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Measurement of residual stresses by local melting

机译:通过局部熔化来测量残余应力

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.
机译:残余应力的测量是通过使用应变仪进行的,通过通过激光束或其他聚焦热源局部熔化被测物体的区域来实现应力消除。在熔融区域重新凝固后测量表面应变,并通过减去退火样品的校准测量值来消除热应力和重铸应力的影响。该方法是半无损的,比现有技术成本更低,可用于测量管道内表面的残余应力。

著录项

  • 公开/公告号US4248094A

    专利类型

  • 公开/公告日1981-02-03

    原文格式PDF

  • 申请/专利权人 GENERAL ELECTRIC COMPANY;

    申请/专利号US19790037872

  • 发明设计人 ROBERT A. THOMPSON;HSIN-PANG WANG;

    申请日1979-05-10

  • 分类号G01N33/00;

  • 国家 US

  • 入库时间 2022-08-22 14:49:47

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