复合纸蜂窝结构的力学性能与吸能特性研究

The mechanical performance and energy absorption properties of composite paper honeycomb structures

本文对不同类型、不同组合的Aramid纸蜂窝结构进行了抗压实验,并与单层蜂窝的抗压实验结果进行对比,总结其力学性能和吸能特性。组合的类型包括不带隔板的2个规格相同的蜂窝组合,以及包含铝隔板的相同规格的2个蜂窝组合。结果表明,复合纸蜂窝结构具有一定的应变率效应,并且其吸能特性远优于单层纸蜂窝,加入铝隔板的纸蜂窝吸能特性会进一步提升。为了验证实验结果,基于数值方法建立了合理的分析模型,计算结果与实验结果吻合较好。研究结果表明,含有铝隔板的组合适用于需要较大坍塌应力的防撞结构中,而无隔板组合适用于需减小初始破坏应力的阻尼吸能结构中。

Two aramid paper honeycomb structures with different types and combinations have been tested under compression,and compared with those of single aramid paper honeycomb.The mechanical performance and energy absorption properties of them have been analyzed.The types of combination include two honeycomb combinations of the same size without partition and two honeycomb combinations of the same size with aluminum partition.The results show that the double-layer honeycomb composite structure has a certain strain rate effect,and its energy absorption characteristics are far better than that of single-layer paper honeycomb,improving the energy absorption characteristics of paper honeycomb with aluminum partition.In order to verify the experimental results,a reasonable analysis model is established based on the numerical method,and the calculated results are in good agreement with the experimental ones.The combination with aluminum diaphragms is suitable for the anti-collision structure which needs larger collapse stress,while the combination without aluminum diaphragms is suitable for the damping energy absorbing structure which needs to reduce the initial failure stress.