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arXiv · 1304.3141

Advanced holographic nondestructive testing system for residual stress analysis

Anatoli Kniazkov·Yuri Onischenko·George Dovgalenko·Gregory Salamo·Tatiana Latychevskaia
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Abstract

The design and operating of a portable holographic interferometer for residual stress analysis by creating a small scratch along with a new mathematical algorithm of calculations are discussed. Preliminary data of the stress investigations on aluminum and steel alloys have been obtained by the automatic processing of the interference pattern using a notebook computer. A phase-shift compensation technique in real-time reflection interferometry is used to measure the out-of-plane stress release surface displacement surrounding a small scratch (25 um depth and 0.5 mm width) in a plate with residual stress of around 50 MPa. Comparison between theoretical models for a rectangular and triangular shaped scratch with the experimental data are presented.

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Anatoli Kniazkov, Yuri Onischenko, George Dovgalenko, Gregory Salamo, Tatiana Latychevskaia. 2013-04-10. Advanced holographic nondestructive testing system for residual stress analysis. https://doi.org/10.1117/12.347399

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