透射式磁弹性带钢应力无损检测

Stress nondestructive testing of strip steel based on transmissive magnetoelastic effect

基于磁弹效应提出了采用电磁透射方式评价应力和残余应力的方法.针对冷轧带钢磁弹性应力测量方案设计了标定装置并以此对传感器输出特性展开了研究,阐述了其电磁应力检测原理.通过ANSYS有限元数值方法对标定装置结构承载能力进行了仿真分析,在此基础上,采用50 Hz的正弦交流的激磁系统研制了磁弹性应力测量系统样机,并通过搭建的测试平台对样机及标定块进行了单侧式与透射式两种实验方案的静态加载比较试验.试验结果表明:在标定块额定承载范围内,透射式磁测方案能够实现对钢板内应力的线性响应,为磁弹性应力测量技术的工业化应用开辟了一条新途径.

A new method for the evaluation of stress in cold rolled strip based on magnetoelastic effect is presented. The sensor output characteristics were studied and its magnetic stress detection principle was also described. Using the ANSYS finite element method,simulation analysis of the structure carrying capacity of the calibration device model was conducted. Choosing a 50 Hz sinusoidal AC excitation system,a magnetic elastic stress measurement system prototype with the gap of 1. 5 mm was developed. A performance testing platform was built to characterize the sensor output test of the prototype. The testing results show that the device can achieve linear response for stress in the steel sheet and provide a new way for the wide application of the magnetic elastic stress measurement technology.