Influence of Defects on In-Plane Dynamic Properties of Hexagonal Ligament Chiral Structures

Although the six-ligament chiral structure has many unique properties, due to its special structure, stress concentration is prone defects. In addition, additive manufacturing also This paper studies effect of defects, which helpful for better application structure. Several new structures with random and concentrated defects were designed explore effects on in-plane dynamic properties. The studied finite element ANSYS/LSDYNA numerical simulation experimental methods. According defect-free exhibiting different deformation modes at impact velocities, defect rate type (concentrated defects) mode energy absorption characteristics are discussed. research results show that reduce varying degrees, changes under medium- low-speed impact. With increase in speed, influence weakens. Moreover, platform different. When low, more significant, as increases, obvious. study can provide guidance structural design, predict failure form containing when they impacted, realize material recycling.