Energy absorption property of warp-knitted spacer fabrics with negative Possion’s ratio under low velocity impact

Abstract

Auxetic warp-knitted spacer fabric is known for its excellent mechanical properties, shear-resistance, cushioning property, energy absorbing abilities, therefore draws more and more attention to this kind of fabrics. In order to study the impact resistance and energy absorption ability of auxetic warp-knitted spacer fabrics under low-velocity impact, falling weight impact tests are adopted in this paper and influence relations of energy absorption and impact resistance to auxetic performance and initial impact energy are analyzed. Results show that the larger absolute value of negative Poisson’s ratio is, the better energy absorption ability and impact resistance could be obtained, and the initial impact energy has little influence on the overall energy absorption of fabrics under low-velocity impact.