Numerical Simulation And Experiment Study On Electromagnetically Induced Acoustic Emission

Electromagnetically induced acoustic emission technique (EMAE) is a bran-new non-destructive test technique (NDT) which is recently developed, it can be used for damage assessment of thin walled conducting structures. This technique allows a structure to be loaded locally by applying an electromagnetic field in order to produce an AE response, which may be captured by conventional AE sensors. As a new technique,much work is needed to theoretically study its principle and application. Because there are many nonlinear problems in EMAE, and the electromagnetic-structure coupling field problem is very complicated, traditional analytic method cannot get a comprehensive solution to these problems. In this paper, finite element analysis of EMAE is presented. In additional, we introduce the electromagnetic modulation into EMAE, so as to improve the reality feasibility of EMAE. Finally the EMAE experimental system is predesigned.