STUDY ON INTERLAMINATION DAMAGE DETECTION OF COMPOSITE MATERIALS BY USING PZT-METAL STRUCTURE

Abstract

Abstract: Electro-mechanical impedance (EMI) method has been widely used in nondestructive testing of composite materials, but its accuracy in damage detection is still unsatisfactory. In this paper, based on the electro-mechanical impedance method, the damage of composite laminates is studied in the low frequency range by using the PZT-metal structure with the aid of the finite element software ANSYS. At the same time, the impedance curve of the PZT is plotted with the single-PZT structure as the comparison, and the root mean square deviation (RMSD) value is used as the standard of damage identification. It is proved that the PZT-metal structure has higher detection accuracy in low frequency and short distance from damage.

Key words: EMI, PZT-metal, the real part of impedance, RMSD, FE, composites

CLC Number:

TB332

WANG Xu, ZHENG Yan-ping, XIA Xiao-song, ZHANG Chao-yu. STUDY ON INTERLAMINATION DAMAGE DETECTION OF COMPOSITE MATERIALS BY USING PZT-METAL STRUCTURE[J]. Composites Science and Engineering, 2020, 0(7): 27-32.

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