裂纹尖端在三晶粒交界附近区域变形场的实验分析  

Analysis and Test on Distortion of Crack Tip in the Three Grains Joint

作　　者：张英[1] 

机构地区：[1]北京建筑工程学院,北京100044

出　　处：《机床与液压》2010年第5期46-48,37,共4页Machine Tool & Hydraulics

基　　金：北京建筑工程学院科学研究基金项目(100702607)

摘　　要：以云纹法和光学滤波技术为主,从细观尺寸对多晶体大晶粒的受力变形状态进行了测量,并观测到晶体的变形、晶界位错、滑移、晶粒之间的转移等现象。对位于三晶粒交界的裂纹尖端附近区域的微空洞萌生、长大和裂纹扩展的规律进行分析与研究。该实验结果为细观塑性理论的研究提供了重要的实验依据。Using the technology of Moir＇e interference and optical sieve, the distortion of muhi-crystal large grain was measured on loading from microcosmic dimension, and the distortion of crystal, boundary of grain changing and slipping, transferring etc were observed. Law of micro-hole budding, enlarging and crack expanding were analyzed on crack tip of the three grains Joint. The experi- mental results provide some important evidences for the research of micro-plastic theory.

关 键 词：细观力学 晶粒 云纹法 裂纹尖端 

分 类 号：TB124[理学—工程力学]