TiC-Ni系功能梯度材料的断裂力学有限元分析  

CRACKING PROBLEM ANALYSIS OF TiC-Ni FGM USING FINITE ELEMENT METHOD

作　　者：张幸红[1] 李亚辉[1] 韩杰才[1] 王保林[1] 

机构地区：[1]哈尔滨工业大学复合材料研究所,哈尔滨150001

出　　处：《复合材料学报》2001年第4期87-92,共6页Acta Materiae Compositae Sinica

基　　金：国家自然科学基金项目资助 ( 10 10 2 0 0 4)

摘　　要：根据实验结果给出了功能梯度材料热物性参数的估计模型 ,用有限元素法研究了含有垂直于梯度方向裂纹的功能梯度材料 ,分别考虑了机械载荷、均匀热载荷以及非均匀热载荷作用下 ,梯度分布指数对裂纹尖端应力强度因子。In this paper,a geometric model and a model of physical properties of the system of TiC Ni functionally graded materials are given obtained from experiment. And with the two models,the influences of gradient exponent on stress intensity factors,strain energy density factors and its initiating angles are analyzed using the finite element method. The stress intensity factor and stress energy density factor of model Ⅰ under distributed load have the minimum values when P is 1.3, but the stress intensity factors and stress energy density factors of model Ⅱ under residual stress field or stable thermal field only have maximum ones. On the other hand, the influences of gradient exponent on fracture initiating angles under residual stress field or stable thermal field are much larger than under the distributed load.

关 键 词：功能梯度材料 有限元素法 应力强度因子 应变能 断裂力学 碳化钛 镍 复合材料 

分 类 号：TB333[一般工业技术—材料科学与工程] TB301