EXPLORATION OF DAMAGE DETECTION OF IMPERFECT COMPOSITE BEAMS USING HIGH-FREQUENCY PIEZOELECTRIC SIGNATURES
The electro-mechanical impedance (EMI) technique is explored to detect the bonding imperfection of elastic laminates using high-frequency piezoelectric signatures. A model of a simply supported laminated beam bonded with a piezoelectric layer which acts as sensor/actuator, is hence studied, using the state- space method. Linear spring-like constitutive relations are employed to model 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. The covariance of the simulated data, which is a non-parametric damage index, employed to identify the severity of bonding imperfection.
laminated beam electro-mechanical impedance state space method spring-like interface model covariance
W.Q. Chen W. Yan J.B. Cai
Department of Civil Engineering, Zhejiang University, Hangzhou 310027 Department of Civil Engineering, Zhejiang University, Hangzhou 310027, P.R. China Department of Civi Department of Civil Engineering, Zhejiang University, Hangzhou 310027, P.R. China
国际会议
长沙
英文
408-412
2007-11-19（万方平台首次上网日期，不代表论文的发表时间）