摘要
采用云纹干涉法和相移技术相结合对载荷作用下的正交异性双材料界面裂纹模型的位移场进行实验测定,通过计算机图像自动采集和处理,获得了实验模型的位移场云纹图.使用云纹数字图像处理软件,对实验所得位移场云纹图进行处理,可以获得界面裂纹尖端所需的实验数据,对实验数据进行处理分析,求出界面裂纹尖端的应力强度因子值.实验结果表明:在单向拉应力作用下,正交异性双材料模型的应力强度因子为复合型,且第一项对裂纹扩展起决定作用.
Displacement fields of orthotropic bi-material interface crack model under loading are tested by phase-shifting moiré interferometry system which is consisted by combined moiré interferometry and phase-shifting instrument.By computer image automation collecting and processing,moiré maps of displacement of the experiment model is to be gained.Then,requirement experimental data of the tip of interface crack could be obtained by using moiré digital image processing software and stress intensity factor value can be calculated with the experimental data.Experiment results show that under unilateralism tensile stress,intensity factor value of the crack tip of orthotropic bi-materials model is multiplex,and the first item plays a crucial role in crack propagation.
出处
《湖南理工学院学报（自然科学版）》
CAS
2010年第4期66-68,共3页
Journal of Hunan Institute of Science and Technology(Natural Sciences)
关键词
云纹干涉法
相移技术
双材料
界面裂纹
moiré interferometry
phase-shifting techniques
bi-material
interface crack
