1 November 1999 Measurement of contact stresses using real-time shearing interferometry
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The optical method coherent gradient sensing, a real-time lateral shearing interferometry, is proposed for measuring contact stress fields under static and dynamic loading conditions. Feasibility of the method is first established under quasi-static conditions. Under dynamic conditions, the method has been used in conjunction with high-speed photography. The interference patterns representing stress gradients are used for extracting impact load history. Loading rates of approximately 14 MN/sec have been observed. The optical measurements are compared with the computed values obtained using finite element simulations.
Liming Xu, Hareesh V. Tippur, Carl-Ernst Rousseau, "Measurement of contact stresses using real-time shearing interferometry," Optical Engineering 38(11), (1 November 1999). https://doi.org/10.1117/1.602243

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