کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
7178737 | 1467645 | 2018 | 16 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Measurement of higher-order stress-strain effects in granular materials undergoing non-uniform deformation
ترجمه فارسی عنوان
اندازه گیری اثرات تنش فشار بالا در مواد دانه ای تحت تغییر شکل غیر متعارف
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کلمات کلیدی
مواد گرانول مداوم میکرو قطبی، پلاستیک پاسخ افزایشی، سفتی، سختی، روش عنصر گسسته،
موضوعات مرتبط
مهندسی و علوم پایه
سایر رشته های مهندسی
مهندسی مکانیک
چکیده انگلیسی
Discrete element (DEM) simulations demonstrate that granular materials are non-simple, meaning that the incremental stiffness of a granular assembly depends on the gradients of the strain increment as well as on the strain increment itself. In quasi-static simulations, two-dimensional granular assemblies were stiffer when the imposed deformation was non-uniform than for uniform deformation. The contacts between particles were modeled as linear-frictional contacts with no contact moments. The results are interpreted in the context of a higher-order micro-polar continuum, which admits the possibility of higher-order stress and couple-stress. Although the behavior was non-simple, no evidence was found for a couple-stress or an associated stiffness. The experimental results apply consistently to three particle shapes (circles, ovals, and a non-convex cluster shape), to assemblies of three sizes (ranging from 250 to 4000 particles), and at pre-peak and post-peak strains.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Mechanics Research Communications - Volume 92, September 2018, Pages 54-60
Journal: Mechanics Research Communications - Volume 92, September 2018, Pages 54-60
نویسندگان
Matthew R. Kuhn, Ching S. Chang,