Extension of the Coherent Gradient Sensor (CGS) to the Combined Measurement of In-Plane and Out-of-Plane Displacement Field Gradients
Extension of the Coherent Gradient Sensor (CGS) to the Combined Measurement of In-Plane and Out-of-Plane Displacement Field Gradients
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DOI：
10.1007/s11340-008-9147-z
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发表时间：
2009-04
影响因子：
2.4
通讯作者：
Michael Mello;S. Hong;A. Rosakis
中科院分区：
文献类型：
--
作者：
Michael Mello;S. Hong;A. Rosakis
相干梯度传感器（CGS）扩展到镜面，衍射波前的光学微分，导致在平面内和平面外位移场梯度的组合测量。沿着分析了有效仪器的灵敏度，推导了基本的光学干涉原理。为了证明该技术的能力，裂纹尖端变形场的实验测量进行了各种加载条件下对应的模式-I，模式-II，和混合模式近端裂纹场。这些测试的实验程序和结果作为验证的技术。
The Coherent Gradient Sensor (CGS) is extended to the optical differentiation of specular, diffracted wave fronts leading to the combined measurement of in- and out-of-plane displacement field gradients. A derivation of the underlying optical interference principles is presented along with an analysis of the effective instrument sensitivity. In order to demonstrate the capabilities of the technique, experimental measurements of crack-tip deformation fields were conducted under various loading conditions corresponding to mode-I, mode-II, and mixed mode near-tip crack fields. The experimental procedures and results of these tests are presented as validation of the technique.