云纹干涉法测定复合材料拉伸试件的应力强度因子

Using Moire Interferometry to Test Stress-Intensity Factor of Composite Material Tension Specimens

本文采用贴片云纹干涉实验方法,测试并研究了带单边裂纹正交异性材料拉伸试件的应力强度因子。从理论上推导出位移与应力强度因子之间的关系式,给出拉伸试件云纹图,实测应力强度因子KⅠ及kⅡ.

This paper tests and studies single crack stress-intensity factor of orthotro- pic tension specimens by sticking film moire interferometry.The relations be- ween displacements and stress-intensity factors were derived theoretically.A set of simple horizontal tension loading device was developed. Moire patterns of tention specimens were given out.KⅠand KⅡ strcss-intensity factors were cal- culated from crack-tip displacement field.