PDF(Pubmed)
Abstract：
Auxetic materials have recently attracted interest in the field of crashworthiness thanks to their peculiar negative Poisson ratio, leading to densification under compression and potentially being the basis of superior behavior upon impact with respect to conventional cellular cores or standard solutions. However, the empirical demonstration of the applicability of auxeticity under impact is limited for most known geometries. As such, the present work strives to advance the investigation of the impact behavior of auxetic meta-materials: first by selecting and testing representative specimens, then by proceeding with an experimental and numerical study of repeated impact behavior and penetration resistance, and finally by proposing a new design of a metallic auxetic absorber optimized for additive manufacturing and targeted at high-performance crash applications.
摘要：
由于其独特的负泊松比，最近在耐撞性领域引起了人们的兴趣，导致压缩下的致密化，并且可能是相对于常规蜂窝芯或标准溶液在冲击时表现优异的基础。然而,对于大多数已知的几何形状，在冲击下的拉张率适用性的经验证明是有限的。因此，本工作致力于推进拉胀超常材料冲击行为的研究:首先通过选择和测试代表性样品，然后通过对重复冲击行为和抗穿透性进行实验和数值研究，最后提出了一种针对增材制造进行优化并针对高性能碰撞应用的金属拉胀吸收器的新设计。
