کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1449338 988700 2008 10 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Refined short-range interactions in the continuum dislocation-based model of plasticity at the microscale
موضوعات مرتبط
مهندسی و علوم پایه مهندسی مواد سرامیک و کامپوزیت
پیش نمایش صفحه اول مقاله
Refined short-range interactions in the continuum dislocation-based model of plasticity at the microscale
چکیده انگلیسی

The continuum dislocation-based model that describes the size-dependent plasticity at the microscale by considering evolving fields of curved dislocations is enhanced by a refined treatment of short-range interactions between dislocations. In addition to the Taylor-type stress, a back stress that takes into account the relative orientation of the interacting dislocations has been implemented in the model. Its influence on the physical content of the model as well as on its numerical character are investigated and the effect of the Taylor relation and back stress are compared. It appears that these two stresses can be considered as valid extremes for the description of the short-range interactions for high respectively low dislocation densities. Finally, the influence of the back stress on a previously presented interpretation of the so-called source-shortening effect by the present model is studied.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Acta Materialia - Volume 56, Issue 3, February 2008, Pages 341–350
نویسندگان
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