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利用显式动力有限元ANSYS/LS-DYNA数值研究了三角形和四边形蜂窝材料中集中缺陷对其面内冲击性能的影响。研究结果表明,对于集中缺陷,除了缺陷率,缺陷集中区域的位置也是材料设计中需要考虑的重要指标。随着缺陷率的增加,蜂窝材料的平台应力和能量吸收能力迅速降低,但随着冲击速度的增加,缺陷的影响逐渐减弱。缺陷集中区域的位置对材料的动力学响应有较大影响,而三角形蜂窝表现出更强的敏感性。此结论将为多孔材料的动力学优化设计提供了理论指导。
The influence of concentrated defects on the in-plane impact properties of triangular and quadrilateral honeycomb materials was investigated by explicit dynamic finite element ANSYS / LS-DYNA numerical simulation. The results show that, for the concentration of defects, in addition to the defect rate, the location of defects in the region is also an important indicator of material design needs to be considered. With the increase of the defect rate, the platform stress and energy absorption capacity of the honeycomb material decrease rapidly, but the impact of the defect gradually decreases with the increase of the impact velocity. The location of the defect concentration area has a greater impact on the dynamic response of the material, while the triangular honeycomb shows more sensitivity. This conclusion will provide theoretical guidance for the optimal design of porous materials.