Damage Monitoring of Fiber Metal Laminates by Graphene Nanoplatelets/Epoxy Resin Conductive Matrix 


Vol. 24,  No. 6, pp. 2165-2172, Jun.  2023
10.1007/s12221-023-00216-6


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  Abstract

In this study, the real-time monitoring of the internal damage state of fiber metal laminates (FMLs) under quasi-static loading was conducted by measuring the rate of change of resistance using graphene nanoplatelets (GNPs)/epoxy resin conductive matrix. Initially, GNPs/epoxy resin matrices with varying GNPs content were prepared, and their conductivity was measured. A 1.5 vol.% GNPs/epoxy resin mixture was selected as the FMLs matrix. Subsequently, FMLs with 1.5 vol.% GNPs content were fabricated using wet lamination. The resistance changes of the FMLs under three-point bending and stretching loads were tested. The obtained curves confirmed the feasibility of establishing a conductive network in the FMLs matrix by incorporating an appropriate amount of GNPs into the epoxy resin matrix, thereby enabling real-time damage monitoring of FMLs. Experimental results revealed that as the conductive matrix in FMLs was subjected to quasi-static loads and damage occurred at different deformation stages, the resistance of the specimens under three-point bending and tensile loads increased gradually by 5% and 10%, respectively, during the elastic deformation stage, and then increased rapidly to 25% and 50%, respectively, during the plastic deformation stage with the emergence of matrix cracks. Finally, the resistance showed a precipitous increase when the load and deformation reached the damage threshold, indicating a cliff-like rise in the rate of resistance change, which allowed for a more accurate assessment of the damage mode in FMLs.

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  Cite this article

[IEEE Style]

C. Qian, S. Wang, M. Cao, "Damage Monitoring of Fiber Metal Laminates by Graphene Nanoplatelets/Epoxy Resin Conductive Matrix," Fibers and Polymers, vol. 24, no. 6, pp. 2165-2172, 2023. DOI: 10.1007/s12221-023-00216-6.

[ACM Style]

Changjiang Qian, Shuo Wang, and Meng Cao. 2023. Damage Monitoring of Fiber Metal Laminates by Graphene Nanoplatelets/Epoxy Resin Conductive Matrix. Fibers and Polymers, 24, 6, (2023), 2165-2172. DOI: 10.1007/s12221-023-00216-6.

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pISSN : 1229 - 9197
eISSN : 1875 - 0052

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