کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
786345 1465668 2009 19 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Plastic yielding in cyclically loaded porous materials
موضوعات مرتبط
مهندسی و علوم پایه سایر رشته های مهندسی مهندسی مکانیک
پیش نمایش صفحه اول مقاله
Plastic yielding in cyclically loaded porous materials
چکیده انگلیسی

The present paper focuses on plastic yielding of cyclically loaded porous materials. Unit cell models are employed to observe the evolution of the yield surface of porous materials under cyclic loading conditions. Non-linear isotropic as well as non-linear kinematic hardening matrix materials are considered. The yield surfaces computed with the unit cell models are compared to predictions of a micro-mechanical porous plasticity model that incorporates hardening. It is found that, in the case of kinematic hardening, the porous plasticity model underestimates the yield strength for larger hydrostatic stresses. An improvement of the model is proposed, so that a reasonable micro-mechanical approach to model porous materials under cyclic loadings is found.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: International Journal of Plasticity - Volume 25, Issue 12, December 2009, Pages 2435–2453
نویسندگان
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