17 February 1987 A New Optical Method For Determining The Stress Intensity Factor
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This paper provides an optical method for determining the stress intensity factor. The optical properties of grating and wedge are used to form two images of a specime which stagger a small distance. The distance can be regulated stepless. Information of the partial derivative of the sum of principal stress around the crack tip is directly obtained by the shearing interference of two images and then the stress intensity factor is evaluated. This method is suited to both transparent and opaque material. Its sensitivity can be increased by multiplying technique.
© (1987) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Cao Hong, Cao Hong, Jia Youquan, Jia Youquan, Wang Yinyan, Wang Yinyan, } "A New Optical Method For Determining The Stress Intensity Factor", Proc. SPIE 0814, Photomechanics and Speckle Metrology, (17 February 1987); doi: 10.1117/12.941703; https://doi.org/10.1117/12.941703

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