کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
786929 1465630 2013 19 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
A deformation mechanism map for polycrystals modeled using strain gradient plasticity and interfaces that slide and separate
موضوعات مرتبط
مهندسی و علوم پایه سایر رشته های مهندسی مهندسی مکانیک
پیش نمایش صفحه اول مقاله
A deformation mechanism map for polycrystals modeled using strain gradient plasticity and interfaces that slide and separate
چکیده انگلیسی

Small scale strain gradient plasticity is coupled with a model of grain boundaries that take into account the energetic state of a plastically strained boundary and the slip and separation between neighboring grains. A microstructure of hexagonal grains is investigated using a plane strain finite element model. The results show that three different microstructural deformation mechanisms can be identified. The standard plasticity case in which the material behaves as expected from coarse grained experiments, the nonlocal plasticity region where size of the microstructure compared to some intrinsic length scale enhances the yield stress and a third mechanism, active only in very fine grained microstructures, where the grains deform mainly in relative sliding and separation.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: International Journal of Plasticity - Volume 43, April 2013, Pages 177–195
نویسندگان
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