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International Journal of Advanced Design and Manufacturing Technology
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Janbakhsh, M., Loghmanian, S., Djavanroodi, F. (2014). Application of Different Hill’s Yield Criteria to Predict Limit Strains for Aerospace Titanium and Aluminum Sheet Alloys. International Journal of Advanced Design and Manufacturing Technology, 7(1), -.
Milad Janbakhsh; S. M. R. Loghmanian; Faramarz Djavanroodi. "Application of Different Hill’s Yield Criteria to Predict Limit Strains for Aerospace Titanium and Aluminum Sheet Alloys". International Journal of Advanced Design and Manufacturing Technology, 7, 1, 2014, -.
Janbakhsh, M., Loghmanian, S., Djavanroodi, F. (2014). 'Application of Different Hill’s Yield Criteria to Predict Limit Strains for Aerospace Titanium and Aluminum Sheet Alloys', International Journal of Advanced Design and Manufacturing Technology, 7(1), pp. -.
Janbakhsh, M., Loghmanian, S., Djavanroodi, F. Application of Different Hill’s Yield Criteria to Predict Limit Strains for Aerospace Titanium and Aluminum Sheet Alloys. International Journal of Advanced Design and Manufacturing Technology, 2014; 7(1): -.

Application of Different Hill’s Yield Criteria to Predict Limit Strains for Aerospace Titanium and Aluminum Sheet Alloys

Article 5, Volume 7, Issue 1, Winter 2014  XML PDF (430 K)
Authors
Milad Janbakhsh 1; S. M. R. Loghmanian2; Faramarz Djavanroodi3
1Center of Applied Science and Technology, Jame Eslami Kargaran, Esfahan, Iran E-mail: milad.janbakhsh@gmail.com
2Department of Engineering, Islamic Azad University, Mobarakeh Branch, Iran
3College of Engineering, Qassim University, Saudi Arabia
Abstract
More recently, Titanium and aluminum alloys are gaining more interests to be implemented in hydro-forming applications. It is necessary to predict forming limits for these sheet alloys. Forming limits play an important role in metal forming processes. Forming limit diagrams, present the limit strains for various linear strain paths. In other hand, forming limit curve (FLC), illustrates localized formability for sheet metals under proportional loadings and are known as a powerful tool for trouble-shooting in sheet metal forming processes. In this study, mechanical properties of Ti-6Al-4V titanium sheets, AA7075-T6 and AA2024-T3 aluminum sheets are investigated through the uni-axial tensile test. Anisotropy coefficients as well as work-hardening exponent resulted from tensile test were used to theoretically prediction and numerical simulations of limit strains. For the theoretical prediction of the forming limit curves, several constitutive models were implemented. Several Hill’s yield criteria combined with Swift equation and empirical equation proposed by NADDRG were accomplished to predict the FLDs. Results showed that calculated numerical results are in good agreement with the predicted theoretical data when Hill93-Swift is the instability criteria used.
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