Acoustoelastic determination of residual stress with laser Doppler velocimetry

作者：He LF^*; Kobayashi S

来源：Experimental Mechanics, 2001, 41(2): 190-194.

DOI：10.1007/BF02323196

• residual stresses
• stress-acoustic coefficient
• noncontact measurement
• laser Doppler velocimeter
• Rayleigh waves

The main object of this study is to develop a new technique for stress nondestructive measurement. A noncontact measurement technique of ultrasonic wave velocity is proposed. In the measurement system, a laser Doppler velocimeter, which is noncontact, is used to detect wave motions due to Rayleigh waves instead of a piezoelectric transducer. The noncontact measurement technique is applied to determine the stress-acoustic coefficient of Rayleigh waves for aluminum 5052 and a structural steel, and the results are in good agreement with those obtained using knife-edge piezoelectric transducers. The technique is also used to evaluate residual stress existing in an H-section rolled beam of the structural steel. The distribution of residual stress is reasonable.

• 出版日期2001-6
• 单位华南理工大学