红外幅射应力定量分析方法及其在断裂力学上的应用研究

本文研究了用红外热象系统做热幅射应力定量分析的方法、技术及应用.阐述了其物理基础、实施条件、系统结构及应用软件功能.建立了用以确定Ⅰ型裂纹应力强度因子及远场应力的基本方程。用紧凑拉伸试件实测的 K_Ⅰ值具有较好精度,并同时获得裂尖前沿各特征区的界限及范围大小,为断裂力学研究提供了一种有效的实验分析方法。

Study of Quantitative Stress Analysis by SPATE and Applied on Fracture

In this paper,the study of quantitative stress analysis by SPATE and it applica- tion have been made.The physical property,testing condition,system structure and function of applied software were issued.Based on SPATE,the characteristic region in front of crack tip were obtain and the fundamental equation applied to determine SIF K_I were established.The results show that K_I value measured in compact tension specimens had a high precise which give a effective analysis method in fracture mechanics.