Two New Non-AFR Criteria for Depicting Strength Differential Effect (SDE) in Anisotropic Sheet Metals
Publish place: Journal of Solid Mechanics، Vol: 10، Issue: 1
Publish Year: 1397
نوع سند: مقاله ژورنالی
زبان: English
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شناسه ملی سند علمی:
JR_JSMA-10-1_005
تاریخ نمایه سازی: 12 اسفند 1398
Abstract:
The issue of pressure sensitivity of anisotropic sheet metals is investigated with introducing two new non-AFR criteria which are called here linear and non-Linear pressure sensitive criteria. The yield and plastic potential functions of these criteria are calibrated with directional tensile/compressive yield stresses and directional tensile Lankford coefficients, respectively. To determine unknown coefficients of yield and plastic potential functions of these criteria two error functions are presented which are minimized by Downhill Simplex Method. Three anisotropic materials are considered as case studies such as Al 2008-T4 (BCC), Al 2090-T3 (FCC) and AZ31 (HCP). It is shown that the non-Linear pressure sensitive criterion is more accurate than the linear one and other existed criteria compared to experimental results in calculating the directional mechanical properties of anisotropic sheet metals.
Keywords:
Linear pressure sensitive criterion , Non-linear pressure sensitive criterion , Asymmetric anisotropic sheet metals , Non-AFR , Tensile/compressive yield stresses , Lankford coefficients
Authors
F Moayyedian
Department of Mechanical Engineering, Eqbal Lahoori Institute of Higher Education, Mashhad, Iran
M Kadkhodayan
Department of Mechanical Engineering, Ferdowsi University of Mashhad, Mashhad, Iran
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