激光全息小孔法验证超声波法残余应力无损测量

Verification of ultrasonic residual stress evaluation method by laser hologram method

摘要: 基于声弹性效应,超声波可以无损检测出结构内部应力。利用建立的基于临界折射纵波的超声波法焊接残余应力测量系统,对低碳钢双丝焊纵向焊接残余应力进行了实时快速无损测量。使用激光全息小孔法对超声波法测量系统的测量结果进行了验证。对两种方法的测量过程和测量结果进行了对比。结果表明,超声波法测量结果可靠,声波法克服了传统应力测量方法费时、耗力、破坏、体积庞大等缺点,整个设备轻便,可单人手提。系统支持程序使测量操作简便,过程实时快速。

Abstract: Based on the acoustoelasticity, the residual stress can be measured by ultrasonic method.Experimental system to measure the residual stress by ultrasonic is established with Lcr waves. The longitudinal stress of twin wire welded plate is measured by the system.The result of the ultrasonic method is verified by laser hologram interference hole-drilling method.The measurement processes of two methods are compared.The measurement process is not only nondestructive, but also real-time and quick.The system is portable and overcomes the shortcomings of the tradition methods.