三种蜂窝夹芯板的抗爆性能分析

Anti-Explosion Analysis of Honeycomb Sandwich Panels with Three Kinds of Core Structures

为进一步理解强爆炸载荷下蜂窝夹芯板的抗爆机理,采用ABAQUS/Explicit有限元软件,对3种蜂窝夹芯板的抗爆性能进行了数值模拟分析.对比了圆孔蜂窝、六边形蜂窝和六角排列圆管3种芯层结构的单胞的面外压缩性能,分析了夹芯板在爆炸载荷作用下的变形过程.结果表明:对于相同相对密度的3种芯层,在准静态压缩下,六角排列圆管最容易压缩,其平台应力最低,而圆孔蜂窝的平台应力最高.在相同的结构参数与爆炸载荷作用下,六角排列圆管夹芯板的背板挠度最小,抗爆性能最优.分析了圆管夹芯板抗爆性能的参数影响,结合载荷传递与芯层压缩变形机制,阐明了夹芯板的抗爆机理,并指出总吸能量不能直接反映夹芯板抗爆性能优劣.

The anti-explosion performance of three kinds of honeycomb sandwich panels was simulated and analyzed using finite element method ABAQUS/Explicit to further understand their deformation mechanism under strong explosion load.The out-of-plane compression performances of three kinds of core layer structures,namely circular hole honeycomb,hexagonal honeycomb and hexagonal array circular tubes,were compared.The deformation process of sandwich panels under explosion load was analyzed.The results show that for the three core layers with the same relative density,the hexagonal array circular tubes are the easiest to crush and have the lowest plateau stress under quasi-static compression,and the honeycomb with circular hole has the highest plateau stress.Under the explosion load,the sandwich panel with hexagonal array circular tubes has the smallest deflection of back plate with the same structural parameters,and its anti-explosion performance is the best.The influence of parameters on the anti-explosion performance of circular tube sandwich panel was analyzed.Combined with the mechanism of load transfer and compression deformation of the core,the anti-explosion mechanism of the sandwich panel was clarified,and it is pointed out that the total energy absorption cannot directly reflect the anti-explosion performance of sandwich panels.