Coherent Gradient Sensing Interferometry Technology and Its Application
相干梯度敏感(CGS)干涉测量技术及其应用研究

In this paper,the newest research progresses about CGS optical technology are firstly reviewed.Then the basic principle and measurement technology of CGS in transmission and in reflection are introduced,respectively.Finally the applications of CGS method to fracture mechanics are presented in detail,which not only include the optical control equations of variety of crack tip stress singularities for mode I crack,mixed mode crack,V-notch in isotropic material and gradient material,but also show the corresponding simulated and experimental CGS fringe images.The CGS governing equation represents the optics-mechanics relation of the singular yield at crack tip.These results will play an important role in theoretical research and experimental stress technology for fracture mechanics.