1 October 1995 Residual stress measurements with laser speckle correlation interferometry and local heat treating
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Abstract
A new experimental technique has been devised to measure residual stresses in ductile materials with a combination of laser speckle pattern interferometry and spot heating. The speckle pattern interferometer measures in-plane deformations while the heating provides for very localized stress relief. The residual stresses are determined by the amount of strain that is measured subsequent to the heating and cool-down of the region being interrogated. A simple lumped-parameter model is presented to provide a description of the method. This description is followed by presentation of the results of finite-element analyses and experimental results with uniaxial test specimens. Excellent agreement between the experiments and the computer analyses was obtained.
Martin J. Pechersky, Robert F. Miller, Chandra S. Vikram, "Residual stress measurements with laser speckle correlation interferometry and local heat treating," Optical Engineering 34(10), (1 October 1995). https://doi.org/10.1117/12.210762 . Submission:
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