The principle of the digital image correlation method was described, and the relation between the cracktipdisplacement and the stress intensity factor was deduced using least squares fitting.
介绍数字图像相关方法的基本原理，建立数字图像相关方法中位移场与裂纹尖端应力强度因子之间的关系。
2
The relative equation between stress intensity factor and displacement field near interface cracktip of bimaterials was derived firstly.
首先推导了双材料界面裂纹尖端的位移场和应力强度因子之间的关系式。
3
The transient displacement field and the dynamic stress intensity factor at the moving cracktip are obtained.