Abstract
Composite and plastic materials are used in aircraft, automobiles as metal substitutes to reduce the structural weight. However, it is evident that composite and plastic materials can not wholly replace metals. Therefore, metal and composite or plastic joining is one method that is used to satisfy the above demands. Adhesive bonding is applied commonly to join metal and composite or plastic materials. To ensure the use of safety of the structure, we proposed the electromagnetic pulse-induced acoustic testing (EPAT) method for nondestructive testing in a previous study. In this paper, we first introduce the EPAT method for detecting debonding in adhesive joints. The EPAT system for detecting debonding in FRP/Alumina is used in an experiment. Meanwhile, a 2D numerical simulation of EPAT method for metal/plastics adhesive joints is established. The experiment and simulation results show that the signal arriving at the AE sensor is delayed when there are debonding parts in a specimen. By processing received signals using FFT method; frequency domain signals also explain the difference between intact (without debonding) and debonding signals. The development of data processing for the EPAT method is required.
How to Cite:
Takagi, T. ., Sun, H. ., Kosukegawa, H. . & Hashimoto, M. ., (2019) “Electromagnetic pulse-induced acoustic testing for metal/composite or metal/plastics adhesive joints and its data processing”, Review of Progress in Quantitative Nondestructive Evaluation .
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