Enhanced mechanical properties in cellular solids using axisymmetric configurations

摘要

Cellular solids, as a class of materials, are known for a high strength to weight ratio. Their design into non-stochastic configurations is known to be beneficial for the tailor and control of their mechanical properties. The current developments on additive manufacturing allow a successful route to manufacture these scaffolds and gives a novel freedom in their design process. This study explores the deformation behavior of axisymmetric non-stochastic cellular solids, allowing the understanding of the mechanisms that enhance their mechanical properties relatively to regular extruded lattices. It is shown that axisymmetric samples display a circumferential deformation effect that distributed loads along the volume of the material. This effect, however, is more prominent in axisymmetric samples with auxetic behavior. The coupling of circumferential deformation and the dynamic density changes in auxetic samples generate an overall increase in modulus, collapse stress and energy absorption.