| 摘要 |
PCT No. PCT/JP85/00013 Sec. 371 Date Apr. 22, 1986 Sec. 102(e) Date Apr. 22, 1986 PCT Filed Jan. 16, 1985.The present invention provides a method of measuring, by utilizing ultrasound, the factor of stress concentration at a stress-concentrated portion of a member, comprising the steps of emitting ultrasound for incidence upon the stress-concentrated portion of the member in stressed state, increasing the stress in said stressed state, comparing the acoustic pressure of the reflected wave from said stress-concentrated portion between before and after the stress is changed, for thereby measuring the factor of stress concentration and by which the factor of stress concentration of a member composing a machine or the like in a static or dynamic state can be measured easily, real-time, quantitatively, nondestructively and highly accurately.
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