Determination of stress distribution in an aluminum alloy by laser ultrasonics

作者：Qian ML^*; Pan YD; Xu WJ; Duqennoy M; Ourak M

来源：Progress in Natural Science, 2001, 11: S289-S292.

• laser ultrasonics
• residual stress
• Rayleigh wave

A residual-stress profile as a function of depth in an aluminum alloy sheet is determined by laser-ultrasonic technique. Rayleigh waves are generated by a Nd:YAG pulse laser and detected by a Heterodyne interferometer on a lateral free surface of the sheet. The distribution of residual stress is determined by measurement of the relative variation of the Rayleigh wave velocities versus the depth. The experimental result is in good agreement with that obtained with the PZT technique.

• 出版日期2001-5
• 单位同济大学