Assessment of debonding in sandwich CF/EP composite beams using A0 Lamb wave at low frequency

被引：82

作者：

Mustapha, Samir ^{[1
]}

Ye, Lin ^{[1
]}

Wang, Dong ^{[1
]}

Lu, Ye ^{[1
]}

机构：

[1] Univ Sydney, LSMS, CAMT, Sch Aerosp Mech & Mechatron Engn, Sydney, NSW 2006, Australia

来源：

COMPOSITE STRUCTURES | 2011年 / 93卷 / 02期

关键词：

Debonding; Sandwich CF/EP composite beams; Lamb waves; PZT; FEA; VELOCITY IMPACT DAMAGE; ACTIVE SENSOR NETWORK; NONDESTRUCTIVE INSPECTION; IDENTIFICATION; DELAMINATION; PANELS;

D O I：

10.1016/j.compstruct.2010.08.032

中图分类号：

O3 [力学];

学科分类号：

08 ; 0801 ;

摘要：

The aim of this study is to quantitatively assess debonding in sandwich CF/EP composite structures with a honeycomb core using acoustic waves activated and captured by surface-mounted Pit elements For experimental investigation debonding was introduced at different locations in sandwich CF/EP composite beams The fundamental anti-symmetric A(0) Lamb mode was excited at a low frequency The transmitted and reflected wave signals in both surface panels were captured by Pit elements after interacting with the debonding damage and specimen boundaries Aided by finite element analysis (FEA) the differences in wave propagation characteristics in sandwich composite beams and composite laminate (e g skin panel only) were investigated The debonding location was assessed using the time-of-flight (ToF) of damage-reflected waves and the severity of debonding was evaluated using both the magnitude of the reflected wave signal and the delay in the ToF of Lamb wave signals Good correlation between the experimental and FEA simulation results was observed The results demonstrate the effectiveness of Lamb waves activated and captured by surface-mounted Pit elements on either surface of sandwich composite structures in assessing debonding (C) 2010 Elsevier Ltd All rights reserved

引用

页码：483 / 491

页数：9