界面摩擦对Kevlar织物吸收冲击能量能力的影响

复合材料科学与工程 ›› 2015, Vol. 0 ›› Issue (9): 57-63.

界面摩擦对Kevlar织物吸收冲击能量能力的影响

史春旭^*, 段一平, 任家骏

太原理工大学机械工程学院,太原 030024

收稿日期:2015-03-15 出版日期:2015-09-28 发布日期:2021-09-14
作者简介:史春旭(1988-),男,硕士,主要从事CAD优化设计方面的研究,shichunxu2011@163.com。

EFFECT OF INTERFACIAL FRICTION ON IMPACT ENERGY ABSORPTION CAPACITY OF KEVLAR FABRIC

SHI Chun-xu^*, DUAN Yi-ping, REN Jia-jun

College of Mechanical Engineering, Taiyuan University of Technology, Taiyuan 030024, China

Received:2015-03-15 Online:2015-09-28 Published:2021-09-14

摘要/Abstract

摘要： 大量实验证明,在弹体对织物的冲击过程中,弹体与纱线之间和纱线与纱线之间的摩擦对织物吸收弹体冲击能量的能力具有显著的影响。已经证明在球型弹体对织物的冲击中,弹体与纱线之间和纱线与纱线之间的摩擦是影响织物吸能特性的重要因素,但是在平头弹体对织物的冲击过程中,界面摩擦是如何影响织物吸收冲击能量这一问题还未被研究。本文建立了织物的多尺度三维有限元模型,利用LS-DYNA模拟了平头弹体对四边固定织物的冲击过程。结果表明冲击过程中纱线的动能和势能是主要吸能机制,通过摩擦消耗的能量不是主要的吸收能量的机制,但是摩擦能够间接影响织物的吸能特性,较小的摩擦有助于促进纱线之间的相互运动和作用,同时能够增加弹体和织物相互作用的时间,有助于提高织物吸收能量的能力;弹体与纱线之间的摩擦对织物吸能特性的影响很小,纱线与纱线之间的摩擦在冲击过程中对织物吸能特性的影响起主要作用。

关键词: 冲击, 织物, 摩擦, 能量吸收

Abstract: A large number of experiments have proved that projectile-yarn and yarn-yarn friction have a significant effect on fabric's ability to absorb impact energy. It has been shown that projectile-yarn and yarn-yarn friction is an important factor in affecting the energy absorption properties of fabric in the spherical projectile impact on fabric. However, how the friction plays a role is not well known during flat projectile impact. In this paper, a multi-scale three-dimensional finite element model of fabric is established and combined with LS-DYNA to simulate the flat projectile impact on fabric with four edges clamped. Modeling indicated that yarn kinetic energy and yarn strain energy is the main energy absorption mechanism but sliding dissipated energy is not, however smaller friction help promote mutual movement between yarns,and increase the interaction time between projectile and fabric, which help to improve fabric's ability of energy absorption indirectly. Yarn-yarn friction plays a main role on fabric's ability of energy absorption, while projectile-yarn friction just has weak effect.

Key words: impact, fabric, friction, energy absorption

中图分类号:

TB332

史春旭, 段一平, 任家骏. 界面摩擦对Kevlar织物吸收冲击能量能力的影响[J]. 复合材料科学与工程, 2015, 0(9): 57-63.

SHI Chun-xu, DUAN Yi-ping, REN Jia-jun. EFFECT OF INTERFACIAL FRICTION ON IMPACT ENERGY ABSORPTION CAPACITY OF KEVLAR FABRIC[J]. COMPOSITES SCIENCE AND ENGINEERING, 2015, 0(9): 57-63.

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