负泊松比经编间隔织物的抗低速冲击性能

为研发具有不同负泊松比效应的经编间隔织物，对5 种负泊松比经编间隔织物试样进行落锤冲击实验，通过冲击载荷与时间和位移的关系曲线分析5 种织物在低速冲击载荷下的形态变化和能量吸收性能，研究负泊松比织物在低速冲击下的能量吸收性能与负泊松比值及初始冲击能量的关系。结果表明：织物的能量吸收性能随织物负泊松比值的增大而提高，织物的能量吸收性能越好，耐冲击性能也越好；初始冲击能量的大小也会影响织物的能量吸收速率和耐冲击性能，初始冲击能量越高，织物的耐冲击持久性越差，但对织物总的能量吸收影响不大。

Low velocity impact resistance of warp-knitted spacer fabrics of negative Poisson's ratio

In order to study the impact resistance ans energy absorption of warp-knitted spacer fabrics of different negative Poisson's ratios under low velocity impact, five fifferent auxetic warp-knitted samples were used for falling weight impact tests, and the influence relations of energy absorption rate and impact resistance to auxetic performance and initial impact energy were analyzed based on impact load-time curves and impacty load-displacement curves. Results show that the energy absorption rate and impact resistance increase with the increase of the negative Poisson's ratios value. The initial impact energy can also affect the energy absorption rate and impact resistance but have few influences on the overall energy absorption value of the fabrics under low velocity impact.