三晶体中三晶交线附近弹性应变能集中的有限单元分析  

Finite element analysis of elastic strain energy concentrations around a triple junction

作　　者：任德斌[1] 贾维平[2] 李守新[2] 王中光[2] 

机构地区：[1]沈阳工业学院基础课部,沈阳110168 [2]中国科学院金属研究所材料疲劳与断裂国家重点实验室,沈阳110016

出　　处：《计算力学学报》2003年第3期279-285,共7页Chinese Journal of Computational Mechanics

基　　金：国家自然科学基金(59671035);"攀登计划"(95-yu-41)资助项目.

摘　　要：提出应变能集中这一概念,对三晶体中三晶交线附近的弹性应变能的集中特性进行了计算,发现当加载方向平行于三晶交线时,三晶交线附近有弹性应变能集中,但是集中程度不是很高;当加载方向垂直于三晶交线时,根据三晶体中组元晶体的相对位置的不同和取向的不同,三晶交线附近或者没有弹性应变能集中,或者有弹性应变能集中,而且在一些情况下与平行于三晶交线方向加载的情况相比,弹性应变能的集中程度要高很多。At the triple junction the elastic strain energy concentration caused by external stresses depends on both the orientations of the component grain and the loading directions. For a loading direction parallel to the triple junction, the elastic strain energy concentration is usually large. For a loading direction perpendicular to the triple junction, the elastic strain energy concentration is complex; in some cases, the elastic strain energy dispersion can occur, but in other cases, the elastic strain energy concentration is much larger than that with the loading direction parallel to the triple junction.

关 键 词：三晶体 三晶交线 弹性应变能集中 有限元分析 计算模型 力学性质 

分 类 号：O733[理学—晶体学]