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Numerical evaluation of overestimation of the interface thickness around ellipsoidal particle

ISSN号：2095-0349
期刊名称：《力学快报：英文版》
时间：0
分类：TQ436.407[化学工程] TK124[动力工程及工程热物理—工程热物理;动力工程及工程热物理—热能工程]
作者机构：[1]Institute of Soft Matter Mechanics, College of Mechanics and Materials, Hohai University,Nanjing 210098, China, [2]Jiangsu Key Laboratory of Construction Materials, College of Materials Science and Engineering,Southeast University, Nanjing 211189, China
相关基金：This work was supported by the Natural Science Foun-dation Project for Jiangsu Province （BK20130841）, Na-tional Science Foundation Project for Distinguished Young Scholars （11125208）, and the Ministry of Science and Technology of China （973 Project）（2009CB623203 and 2010CB832702）.

作者： Wenxiang Xu[1,2], Huisu Chen[2], Wen Chen[1]

关键词：界面厚度, 数值评价, 球形颗粒, 接口, 物理机械性能, 数值计算模型, 截面分析, 表面纹理, multiphase materials, interface thickness, ellipsoidal particle, overestimation, model

中文摘要：

When interfacial layers are viewed as a separate phase,the interface thickness plays an essential role in assessing physico-mechanical properties of particulate materials.However,the interface thickness from sectional analysis is often overestimated,due to the irregularity of surface textures of grains in opaque materials that gives rise to the normal of a cross-sectional plane non-perpendicular to the surface of grains.Hence,the determination of the overestimation degree is very critical to precisely obtain the interface thickness.This article develops a numerical model for the overestimation degree of the interface thickness around an ellipsoidal grain with an arbitrary aspect ratio,by applying an accurate sectional analysis algorithm,and quantitative stereology and geometrical probability theories.Furthermore,on the basis of the developed numerical model,the influence of ellipsoidal particle shape on the overestimation degree is quantitatively characterized.

英文摘要：

Abstract When interfacial layers are viewed as a separate phase, the interface thickness plays an essential role in assessing physico-mechanical properties of particulate materials. However, the interface thickness from sectional analysis is often overestimated, due to the irregularity of surface textures of grains in opaque materials that gives rise to the normal of a cross-sectional plane non-perpendicular to the surface of grains. Hence, the determination of the overestimation degree is very critical to precisely obtain the interface thickness. This article develops a numerical model for the overestimation degree of the interface thickness around an ellipsoidal grain with an arbitrary aspect ratio, by applying an accurate sectional analysis algorithm, and quantitative stereology and geometrical probability theories. Furthermore, on the basis of the developed numerical model, the influence of ellipsoidal particle shape on the overestimation degree is quantitatively charac-terized.

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