کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
279530 1430350 2008 15 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Thermodynamics-based gradient plasticity theories with an application to interface models
موضوعات مرتبط
مهندسی و علوم پایه سایر رشته های مهندسی مهندسی عمران و سازه
پیش نمایش صفحه اول مقاله
Thermodynamics-based gradient plasticity theories with an application to interface models
چکیده انگلیسی

In the framework of small deformations, the so-called residual-based gradient plasticity theory is reconsidered and improved. Using the notion of moving geometrically necessary dislocations (GNDs), suitable micromechanics interpretations are heuristically given for the higher order boundary conditions and the long distance particle interactions. Also, a comparison is made between this theory and the analogous virtual work principle (VWP)-based one, whereby their respective conceptual and methodological features are pointed out. The conditions under which the two theories lead to a same constitutive model are investigated, showing that, correspondingly, a certain indeterminacy exhibited by the VWP-based theory disappears. A phenomenological interface model is used to better point out differences and analogies of the two theories.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: International Journal of Solids and Structures - Volume 45, Issue 17, 15 August 2008, Pages 4820–4834
نویسندگان
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