Bistable composite shells are suitable candidates for deployable space structures due to high stiffness to weight ratio as well as large volume reduction. Nevertheless, impact performance of bistable composite shells conflicting with space debris have been rarely studied. In this paper deployable hybrid composites constructed with combinations of carbon–carbon, carbon–kevlar, kevlar–kevlar, high-energy-absorption graphene-reinforced polyurethane elastomers are developed, and their ballistic penetration behaviors are experimentally and computationally studied. The influences of ballistic velocity on the absorbed energy, the residual velocity and damage morphology of the targets are investigated in both deployed and coiled stable states. The results show that severe local damages were observed for the carbon–carbon and carbon–kevlar samples after penetration with various velocities even first cosmic velocity, and the sample of deployable hybrid composite shell yielded the best ballistic impact resistance. The total energy absorption performance of the hybrid composite structure was greatly improved by introducing graphene-reinforced polyurethane elastomers without losing the deployability. Additionally, investigation on the energy absorption capability of deployed laminated shells with various curvature radii indicated that the curvature radius had a significant effect on the anti-penetration performance.

中文翻译：

---

可展开复合壳体弹道侵彻行为的实验和数值研究


由于高刚度重量比以及大的体积减小，双稳态复合材料壳体是可展开空间结构的合适候选者。然而，双稳态复合材料壳体与空间碎片碰撞的冲击性能却很少被研究。本文开发了由碳-碳、碳-凯夫拉、凯夫拉-凯夫拉、高能量吸收石墨烯增强聚氨酯弹性体组合而成的可展开混合复合材料，并通过实验和计算研究了它们的弹道穿透行为。研究了展开稳定状态和卷绕稳定状态下弹道速度对目标吸收能量、剩余速度和损伤形态的影响。结果表明，碳-碳和碳-凯夫拉样品在不同速度甚至第一宇宙速度侵彻后均出现严重的局部损伤，可展开混合复合材料壳体样品具有最佳的抗弹道冲击性能。通过引入石墨烯增强聚氨酯弹性体，混合复合材料结构的总能量吸收性能大大提高，同时又不损失可展开性。此外，对不同曲率半径的展开层合壳能量吸收能力的研究表明，曲率半径对抗侵彻性能有显着影响。