摘要
当一定频率的超声波以适当角度对置于浸液中的薄板材料斜入射时,在板中能激励产生兰姆波,同时在声束入射点附近产生泄漏兰姆波声场。采用泄漏兰姆波C扫描技术,可成功地检出复合材料层板中的分层及孔隙等缺陷。
Lamb waves were produced in the solid plate immersed in fluid by transmitting ultrasonic longitudi nal wave with a proper angle. In the meantime, leaky Lamb waves (LLW) were received by a transducer posi tioned in the pitch-catch orientation. Using LLW setup and a C-scan system, defects in composite laminates suchas delaminations and porosities were successfully detected.
出处
《无损检测》
1999年第11期505-508,511,共5页
Nondestructive Testing
