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本文叙述了用超声方法测量材料轴向应力的计算公式,介绍了超声波轴向应力仪的工作原理,并利用该仪器对M36×260高强度螺栓进行了轴向应力的测量。实验结果表明:该仪器的声时测量精度为10~(-10s),轴向应力的测量精度优于0.4kgf/mm~2(约3.9N/mm~2)。
This paper describes the calculation method of the axial stress of the material by ultrasonic method, introduces the working principle of the ultrasonic axial stress meter, and uses the instrument to measure the axial stress of the M36 × 260 high strength bolt. The experimental results show that the accuracy of the instrument is 10 ~ (-10s) and the axial stress is better than 0.4kgf / mm ~ 2 (about 3.9N / mm ~ 2).