中南大学学报（自然科学版）2018，Vol.49Issue(5)：1095-1102,8.DOI:10.11817/j.issn.1672-7207.2018.05.010
接触载荷作用下非均质材料表层应力集中分析
Subsurface stress concentration of heterogeneous material under contact loading
摘要
Abstract
A numerical equivalent inclusion method was used to analyze the maximum subsurface von Mises stress and its location for heterogeneous materials with regularly distributed heterogeneity elements under contact loading. The obtained results were compared with that of a homogeneous material under the same load. Further, parametric analyses were conducted to investigate the stress concentration caused by normally distributed heterogeneities in heterogeneous materials. The results show that the maximum subsurface von Mises stress of homogeneous material under a given load increases when friction coefficient becomes larger. Location of the maximum von Mises stress changes due to the existence of distributed heterogeneity elements. Subsurface stress concentration of the matrix becomes severer if the average x coordinate value of the normally distributed heterogeneities increases, or the average y coordinate value decreases. The maximum von Mises stress of materials rises firstly and then declines as the radius of inhomogeneity increases. The increase of volume fraction in heterogeneity results in a severer stress concentration in the matrix.关键词
接触载荷/非均质材料/应力集中/失效Key words
contact loading/heterogeneous material/stress concentration/failure分类
通用工业技术引用本文复制引用
杨万友,周青华,王家序,杨勇,苗强..接触载荷作用下非均质材料表层应力集中分析[J].中南大学学报（自然科学版）,2018,49(5):1095-1102,8.基金项目
国家自然科学基金资助项目(51435001,51405316) （51435001,51405316）
中央高校基本科研业务费资助项目(2017SCU12021) （2017SCU12021）
航空科学基金资助项目(20150219001)(Projects(51435001,51405316)supported by the National Natural Science Foundation of China （20150219001）
Project(2017SCU12021)supported by the Fundamental Research Funds for the Central Universities of China （2017SCU12021）
Project(20150219001)supported by Aeronautical Science Foundation of China) （20150219001）
