高共面/异面抗冲击承载能力的新型蜂窝设计及吸能评估

Design and evaluation of new honeycomb configurations with high in-plane/out-of-plane loading-carrying capacity under impact

针对传统蜂窝共面和异面承载能力差距太大的问题,提出了胞壁弓字形弯折蜂窝、层间组合蜂窝和折叠蜂窝等3种新型蜂窝,建立了新型蜂窝的有限元模型并分析了其变形模式和承载能力。结果表明,在相对密度一致的前提下,与传统正六边形蜂窝相比,这3种新构型蜂窝均缩小了共面和异面方向承载能力的差距。其中胞壁弓字形弯折蜂窝的共面/异面承载比提高了21.3倍;层间组合蜂窝两个共面方向承载能力悬殊,承载能力更强的共面方向与异面的承载比值提高了42倍;折叠蜂窝则提高了21.3倍。研究结果可以为抗多向冲击载荷作用下的蜂窝结构设计提供新思路和参考。

An aluminum honeycomb is widely used in the field of impact cushioning because of its excellent performance.In order to solve the problem of large difference between the in-plane and out-of-plane load-carrying capacities of traditional honeycombs,three new configurations of honeycombs were proposed as follows:bow-shaped,staggered and folded configurations.The finite element models for these new honeycombs were established,and their deformation modes and loadcarrying capacities were analyzed.The results show that under the same relative density,compared with the traditional hexagonal honeycombs,the three new configurations can reduce the difference of load-carrying capacity in in-plane and outof-plane directions.The average in-plane/out-of-plane(I/O)ratio of loading-carrying capacity of the bow-shaped honeycombs in two coplanar directions increased by 21.3 times.For the staggered honeycomb,the load-carrying capacity of each in-plane direction is of great difference,in which the I/O ratio of the excellent direction is increased by 42 times due to its special structure.For the folded honeycomb,the I/O ratio is increased by 21.3 times on average.The research results can provide a new idea and reference for the design of honeycomb structure under multi-directional impact load.