Damage detection in a cracked rod using high-frequency electro-mechanical impedance signatures
Electro-mechanical impedance (EMI) analysis is conducted in the paper for a one-dimensional rod.Two identical PZT patches bonded symmetrically onto the top and bottom surfaces of the rod are activated in phase and hence a pure axial excitation is created.Based on the finite element software ANSYS, an electro-mechanical impedance (EMI) model for the coupled structural system consisting of the host rod, bonding layer and the piezoelectric patches is established for structural health monitoring.A comparison study with the mode superposition method usually employed in the conventional EMI model is implemented to validate the effectivity and accuracy of the proposed EMI model.Finally, the numerical results indicate that the cracks appearing in the structures can be detected by using the proposed analysis.
finite element method (FEM) cracked rod EMI damage detection
Wei WANG Wei YAN Wanchun LI
Faculty of Architectural,Civil Engineering and Environment,Ningbo University Ningbo 315211,P.R.China
国际会议
上海
英文
2171-2174
2012-10-19（万方平台首次上网日期，不代表论文的发表时间）