A coherent gradient sensor for crack tip deformation measurements: analysis and experimental results
A coherent gradient sensor for crack tip deformation measurements: analysis and experimental results
复制标题
DOI：
10.1007/bf00036631
复制
发表时间：
1991-04
影响因子：
2.5
通讯作者：
H. Tippur;S. Krishnaswamy;A. Rosakis
中科院分区：
文献类型：
--
作者：
H. Tippur;S. Krishnaswamy;A. Rosakis
对一种用于测量表面梯度的光学干涉仪--相干梯度传感器(CGS)进行了一阶衍射分析。通过对三点弯曲断裂试件在静载作用下裂纹尖端面外位移梯度的定量测量，验证了其在断裂力学领域的适用性。这种方法有可能用于研究准静态或动态扩展裂纹附近的变形场。
A first order diffraction analysis of an optical interferometer,Coherent Gradient Sensor(CGS), for measuring surface gradients is presented. Its applicability in the field of fracture mechanics is demonstrated by quantitatively measuring the gradients of out-of-plane displacements around a crack tip in a three point bent fracture specimen under static loading. This method has potential for the study of deformation fields near a quasi-statically or dynamically growing crack.