OPCM AE传感器特性的理论仿真与实验研究
Principled simulation and test research on performance of OPCM AE sensor
WU Ai-jun, LUO Ying, GU Jian-zu, TAN Mei-lan
(Faculty of Science ,Jiangsu University ,Zhenjiang 212013 ,China)
Abstract: Based on the theories of uniform fields and micromechanics , for the 1-1 orthotropic piezoelectric composites materials ( OPCM ) sensors in structural damage acoustic emission ( AE) test, equivalent electromechanical model is established and some equivalent electromechanicl parameters are derived, comparing these parameters the distinct orthotropic performance of OPCM is discovered. The result is gained that the sensor electrode volt outputs have evidence difference under the actions of the unilateral stress wave in x and/or zdirection by finite element mothods simulation. The result of theorthotropic performace that OPCM AE sensors can distinguish stress waves from the different directions is obtained further by the designed experiment. The experiment indicates that the OPCM AE sensor has strong response to stress wave from special direction.
Key words: equivalent electromechanical parameters; finite element mothods; orthotropic piezoelectric composites meterials( OPCM) acoustic emission( AE) sensors; orthotropic; AE test