The second differentiation of three well known anisotropic yield functions with respect to stress components
سال انتشار: 1397
نوع سند: مقاله کنفرانسی
زبان: انگلیسی
مشاهده: 351
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شناسه ملی سند علمی:
ISME26_656
تاریخ نمایه سازی: 30 دی 1397
چکیده مقاله:
Barlat ct al. [1], Lou et al. [3] and Yoon et al. [4] criteria are three well known yield functions which are extensively used in anisotropic sheet metal forming simulations. Barlatel al. yield function is synnnctric in ( ) plane while Lou et al. and Yoon et al. yield functions are asymmetric in ( ) plane for considering strength differential effect (SDE). In current paper, the second differential of these three applied yield functions with respect to stress components are newly and in a simple fonn derived. Although deriving the second differcntiatioii of a complicated yield function is difficult, it has crucial role in implicit stress integration in non-linear finite element method.
کلیدواژه ها:
Anisotropic materials ، the second differentiation ، implicit stress integration ، non-linear finite element method
نویسندگان
farzad moayyedian
Department of Mechanical Engineering, Eqbal Lahoori Institute of Higher Education (ELIHE), Mashhad, Iran.Assistant Professor