复合材料表面导电涂层的应力分析研究

Composites Stress Analysis of Conductive Coating on Composite Surface

摘要: 为研究复合材料表面导电涂层的应力分布及影响因素，通过有限元分析方法研究了纤维增强的复合材料基底上镀铝膜和铜膜的应力分布，以及有过渡层导电涂层的应力变化趋势。结果表明：增加过渡层后，形成的“导电涂层/过渡层/复合材料基底”结构具有较强的抗冷热冲击能力，理论上可以长时间承受冷热冲击(125℃~−180℃)的环境考验，满足空间冷热交变环境的使用要求。可见在树脂基复合材料表面抗冷热冲击导电涂层热应力仿真基础上开展工艺试验，能够进一步提高涂层附着力，降低涂层应力，优化涂层的结构设计。

Abstract: In order to study the stress distribution and influencing factors of conductive coating on composite surface, the stress distribution of aluminized film and copper film on fiber reinforced composite substrate, and the stress variation trend of transition layer conductive coating were used to investigate by finite element analysis. The results show that after the transition layer is added, the “conductive coating/transition layer/composite substrate” structure has strong resistance to cold and heat shock, and theoretically can withstand cold and thermal shock for a long time (125˚C - −180˚C) in the test environmental. It can meet the requirement for the use of space cold and heat alternating environments. It is concluded that the process test is carried out on the basis of the thermal stress simulation of the thermal-impact resistant conductive coating on the surface of the resin-based composite material, which can further improve the adhesion of the coating, reduce the coating stress and optimize the structural design of the coating.