球压法在线评价脆性材料的强度特性和残余应力  

In-situ Evaluation of Strength Properties and Residual Stresses of Brittle Materials with Spherical Indentation

作　　者：包亦望[1] 陈志城[1] 苏盛彪[1] 

机构地区：[1]中国建筑材料科学研究院,北京100024

出　　处：《无机材料学报》2002年第4期833-840,共8页Journal of Inorganic Materials

基　　金：国家杰出青年基金(50125204);863计划项目(2001AA339010);北京市基金(2002019)

摘　　要：针对接触应力和压痕临界载荷的应力分布,通过应力梯度效应讨论分析了产生球压裂纹中的几个传统强度理论无法解释的问题.利用均强度准则提出了一种脆性材料局部强度和表面残余应力的压痕测试方法,并建立了一种简便的强度保证试验技术,对脆性构件的非破坏性能评价有实用意义.The contact stress and the critical stress distribution were analyzed, and some paradoxes related to contact crack initiation were explained through the effect of stress gradient. Based on the Mean-Strength criterion, a testing method for determining the local strength and residual stress in brittle materials was developed. And also a simple technique of proof test was created, that is useful for non-destructive evaluation of the strength for brittle components.

关 键 词：球压法 在线评价 脆性材料 强度特性 残余应力 局部强度 应力梯度效应 

分 类 号：TB301[一般工业技术—材料科学与工程]