attention to this matter. One of the materials used to make disc and brake pads in disc brakes is a ceramic material. This research aims to simulate and analyze the dynamic-thermal ceramic brake disc during the braking operation using the finite element method. Currently, the conventional brake disc is used in the Peugeot 206 car (domestic production), which has low efficiency in terms of life, wear, etc. Therefore, in this research, considering the significant production of Peugeot 206 car in the country, the disc and brake pads of this car have been selected, which were first modeled by Catia software, and after transferring the model to Abacus software and defining the types of ceramics and Cast iron was analyzed by finite element method. Compared the results of the Peugeot 206 ceramic brake disc and pad analysis were with the results of the standard (cast iron) discs in this car. The results showed that the maximum von Mises stress in the ceramic disc was 260.7 MPa, while the maximum von Mises stress in the cast iron disc was 293.3 MPa. The amount of heat produced in the ceramic disc during the braking action in 4 seconds was almost 84% less than the cast iron disc in the same period. Also, the results showed that the ceramic disc has a higher safety factor (1.98) than the cast iron disc (1.45). Manuscript profile

    • Open Access Article

      3 - Evaluation and Comparison of Different Artificial Neural Networks and Genetic Algorithm in Analyzing a 60 MW Combined Heat and Power Cycle
      parisa ghorbani Arash Karimipour
      Issue 4 , Vol. 16 , Autumn 2023
      The constant growth of energy consumption, increased fuel costs, non-renewable fossil fuel sources, and environmental pollution caused by increased emission of greenhouse gases, and global warming highlight the need for the analysis and optimization of main energy gener More
      The constant growth of energy consumption, increased fuel costs, non-renewable fossil fuel sources, and environmental pollution caused by increased emission of greenhouse gases, and global warming highlight the need for the analysis and optimization of main energy generation bases, i.e. power plants. The Artificial Neural Network (ANN) is a useful novel method for better processing information and controlling, and optimizing and modeling industrial processes. For the first time in this study, an ANN was designed and applied to data extracted from modeling and analyzing a 60 MW combined heat and power generation power plant. To this end, the error backpropagation network was selected as the optimal network, and the generator load or capacity, condenser pressure, and Feedwater temperature were considered inputs to the ANN. The energy and exergy efficiencies of the power plant and the overall energy and exergy losses of the cycle were considered outputs of the ANN. The ANN was coded and designed with the help of MATLAB. The Genetic Algorithm (GA) was used to obtain the optimal values of input parameters and the minimum losses and maximum efficiencies based on the first and second laws of thermodynamics. Manuscript profile

    • Open Access Article

      4 - Dynamic Response of FGM Plates Under Blast Load
      reza azarafza puya pirali Ali Davar majid ghadimi
      Issue 4 , Vol. 16 , Autumn 2023
      The present study investigates the deformation of FGM plates under blast load. Hamilton's principle is used to obtain the dynamic Equations. The two constituent phases, ceramic and metal, vary across the wall thickness according to a prescribed power law. Boundary condi More
      The present study investigates the deformation of FGM plates under blast load. Hamilton's principle is used to obtain the dynamic Equations. The two constituent phases, ceramic and metal, vary across the wall thickness according to a prescribed power law. Boundary conditions are assumed to be Simply Supported (SS). The type of explosive loading considered is a free in-air spherical air burst and creates a spherical shock wave that travels radially outward in all directions. For the pressure time of the explosion loading, Friedlander’s exponential relation has been used. In order to determine the response analytically, the stress potential field function is considered. Using the Galerkin method, the final Equations are obtained as nonlinear and nonhomogeneous second-order differential Equations. The effect of temperature including thermal stress resultants and different parameters on the dynamic response have been investigated. Results have been compared with references and validated. Results showed that the amplitude of the center point deflection of the FGM plate is less than the pure metal plates when exposed to blast load, by increasing the volumetric index percentage of FGM, center point deflection is increased and in the FGM plates, deformation of symmetrical plates is smaller than the asymmetric plates. Also by applying the damping coefficient of the FGM plates, the amplitude of center point deflection is reduced, and by increasing the aspect ratio of the FGM plate, its center point deflection against explosion waves is reduced and by considering the effects of thermal resultant forces and moments, center point deflection is increased. Manuscript profile

    • Open Access Article

      5 - Non-Destructive Assessment of Concrete Quality Produced with Riverbed Sand and Drainage Sand as Fine Aggregates
      Aderemi__A__Alabi Alabi Ayobami__Eniola__Agboola Agboola Joseph__Olawale__Akinyele Akinyele Victor Makinde
      Issue 4 , Vol. 16 , Autumn 2023
      In this work, the effect of fine aggregates from two different sources on the quality and strength of concrete was determined using UPV measurements. The concrete samples were produced using a nominal mix ratio of 1: 1½: 3 and water-cement ratio of 0.55, with three diff More
      In this work, the effect of fine aggregates from two different sources on the quality and strength of concrete was determined using UPV measurements. The concrete samples were produced using a nominal mix ratio of 1: 1½: 3 and water-cement ratio of 0.55, with three different aggregate sizes (3/8, ½ and ¾ inches) of granite mixed separately with sand obtained from Ogun river and a local drainage in Abeokuta, Southwestern, Nigeria. UPV was measured through each sample on days 1, 7, 14, 21 and 28 after curing using Pundit lab+ equipment. Comparison of the actual compressive strength and estimated compressive strengths from equations generated for each sample type using the crushed samples on the 7th and 28th days respectively shows that most estimations were within the acceptable ±20% variation. Results show that there is no significant difference between the samples made from using either of the two fine aggregates. Manuscript profile

    • Open Access Article

      6 - A Study on The Effects of Different Pad Materials on Brake System Performance of a High-Capacity Elevator by FEM Simulation
      Mohammad  Sajjad Mahdieh Farshad Nazari Ali Riyadh  Khairullah
      Issue 4 , Vol. 16 , Autumn 2023
      The brake system must be reliable and display unchanging action throughout its use, as it guards the health and life of many people. Properly matched friction pair, a drum, and a brake pad have a great impact on these factors. The brake pads are far more complex compone More
      The brake system must be reliable and display unchanging action throughout its use, as it guards the health and life of many people. Properly matched friction pair, a drum, and a brake pad have a great impact on these factors. The brake pads are far more complex components. New technologies make it possible to develop materials with various compositions and different proportions and connect them permanently in fully controllable processes. This elaboration shows that all these factors have a greater or lesser impact on the coefficient of friction, resistance to friction wear and high temperature, and the brake pad’s operating life. The friction materials are required to provide a stable coefficient of friction and a low wear rate at various operating speeds, pressures, temperatures, and environmental conditions. The aim of this work is therefore to investigate the possibility of using a Finite Element Analysis (FEA) approach to evaluate the braking performance of a heavy-duty elevator with different non-conventional pad materials including Composite Carbon fiber reinforced, Composite Epoxy SMC and SiC (silicon carbide). The results show that the performance of SiC (silicon carbide) is better than two other materials. In the braking system with SiC, the required time for stoppage of the system is lower than two other materials. Manuscript profile

    • Open Access Article

      7 - Effect of Post-Weld Heat Treatment on Microstructure and Mechanical Properties of AA7075 Welds
      Alireza Jalil Nasrollah Bani Mostafa Arab Malek Naderi Yaghoub Dadgar Asl
      Issue 4 , Vol. 16 , Autumn 2023
      The attractive mechanical properties of 7075 alloy, such as its high strength-to-weight ratio and fracture toughness, have received special attention in the automotive and aerospace industries. However, welding as a fabrication process has a detrimental effect on this a More
      The attractive mechanical properties of 7075 alloy, such as its high strength-to-weight ratio and fracture toughness, have received special attention in the automotive and aerospace industries. However, welding as a fabrication process has a detrimental effect on this alloy’s properties which affects its mechanical performance. In this work, to compensate for the loss in mechanical properties caused by welding, proper heat treatment operations are adopted. To this end, 1.5 mm AA7075 sheets were first preheated and butt welded using the gas tungsten arc welding process. The welded sample was solution heat treated, quenched, and then artificially aged. Microhardness tests showed an increase of hardness in all zones of the aged specimen compared to those of the original welded blank before heat treatment. A maximum microhardness value of 180 HV was recorded in the heat-affected zone of the aged specimen. In addition, elongation at break, and strength (yield, tensile, and fracture) of the original welded blank increased by about 50% after the artificial aging operation. Manuscript profile

    • Open Access Article

      8 - Experimentally Designed of PVC/NiAl2O3/AlF3 Nanocomposite by Sol-Gel Method
      Elinaz  Ahmadian Maryam Kargar Razi Babak Sadeghi Mahbobeh  Nakhaei
      Issue 4 , Vol. 16 , Autumn 2023
      In this study, we have synthesized nano Aluminum Fluoride (nAF) nanoparticles by the sol-gel method and studied the nano-sized morphology of crystals. In the other section, the PVC/NiAl2O3/AlF3 (nPNA) nanocomposite was successfully prepared and characterized by FT-IR, a More
      In this study, we have synthesized nano Aluminum Fluoride (nAF) nanoparticles by the sol-gel method and studied the nano-sized morphology of crystals. In the other section, the PVC/NiAl2O3/AlF3 (nPNA) nanocomposite was successfully prepared and characterized by FT-IR, and HRTEM techniques. FTIR peaks of the PVC and nPNA have been shown spherical shape of PVC and also spherical shapes nanoparticles of nPNA loaded on PVC. A solvothermal method has been successfully introduced and applied for catalyst efficiency. This nanocomposite was used for the removal of Congo red dye. For this purpose, the morphology and the structure of crystals have been changed by modification on precursor gel. Meanwhile, precursor gel preparation and the interaction on the nano-sized area have been studied. This study exhibited that PVC/NiAl2O3/AlF3 (nPNA) nanocomposite is an effective catalyst for the synthesis of some organic derivatives. The results show that the as-prepared nanocomposite is an efficient catalyst and that PVC/NiAl2O4/AlF3 nanocomposite can be used in the next-generation of some organic reactions and faster production of various materials. Manuscript profile

    • Open Access Article

      9 - Investigation of Pressure Distribution on Slippers of a Monorail Sled with Vibration Damper
      Mohammad Reza Najafi Saied Mahjoub Moghadas
      Issue 4 , Vol. 16 , Autumn 2023
      In this paper, the pressure distribution on the slippers of a mono-rail sled with vibration damping is investigated. Due to the many applications of sled testing in the aerospace industry, the study of system vibrations is highly noticeable. In this research, first, by More
      In this paper, the pressure distribution on the slippers of a mono-rail sled with vibration damping is investigated. Due to the many applications of sled testing in the aerospace industry, the study of system vibrations is highly noticeable. In this research, first, by mathematical modelling of the sled, the governing Equations are extracted and natural frequencies and vibration modes are obtained from the analytical method using the mass and stiffness matrix of the system. Then, using numerical simulation and validation methods with experimental results performed in wind tunnels, the modal analysis of the designed sled sample is performed. A difference of less than eight percent in both numerical and analytical methods proves the accuracy of the results. The results show that the role of the slipper in the vibrations created in the sled is very important due to the large torsional and transverse oscillations in different positions, and the highest static pressure occurs in the inner layer of the slipper. Manuscript profile

    • Open Access Article

      10 - Simulation of a Freight Train and The Effect of Wheel Flat Defect on The Wheel/Rail Dynamic Forces
      Sajjad Sattari Mohammad Saadat Sayed Hasan Mirtalaie Mehdi Salehi Ali Soleimani
      Issue 4 , Vol. 16 , Autumn 2023
      Wheel/rail interaction is one of the most important research topics in railway engineering and generally includes impact response, vibrations, and track safety. Track structure failures caused by wheel/rail impact dynamic forces can lead to significant economic loss thr More
      Wheel/rail interaction is one of the most important research topics in railway engineering and generally includes impact response, vibrations, and track safety. Track structure failures caused by wheel/rail impact dynamic forces can lead to significant economic loss through damage to rails, ballast, fastening system, etc. Wheel/rail impact forces occur due to defects in wheels and/or rails such as wheel flats, irregular wheel profiles, rail corrugation, etc. A wheel flat can cause a large dynamic impact force as well as high frequency forced vibrations, which will eventually lead to damage to the train and track structure. In the present work, a freight train (3D model) was used to analyze the dynamic impact caused by the wheel flat using UM software. The effects of wheel flat depth and length (0, 0.2, 0.5, 1, 1.5, 2, and 3 mm) at two speeds of 50 and 80 km/h on wheel/rail dynamic forces have been investigated. The results showed that the presence of a wheel flat defect significantly increases the wheel/rail dynamic impact. For example, by increasing the wheel flat depth to 3 mm, the values of maximum force at speeds of 50 and 80 km/h have changed by about 235% and 400%, respectively. Manuscript profile
    Most Viewed Articles

    • Open Access Article

      1 - Investigation of Compressive Stresses of Stainless Steel 316L Diamond Lattice Structures Under the Effect of Spherical Connections Produced by SLM Additive Manufacturing
      Behnam Ahmadi Roozbahani AliAkbar Lotfi Neyestanak
      Issue 4 , Vol. 16 , Autumn 2023
      In this study, the compressive stresses of dodecahedron diamond lattice structures have been investigated. The finite element method has been used for Stress analysis. After the simulation, it was found that more stresses are applied at the junction of the struts of thi More
      In this study, the compressive stresses of dodecahedron diamond lattice structures have been investigated. The finite element method has been used for Stress analysis. After the simulation, it was found that more stresses are applied at the junction of the struts of this structure due to the application of compressive force. For this purpose, the connection point of the structure’s struts was strengthened by spherical connections, and a new type of dodecahedron structure was created. The validation and effect of spherical connections in compressive stresses have been evaluated experimentally. Two types of diamond lattice structures are made of stainless steel 316L by the SLM method. The results show that in the same condition, the use of spherical connections with twice the diameter of the structure’s struts helps to strengthen the structure and increase its compressive strength by 18% compared to the simple structure. Manuscript profile

    • Open Access Article

      2 - Dynamic Response of FGM Plates Under Blast Load
      reza azarafza puya pirali Ali Davar majid ghadimi
      Issue 4 , Vol. 16 , Autumn 2023
      The present study investigates the deformation of FGM plates under blast load. Hamilton's principle is used to obtain the dynamic Equations. The two constituent phases, ceramic and metal, vary across the wall thickness according to a prescribed power law. Boundary condi More
      The present study investigates the deformation of FGM plates under blast load. Hamilton's principle is used to obtain the dynamic Equations. The two constituent phases, ceramic and metal, vary across the wall thickness according to a prescribed power law. Boundary conditions are assumed to be Simply Supported (SS). The type of explosive loading considered is a free in-air spherical air burst and creates a spherical shock wave that travels radially outward in all directions. For the pressure time of the explosion loading, Friedlander’s exponential relation has been used. In order to determine the response analytically, the stress potential field function is considered. Using the Galerkin method, the final Equations are obtained as nonlinear and nonhomogeneous second-order differential Equations. The effect of temperature including thermal stress resultants and different parameters on the dynamic response have been investigated. Results have been compared with references and validated. Results showed that the amplitude of the center point deflection of the FGM plate is less than the pure metal plates when exposed to blast load, by increasing the volumetric index percentage of FGM, center point deflection is increased and in the FGM plates, deformation of symmetrical plates is smaller than the asymmetric plates. Also by applying the damping coefficient of the FGM plates, the amplitude of center point deflection is reduced, and by increasing the aspect ratio of the FGM plate, its center point deflection against explosion waves is reduced and by considering the effects of thermal resultant forces and moments, center point deflection is increased. Manuscript profile

    • Open Access Article

      3 - Investigating the Effect of Separation Speed and Image Cross-Section Geometry on The Separation Force in DLP Method using FEP and PP Polymer Membranes
      Siavash Moayedi Manizani Jamal Zamani Mohammad Salehi Mohammad Taghi shayesteh
      Issue 3 , Vol. 16 , Summer 2024
      One of the most challenging issues in DLP 3D printing is separation. Thus, the capability to employ a variety of polymer membranes can considerably aid in the development of the DLP technology. The primary purpose of this study is to thoroughly explore the characteristi More
      One of the most challenging issues in DLP 3D printing is separation. Thus, the capability to employ a variety of polymer membranes can considerably aid in the development of the DLP technology. The primary purpose of this study is to thoroughly explore the characteristics influencing separation force and time on the FEP industrial membrane and the proposed PP membrane. Therefore, the impact of image cross section geometry and separation speed on separation force and separation time is investigated. As a consequence, changing the percentage of surface porosity has a negligible effect on the amount of separation force. According to the findings, reducing the cross-sectional area by 1.36% reduced the separation force by 6.5 times. Moreover, the outcomes are consistent with the mathematical model given. the separation force rose by 230% in the FEP membrane with an increase of 96 times of the speed, whereas the separation time decreased by 18.8 times. For the proposed PP membrane, as the speed increases, the separation force rate increases by 175% and the separation time falls by 29.6 times. The aforementioned findings show that the PP film may be used as a practical and affordable solution with quick separation that can reduce printing time when producing three-dimensional lattice pieces at varying speeds. Manuscript profile

    • Open Access Article

      4 - Investigation of The Effect of Notch Tip Radius on Fracture Energy of Charpy in 7075 Aluminium Alloy
      Ali Hossein zadeh Mohammad Reza Maraki Mohsen Sadidi
      Issue 2 , Vol. 13 , Spring 2024
      In the present study Charpy impact tests on a 7075-T651 aluminium alloy with full size (55×10×10 mm) with different notch tip radius (range of 0.19 to 0.40 mm) were conducted and the fracture energy was measured. The experimental results showed that the rela More
      In the present study Charpy impact tests on a 7075-T651 aluminium alloy with full size (55×10×10 mm) with different notch tip radius (range of 0.19 to 0.40 mm) were conducted and the fracture energy was measured. The experimental results showed that the relationship between the fracture energy (E) and the notch tip radius of the Charpy samples (r) for the tested Aluminium is E=18.052r+1.741. Using this relationship, the Charpy energy can be determined for this Aluminium for any notch tip radius. Fracture surfaces revealed an intergranular failure for base metal in longitudinal direction, that a predominately brittle failure (cleavage) with some insights of ductile characteristics was observed. Moreover, with increasing notch tip radius, cracked particles were observed and some microvoids were nucleated, i.e., ductile fracture. Changes in the primary crack notch cause a change in the stress intensity factor adjacent to the crack tip, where the fracture energy in the Charpy Impact Test is subjected to the primary crack notch. Manuscript profile

    • Open Access Article

      5 - Forecasting Operational Parameters of a Solar Space Heating System using a Novel Multistage Artificial Neural Network
      Farnaz Jamadi Behnam Jamali
      Issue 2 , Vol. 11 , Spring 2024
      In this study, several operational parameters of a solar energy system are predicted through using a multistage ANN model. To achieve the best design of this model, three different back-propagation learning algorithms, i.e. Levenberg-Marquardt (LM), Pola-Riber Conjugate More
      In this study, several operational parameters of a solar energy system are predicted through using a multistage ANN model. To achieve the best design of this model, three different back-propagation learning algorithms, i.e. Levenberg-Marquardt (LM), Pola-Riber Conjugate Gradient (CGP) and the Scaled Conjugate Gradient (SCG) are utilized. Further, to validate the ANN results, some experimental tests have been done in winter 2016 on a solar space heating system (SSHS) equipped with a parabolic trough collector (PTC). In the proposed model, ANN comprises three consecutive stages, while the outputs of each one are considered to be the inputs of the next. Results show that the maximum error rate in Stages 1, 2, and 3 has occurred in the LM algorithm with respectively 10, 6, and 10 neurons. Moreover, the best obtained determination coefficient of all stages belongs to the total system efficiency and has the value 0.999934 for LM-10. As a result, the multistage ANN model can simply forecast operational parameters of the solar energy systems with high accuracy. Manuscript profile

    • Open Access Article

      6 - Experimental and Numerical Analysis of Titanium/HA FGM for Dental Implantation
      Sina Sazesh Aazam Ghassemi Reza Ebrahimi Mohammad Khodaei
      Issue 1 , Vol. 10 , Winter 2017
      FGM dental implants are a very good alternative with respect to homogenous implants. In this study by focusing on mechanical property as one of the most important factors in implant design, the static behaviour of Ti/Nanostructure HA (hydroxyapatite) FGM dental implant More
      FGM dental implants are a very good alternative with respect to homogenous implants. In this study by focusing on mechanical property as one of the most important factors in implant design, the static behaviour of Ti/Nanostructure HA (hydroxyapatite) FGM dental implant has been fabricated and investigated experimentally and numerically. At the first step, the nanostructure hydroxyapatite powders were synthesized by natural origin. At the second step, the initial powders were cold compacted in order to fabricate Ti/HA FGM samples for 4 different volume fraction exponents (N=1/3, 2/3, 1, 2). Then the compacted powders have been sintered using a vacuum furnace, in which compressive strength of each particular sample was finally assessed. A three-dimensional geometrical model of FGM dental implant system and surrounding bone was created by using the macro programming language in ANSYS software and then finite element analysis under static forces was performed. Finally the experimental results strength tests were compared with numerical solutions. According to the results, the FGM dental implants made of Ti/HA under static forces were sufficiently safe. As a result, FGM sample with volume fraction exponent of N=2/3 was chosen as the best sample. Manuscript profile

    • Open Access Article

      7 - The Effect of Type and Location of a Phase Change Material (PCM) Layer in a Building Wall on Energy Consumption using Numerical Simulation
      Arezoo Soleimani Dashtaki Afshin Ahmadi Nadooshan Afshin Abedi
      Issue 4 , Vol. 12 , Autumn 2024
      Phase Change Materials (PCMs) have been the subject of many researches in recent years due to the storage and release of energy at low temperature ranges. PCMs store or releasing a large amount of energy at a constant temperature range leads to saving energy. In this pa More
      Phase Change Materials (PCMs) have been the subject of many researches in recent years due to the storage and release of energy at low temperature ranges. PCMs store or releasing a large amount of energy at a constant temperature range leads to saving energy. In this paper, the numerical modelling of a multilayer composite wall including PCM located on the southern side of a building is carried out using an implicit method. The data correspond the fifteenth day of each month in Tehran. The governing equations are discretized by the implicit Crank Nicolson method and solved by iteration method using MATLAB software. Finally, the location and volume fraction of PCM in the wall of the building are studied to achieve maximum efficiency. The results show that the effect of latent and sensible heat results in a reduction in the input heat flux and thermal load to the building. The optimum location for the PCM layer is the middle layer of the composite wall to reduce the heat transfer rate inside the building. In addition, it is found that the PCM volume fraction in gypsum does not have a significant effect on the thermal performance of the multi-layer composite wall. Hence, low volume fraction reduces the costs without affecting the thermal performance of the building. Manuscript profile

    • Open Access Article

      8 - Theoretical Predictions on Mechanical Properties of Functionally Graded Epoxy/Clay Nanocomposites
      Mahdi Karami Khorramabadi
      Issue 1 , Vol. 13 , Winter 2024
      In this paper, the theoretical predictions of mechanical properties of functionally graded and uniform distributions Epoxy/clay nanocomposites are presented. The specimens were prepared for uniformly distribution of nanoclay with different nano particles weight percent More
      In this paper, the theoretical predictions of mechanical properties of functionally graded and uniform distributions Epoxy/clay nanocomposites are presented. The specimens were prepared for uniformly distribution of nanoclay with different nano particles weight percent (pure, 3 wt%, 5 wt% and 7 wt%) and functionally graded distribution. The distribution of nanoparticles has been investigated by Field Emission Scanning Electron Microscopy (FESEM). For uniformly distribution of nanoclay, it is shown that there is no sign of the agglomerates found via FESEM imaging which can address well the distribution of nanoclay particles in epoxy. In addition, for functionally graded distributions, it is found that dispersion of nanoclays vary smoothly and continuously from one surface to the other one. The mechanical properties have been determined by simple extension tests. The results of extension tests show that elastic modulus begins to increase up to 5 wt% of nanoclay and then decreases. So, for functionally graded distribution, the elastic modulus is generally larger than the corresponding values for uniform distribution of nanoclay. The theoretical predictions of Young’s modulus for functionally graded and uniform distributions nanocomposites are calculated using a genetic algorithm procedure. The formulation for Young modulus includes the effect of nanoparticles weight fractions and it is modified for functionally graded distribution. To investigate the accuracy of the present theoretical predictions, a comparison is carried out with the experimental results. It is found that the results obtained from the theoretical predictions of genetic algorithm procedure are in good agreement with the experimental ones. Manuscript profile

    • Open Access Article

      9 - Microstructure Investigation and Mechanical Properties of Resistance Upset Butt Welded Ti-6Al-4V Alloy
      Mahmood Sharifitabar
      Issue 3 , Vol. 13 , Summer 2024
      In the present study, resistance upset butt welding was used as a solid-state process for joining Ti-6Al-4V alloy. Results showed that melting and subsequent solidification of the alloy at the joint interface promoted the development of a cast microstructure along with More
      In the present study, resistance upset butt welding was used as a solid-state process for joining Ti-6Al-4V alloy. Results showed that melting and subsequent solidification of the alloy at the joint interface promoted the development of a cast microstructure along with some pores. However, by applying the constant upset pressure of 1.62 MPa, the pore volume fraction decreased considerably with decreasing the welding current from 110 A/mm2 to 55 A/mm2. Hardness test results showed that the weld interface and the base material had the highest (352 HV) and the lowest (318 HV) values, respectively. The microstructure of the interface consisted of ά martensite and Widmanstätten laths. The tensile strength of the joints varied between 550 and 883 MPa depending on the welding parameters used. In the optimum condition, the maximum strength of the joint was about 94% of the base metal strength. Fractography of samples confirmed that the formation of pores deteriorated the strength of the joints. Manuscript profile

    • Open Access Article

      10 - Investigation of Magnitude and Position of Maximum von Mises Stress in The Cylindrical Contact Problems
      Hasan Heirani Reza Naseri
      Issue 3 , Vol. 16 , Summer 2024
      In the analysis of contact mechanics problems, determination of stress field in mechanical elements is essential. Between the stress components the von Mises stress is more important, because it is used in the investigation of yield criteria and fatigue fracture of elem More
      In the analysis of contact mechanics problems, determination of stress field in mechanical elements is essential. Between the stress components the von Mises stress is more important, because it is used in the investigation of yield criteria and fatigue fracture of elements. The aim of this study is to present formulas for determining the magnitude and position of maximum von Mises stress. For this purpose, the effect of various material properties, element geometries and loading conditions on these two parameters are investigated. By applying Hertzian contact stress and von Mises relations, the magnitude and position of maximum von Mises stress are determined. The von Mises stress is assumed to be a function of material properties, geometry of the element and loading conditions and finally two formulas are presented for the calculation of the magnitude and position of maximum von Mises stress. The results of these presented formulas are in close agreement with the literature. The error is less than 1% for depth prediction and less than 6% for stress value prediction, which confirms the accuracy of the presented formulas. Manuscript profile
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  • Affiliated to
    Islamic Azad University Isfahan Branch
    Director-in-Charge
    Dr. Hamid montazerghaem (Faculty of Engineering Najafabad branch Islamic Azad University)
    Editor-in-Chief
    Dr. Sadegh Rahmati (Associate Professor ِDepartment of Mechanical & Aerospace Engineering IAU University, Science & Research Branch Tehran, Iran)
    Editorial Board
    Dr. Saeed Daneshmand (Associate Professor; Department of Mechanical Engineering, Islamic Azad University Majlesi Branch, Isfahan, Iran) Dr. Djordje Vukelic (Professor, University of Novi Sad, Faculty of Technical Sciences, Department of Production Engineering, SerbiaProf. Djordje Vukelic is working as Head of Doctoral Study Programme in Mechanical Engineering at the Faculty of Technical Sciences in Novi Sad. He has completed his Ph.D. from Faculty of Technical Sciences in Novi Sad. At the Faculty of Technical Sciences in Novi Sad, he teaches courses on undergraduate, masters and doctoral studies to students of Mechanical Engineering and Environmental Engineering. He has published 11 books, 94 journal papers and, 102 conference papers.His research interests are focuse on process planing, computer-integrated manufacturing, tribology, engineering analysis and simulation, design of experiments, quality control, ecodesign and cleaner production.) Dr. S. Khatiboleslam Sadrnezhaad (Professor, Department of Materials Science and Engineering Sharif University of Technology Tehran, IranSayed Khatiboleslam Sadrnezhaad is an Iranian distinguished professor of materials science and engineering, at the Sharif University of Technology. He received his Ph.D. from the Massachusetts Institute of Technology in 1979 and his B.Sc. from the Sharif University of Technology in 1974. He was entitled as 1% world's top scientists by the ESI citation database from Thomson Reuters 2015 and 2016. He is the holder of a research chair from the Iran National Science Foundation (INSF). His current interest is in the emerging bio-nano and SMA fields of the materials science and engineering discipline.) Dr. Wenguang Li (Professor, School of Engineering, University of Glasgow, UKDr. Wenguang Li is the professor of mechanical engineering in the school of engineering, University of Glasgow, UK. His research interests focus on fluid dynamics and hydro design problems in fluid machines, studying these both analytically and numerically.) Dr. Habiba Bougherara (Professor, Department of Mechanical Engineering, Ryerson University, CanadaDr. Bougherera is the professor of mechanical engineering in the Toronto Metropolitan University. Her research interests are in the area of biomaterials biomechanics, with a special focus on the interface between implants and bones. She is particularly concerned with the development and assessment of biomimetic and conventional implants.Her research is aimed at producing prosthetic implant material with the same characteristics, including rigidity, as bone. Basing it on natural fibres will also allow it to integrate better with host tissues, further strengthening the bone-implant interface. This solution recognizes that since interaction between implant material and bone is inevitable, it should be used and indeed optimized as a way of designing better implants. As well as having structural, topological, and mechanical characteristics similar to those of bone, the new materials will also be green: that is, made entirely from renewable resources. This will reduce the use of non-renewable resources and the disposal problems of current implants. The aim of this research program funded by NSERC is to develop a thermodynamic framework to predict the response of the femoral bone after total hip arthroplasty. The outcome will benefit the medical industry, the patients as well as the clinical surgeons.Dr. Bougherara has won numerous grants from NSERC DG, NSERC CRDPJ, Ministry of Research and Innovation-ERA, Ontario Centres of Excellence (Collaborative research projects Grants), Industrials, Internal Research Tools and Instruments Grants, MITAC/Accelerate Ontario, Ryerson Fund for Interdisciplinary SRC. Dr. Bougherara has authored and/ or co-authored more than 50 refereed journal publications and conference proceedings.) Dr. Hirpa Gelgele Lemu (Professor, Department of Structural & Mechanical Engineering , University of Stavanger, NorwayDr. Hirpa G. Lemu is a professor of Mechanical Engineering at University of Stavanger, Department of Mechanical & Structural Engineering and Materials Technology. Dr. Lemu's  research areas focus on simulation driven design approach, design optimization, design for additive manufacturing, additive manufacturing technologies, composite materials and natural fibers, modeling and simulation of mechanical systems and material behavior characterization. He has served as research group leader of the Mechanical and Materials Engineering group at his department for several years, where developing study programs and the curriculum have been part of his main responsibilities. Currently, Dr. Lemu is the chairperson of national organ for mechanical and structural discipline whose responsibilities include advisory support in definition of learning outcomes for study programs in mechanical and structural engineering disciplines. Among recent achievements, he founded a 3D Printing lab at UiS and this lab is currently equipped with diverse 3D printers of thermoplastic, composite and metallic materials and 3D scanning tools. Dr. Lemu has been the main initiator and coordinator of an international conference organized at University of Stavanger entitled “Computational Methods in Offshore Technology”. The conference was organized in November 2019 for the second time and attracted publications from 20 different countries and will be organized every other year. He is also the initiator and faculty advisor of two student teams working on problem-based learning projects, ION Racing and UiS Subsea, who design and build Formula 1 like racecar and underwater robot respectively, for participation in annual competition of engineering students at international level. Dr. Lemu has served as member of several recruitment committees in Norway and member of PhD evaluation committee for over 15 PhD candidates at different institutions in Norway and other countries in Europe and Asia. He has published and co-published over 150 articles in reputed journals and conference proceedings. Currently, he is serving as an Areal Editor of Journal of Simulation Modelling Practice and Theory (ELSVIER), Guest Editor for Materials journal (MPDI) for a special issue entitled “Advances in Modeling and Analysis of Additive Manufactured Materials”, Reviewer of many International Journals and Scientific Committee member of several International Conferences.) Dr. Ahmad Reza Khoogar (Associate Professor, Department of Mechanical Engineering, Maleke Ashtar University of Technology, IranDr. Ahmadreza Khoogar is the assistant professor of mechanical engineering in  the university of Malek ashtar. His research interests focus on legged locomotion, neurocontrollers, three-term control, PD control,aerospace control,aerospace simulation,artificial satellites,assembling and backpropagation.) Dr. MohamadReza Khalili (Professor, Department of Mechanical Engineering, KhajehNasir Toosi University, IranDr. Ahmadreza Khoogar is the professor of mechanical engineering in  the university of Khajenasir university. His research interests focus on Advanced and Smart Materials and Structures) Dr. Moharam Habibnejad (Professor, Department of Mechanical Engineering, Iran University of Science and Technology, IranMoharam HabibnejadKorayem is a Professor in Mechanical Engineering at Iran University of Science and Technology. His research interests include dynamics of elastic mechanicalmanipulators, trajectory optimization, symbolic modeling, robotic multimediasoftware, mobile robots, industrial robotics standard, robot vision, soccer robot and the analysis of mechanical manipulator with maximum load carrying capacity. He has published more than 600 papers in international journal and conference in the robotic area. ) Dr. Rahmatollah Ghajar (Professor, Department of Mechanical Engineering KhajehNasir Toosi University, IranR. Ghajar is a professor of mechanical engineering in K.N Toosi University of Technology. His field of study includes fracture mechanics and fatigue.) Dr. Mohamad Reza Elhami (Associate Professor, Department of Mechanical Engineering, Emam Hossain University, IranM. Reza Elhami received his PhD in Mechanical Engineering from Liverpool University, UK, in 1997. He is currently Associate Professor at Mechanical Engineering Department of the Imam Hossein University (IHU), Tehran, Iran. He has been working on design and manufacturing of many industrial mechanisms in the field of control, dynamics and robotics. At present, his main research interest concern dynamic and vibration analysis in continuous media, advanced control strategies, intelligent mechanisms and advanced robotics.) Dr. Zouheir Fawaz (Professor, Department of Mechanical Engineering, Reyrson University, Toronto, CanadaDr. Zouheir Fawaz is the professor of mehanical engineering in Ryerson University. His research interests focus on composite materials, aircraft structure and damage.) Dr. Javad Akbari (Associate Professor, Department of Mechanical Engineering, Sharif University of Technology, IranJavad Akbari received his PhD in Mechanical Engineering from Chiba University,Japan in 1993. He is currently Associate Professor of Mechanical engineering at the Sharif University ofTechnology. His current research interest includes Machining, Grinding, Ultrasonic and AdditiveManufacturing) Dr. Cyrus Aghanajafi (Professor, Department of Mechanical Engineering, KhajehNasir Toosi UniversityCyrus Aghanajafi received his MSc in Mechanical Engineering from South Georgia State College and PhD and Postdoc in Mechanical Engineering from Tennessee State University in 1989. He is currently Professor at K.N.Toosi University. His current research focuses on thermodynamics andheat transfer.) Dr. Hamid Ahmadian (Professor, Department of Mechanical Engineering, Iran University of Science and Technology, IranH. Ahmadian is a Professor in the Department ofMechanical Engineering, Iran University of Science and Technology, Tehran, Iran. He received his PhD in University of Waterloo, Canada, in 1994) Dr. Mohammad R. Movahhedy (Professor Center of Excellence in Design, Robotics and Automation Department of Mechanical Engineering Sharif University of TechnologyDr. Mohammad R. Movahhedy is the Professor of Manufacturing Engineering in the Department of Mechanical Engineering,Sharif University of Technology. His research interest focus on Additive Manufacturing, 3D printing, Laser Cladding Fabrication and Application of Meta-Materials Hybrid Machining Processes; Ultrasonic and Laser assisted Machining    ) Dr. Mansour Talebi (Associate Professor, Reactor and Nuclear Safety Research School, Nuclear Science & Technology Research Institute, IranMansour Talebi is Assistant Professor of Mechanical Engineeringin Nuclear Science & Technology Research Institute (NSTRI), Iran. He received his PhDin Mechanical Engineering from Isfahan University of Technology, in 2003) Dr. Kamran Amini (Associate Professor; Department of Mechanical Engineering, Islamic Azad University Majlesi Branch, Isfahan, IranKamran Amini is Associate Professor of Materials Engineering at Islamic Azad University, Majlesi Branch, Iran. He received his PhD in Materials Engineering from Islamic Azad University. His current research focuses on Cryogenic Heat Treatment, Surface Engineering and Friction Stir Welding& Processing.) Dr. Mohsen Ashourian (Associate Professor, Islamic Azad University Majlesi Branch, Isfahan, IranMohsen Ashourian received his PhD in Electrical Engineering from University Technology Malaysia in 2001. He is currently Associate Professor at the Faculty of Engineering, Majlesi Branch, IAU, Isfahan, Iran. His current research interest includes intelligent signal processing and computer vision and automation.) Dr.Mohammadreza Khanzadeh (Associate Professor ,Majlesi Branch of Islamic azad UniversityDr. Mohammadreza Khanzadeh is the Associate Professor of Material Science and Metallurgy Engineering at Majlesi Branch of Islamic Azad University in Isfahan, Iran. He received his Ph.D. degree in Material Science and Engineering in Advanced Material from Tehran Science and Research Branch of Islamic Azad University. his major in Ph.D. and M.S is Advanced Welding Methods. his interests are as:Advanced Welding Methods,Surface Engineering,Hard facing Methods.) Dr. Mohammad Heydari Vini (Department of Mechanical Engineering, Mobarakeh Branch, Islamic Azad University, Mobarakeh, Isfahan, IranDr. Mohammad Heydari Vini is the assistant professor of Mechanical engineering at the Mobarakeh Branch, Islamic Azad University, Mobarakeh, Isfahan, Iran. He authored books and articles on rolling, sheet metal forming and metal matrix composites. His current research focuses on metal forming, metal matrix composites, materials heat treatments and sheet metal processing)
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    Number of Volumes 16
    Number of Issues 66
    Printed Articles 675
    Number of Authors 2131
    Article Views 43448
    Article Downloads 10712
    Number of Submitted Articles 1404
    Number of Rejected Articles 132
    Number of Accepted Articles 688
    Acceptance 47 %
    Time to Accept(day) 954
    Reviewer Count 1740
    Last Update 5/11/2024