Electro-thermal Coupling Simulation Analysis and Experimental Research on Lightning Damage of Carbon Fiber Composites Containing Fasteners

• Published in: Hang kong cai liao xue bao Vol. 40; no. 6; p. 80
• Main Authors: Shi, Yu, Du, Bin, Li, Leying, Liu, Qian, Zhao, Yushun, Fu, Zhong
• Format: Journal Article
• Language: Chinese
• Published: Beijing Beijing Institute of Aeronautical Materials 01.12.2020
• Subjects: Carbon fiber reinforced plastics; Carbon fibers; Composite materials; Damage; Fasteners; Fiber composites; Finite element method; Lightning strikes; Morphology; Thermal coupling; Thermal simulation; Three dimensional models
• ISSN: 1005-5053
• DOI: 10.11868/j.issn.1005-5053.2020.000074

In order to study the lightning damage characteristics of carbon fiber composite materials (CFRP) with fasteners, three-dimensional finite element models of CFRP with fasteners and CFRP without fasteners were established respectively, and the lightning damage morphology of CFRP was analyzed by electro-thermal coupling simulation, and Corresponding to the lightning current damage experiment, the damage characteristics of the two CFRPs under different lightning current peaks were compared and studied. The results show that when the lightning current peak is low, the surface damage of CFRP with fasteners is lower than that of CFRP without fasteners. As the lightning current peak increases, the damage of CFRP with fasteners along the longitudinal direction of the carbon fiber gradually increases. And eventually surpassed CFRP without fasteners. In the experiment, when the CFRP without fasteners was struck by lightning, linear damage occurred in the direction perpendicular to the carbon fiber on the surface, while