Damage moniotoring for composite structures by using laser-induced graphene and electrical tomography

doi:10.19936/j.cnki.2096-8000.20241028.003

Abstract

Abstract: Targeting the high velocity impact of missiles, shells and their fragments on military aircrafts, composite laminate with self-sensing capability for monitoring ballistic damage is proposed. Graphene sensing layer on the surface of polyimide paper is fabricated by laser-induced technology and co-cured in composite laminate to sense and identify damage with electrical tomography. Before and after the composite laminate is subjected to high velocity impact, excitation current is injected into the graphene sensing layer and the corresponding boundary voltage is measured. The distribution image of the conductivity change of the sensing layer caused by the damage is reconstructed by regularization-based algorithm, and information about the damage is identified. Experimental studies by ballistic impacts have shown that laser-induced graphene layer on polyimide paper has good sensing capability, and the tomography image reconstructed by electrical tomography can accurately reflect the location of damage and provide information about the approximate size of the damage, verifying the effectiveness of the proposed self-sensing composite laminate for monitoring of high velocity impact damage.

Key words: laser-induced graphene, self-sensing composite structure, high velocity impact damage monitoring, electrical tomography

CLC Number:

TB332

YU Xinfei, YAN Gang, ZHOU Deng. Damage moniotoring for composite structures by using laser-induced graphene and electrical tomography[J]. COMPOSITES SCIENCE AND ENGINEERING, 2024, 0(10): 17-23.

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