A HYBRID METHOD FOR DAMAGE DETECTION IN COMPOSITE BEAMS EMBEDDED WITH PIEZOELECTRIC LAYERS
In this paper, the electro-mechanical impedance (EMI) technique is adopted to detect the bonding imperfection of laminated beams using high-frequency piezoelectric signatures. A model of a simply supported laminated beam embedded with a piezoelectric layer which acts as sensor/actuator,is hence studied, using the state-space method. A Linear spring-like interface model is employed to simulate the behavior of slip-type bonding imperfection. The influence of adhesion between the host laminate and the piezoelectric layer on the electric impedance signature is also investigated numerically. A non-parametric damage index called covariance is then employed to identify the severity of bonding imperfection.
Composite beams Electro-mechanical impedance State space method Spring-like interface model Covariance
Wei Yah Li-Li Yuan
Faculty of Architectural, Civil Engineering and Environment, Ningbo University, Ningbo 315211, P.R. China
国际会议
第十届国际结构工程青年学者研讨会(The Tenth International Symposium on Structural Engineering for Young Experts)
长沙
英文
1542-1546
2008-10-19（万方平台首次上网日期，不代表论文的发表时间）