棱角反射波幅度法测量裂纹高度的研究  

Study on measurements of crack heights with amplitude of echo from right angle edge

作　　者：韩晓华[1] 刘畅[2] 于冰[2] 董欣[1] 孟令华[1] 

机构地区：[1]山东省科学院激光研究所,山东济宁272017 [2]中国科学院金属研究所,辽宁沈阳110016

出　　处：《中国测试》2014年第1期17-20,共4页China Measurement & Test

基　　金：山东省自主创新成果转化重大专项(2007zhzx10130)

摘　　要：提出一种对裂纹高度超声棱角反射测试的改进方法,推导裂纹高度H(f或面积Af)与裂纹棱角反射回波幅度Pf和无限大棱角反射回波幅度PB的方程。应用提出的计算公式,并辅以简便快捷的Matlab计算,可避免加工和使用试块,从而能够简便快捷地测量裂纹的高度,测量过程简单方便,无盲区。This paper proposes an improved method for measuring crack height with ultrasonic wave echo from corner refection of crack, and derives an equation of the crack height which governs the ratio of the crack corner echo amplitude Pf of ultrasonic wave to the infinite plane echo amplitude PB of ultrasonic wave. With the proposed equation and MATLAB aided calculation, processing test blocks and using them can be avoided. Experimental results show corner reflection method to measure the crack height is simple and convenient, and the measurement is no blind spots.

关 键 词：裂纹高度 超声横波 棱角反射法 

分 类 号：TG115.285[金属学及工艺—物理冶金] TH878.2[金属学及工艺—金属学]