کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1560787 1513915 2014 7 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
On the micromechanical definition of macroscopic strain and strain-rate tensors for granular materials
ترجمه فارسی عنوان
در تعریف میکرومکانیکی تانسورهای ماکروسکوپیک و فشار کششی برای مواد گرانولی
موضوعات مرتبط
مهندسی و علوم پایه سایر رشته های مهندسی مکانیک محاسباتی
چکیده انگلیسی


• Explicit micromechanical expressions for the macroscopic deformation gradient tensor.
• Definitions for various macroscopic strain and strain-rate measures.
• Main results valid both for infinitesimal strains and moderate finite strains.

Studied is the three-dimensional definition of macroscopic kinematical measures for a representative assembly element (RAE) of a dense granular material, which is assimilated to a representative volume element (RVE) filled with a continuum medium. The geometrical transition from an RAE to an RVE is constructed by means of the Voronoi and Delaunay tessellations associated with the grain centers. After establishing the compatibility conditions that the grain center displacements must satisfy, explicit micromechanical expressions are derived for the macroscopic deformation and velocity gradient tensors. Using these expressions, various macroscopic strain and strain-rate tensors are defined as in continuum mechanics.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Computational Materials Science - Volume 94, November 2014, Pages 51–57
نویسندگان
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