Duqennoy M, Ouaftouh M, Ourak M
DOAE, UMR CNRS 9929, Universite de Valenciennes, France.
Ultrasonics. 1999 Jun;37(5):365-72. doi: 10.1016/s0041-624x(99)00009-8.
In this paper, a non-destructive method for the determination of residual stress profiles as a function of depth in laminated aluminium alloy sheets is presented. An ultrasonic method using Rayleigh waves propagating along the sides of the sheet is proposed. The determination of residual stresses is based on the measurement of the relative variation of the ultrasonic wave velocity versus the depth. An experimental device, using the acousto-optic interaction, has been developed to measure the velocity of the Rayleigh wave. Several residual stress profiles obtained by this technique are shown. The latter are compared to other stress profiles obtained by other methods: layer removal method and acoustic detection using wedge transducer.
本文提出了一种用于测定层压铝合金板材中残余应力随深度变化的无损方法。提出了一种利用沿板材侧面传播的瑞利波的超声方法。残余应力的测定基于超声波速度随深度的相对变化测量。已开发出一种利用声光相互作用的实验装置来测量瑞利波的速度。展示了通过该技术获得的几个残余应力分布。将后者与通过其他方法获得的其他应力分布进行了比较：逐层去除法和使用楔形换能器的声学检测法。
