Electro-mechanical response of functionally graded beams with imperfectly integrated surface piezoelectric layers  

作　　者：YAN Wei1 & CHEN Weiqiu1,2 1. Department of Civil Engineering, Zhejiang University, Hangzhou 310027, China 2. State Key Lab of CAD & CG, Zhejiang University, Hangzhou 310027, China 

出　　处：《Science China(Physics,Mechanics & Astronomy)》2006年第5期513-525,共13页中国科学：物理学、力学、天文学（英文版）

基　　金：This work was supported by the National Natural Science Foundation of China (Grant Nos. 10432030 and 10372088).

摘　　要：The time-dependent behavior of a simply-supported functionally graded beam bonded with piezoelectric sensors and actuators is studied using the state-space method. The creep behavior of bonding adhesives between piezoelectric layers and beam is characterized by a Kelvin-Voigt viscoelastic model, which is practical in a high temperature circumstance. Both the host elastic functionally graded beam and the piezoelectric layers are orthotropic and in a state of plane stress, with the former being inhomogeneous along the thickness direction. A laminate model is employed to approximate the host beam. Moreover, the coupling effect between the elastic deformation and electric field in piezoelectric layers is considered. Results indicate that the viscoelastic property of interfacial adhesives has a significant effect on the function of bonded actuators and sensors with time elapsing.The time-dependent behavior of a simply-supported functionally graded beam bonded with piezoelectric sensors and actuators is studied using the state-space method. The creep behavior of bonding adhesives between piezoelectric layers and beam is characterized by a Kelvin-Voigt viscoelastic model, which is practical in a high temperature circumstance. Both the host elastic functionally graded beam and the piezoelectric layers are orthotropic and in a state of plane stress, with the former being inhomogeneous along the thickness direction. A laminate model is employed to approximate the host beam. Moreover, the coupling effect between the elastic deformation and electric field in piezoelectric layers is considered. Results indicate that the viscoelastic property of interfacial adhesives has a significant effect on the function of bonded actuators and sensors with time elapsing.

关 键 词：functionally GRADED BEAM PIEZOELECTRIC LAYERS Kelvin-Voigt model STATE-SPACE method 

分 类 号：TM22[一般工业技术—材料科学与工程]