Wave propagation based damage detection and localization

摘要：

This paper presents damage localization methodologies using local or wave propagation based techniques.First,a smart layer for damage detection and localization is described.The smart layer consists of a matrix of piezoelectric elements which are driven in the pulse-echomode.This smart layer can be used formonitoring thickness changes and delaminations in composite materials.Secondly,a laser-based method for detecting and localizing of discontinuities in panels is discussed.Specifically,Lamb waves in thin plates are generated and detected using laser ultrasonics.The location and relative size of the discontinuity is determined via a signal processing procedure involving a time-frequency-representation and a special correlation applied in the group velocityfrequency domain.Finally,an autonomous technique for monitoring of overhead transmission lines based on guided waves is presented.

作者: Stefan Hurlebaus

作者单位: Zachry Department of Civil Engineering,Texas A&M University,College Station,TX 77843-3136,USA

会议类型: 国际会议

会议名称: The World Forum on Smart Materials and Smart Structures Technology(SMSST07)(2007年世界智能材料与智能结构技术论坛)

会议地点: 重庆·南京

会议语种:英文

在线出版日期: 2007-05-01（万方平台首次上网日期，不代表论文的发表时间）