玻璃-聚氨酯-玻璃结构界面脱粘缺陷的超声检测  

Ultrasonic Testing for Interfacial Debonding Defect of Glass-Polyurethane-Glass Structure

作　　者：杨红泽[1] 楚珑晟[1] YANG Hongze;CHU Longsheng(School of Material Science and Engineering, Southwest Jiaotong University, Chengdu 610031 ,China)

机构地区：[1]西南交通大学材料科学与工程学院,成都610031

出　　处：《无损检测》2017年第11期53-57,共5页Nondestructive Testing

摘　　要：针对动车车窗界面脱粘问题,采用脉冲回波法探索了玻璃-聚氨酯-玻璃3种界面的多层结构所对应的波形特征。结果表明:基于脉冲回波的波峰位置和峰值衰减情况可以判断缺陷的位置,粘接良好时48 mm和52 mm位置有明显突起的波峰;一界面脱粘时有大量间隔8 mm的波峰且峰值较高,二界面脱粘时有少量间隔8 mm的波峰且峰值较低;在合理选取判断基准的前提下,可以通过测长法和当量法对界面脱粘缺陷进行定量分析。The problem of interface debonding is a major hidden danger in operation of the vehicle. The experiment used longitudinal pulse-echo method,summarized the characteristics of three kinds of interface condition： there were obvious protruding crest at 48 mm and 52 mm when bonding well; when first-interface debond appeared,there was a large number of crest with 8 mm interval and high peak value; there was less crest with 8 mm interval and low peak when secondinterface was of debond. Last,it was proven that length measurement and equivalent method as quantitative methods of interface debond defect was feasible when reasonable judgment benchmark was selected.

关 键 词：超声检测 界面脱粘缺陷 二界面回波 波峰 

分 类 号：TB559[理学—物理] TG115.28[理学—声学]