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Measurement of residual stresses by local melting
Measurement of residual stresses by local melting
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机译:通过局部熔化来测量残余应力
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摘要
Residual stress measurements are made using a strain gage and stress relief achieved by local melting of a region of the object being tested by a laser beam or other focused heat source. Surface strain is measured after the molten region resolidifies, and the effect of thermal stress and recast stress is eliminated by subtracting a calibration measurement of an annealed specimen. The method is semi-nondestructive, less costly than existing techniques, and can be used to measure residual stress on the interior surface of pipes.
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