A numerical investigation of the influence of friction on energy absorption by a high-strength fabric subjected to ballistic impact
A numerical investigation of the influence of friction on energy absorption by a high-strength fabric subjected to ballistic impact
复制标题
DOI：
10.1016/j.ijimpeng.2004.11.005
复制
发表时间：
2006-08
影响因子：
5.1
通讯作者：
Y. Duan;M. Keefe;T. Bogetti;B. Cheeseman;B. Powers
中科院分区：
文献类型：
--
作者：
Y. Duan;M. Keefe;T. Bogetti;B. Cheeseman;B. Powers
采用有限元分析方法，研究了刚性球体在弹道撞击四边固支的方形织物壁板时摩擦力的影响。考察了片料与织物的摩擦和纱线与纱线之间的摩擦。模拟表明，摩擦通过阻碍主要纱线的横向运动，显著影响了冲击区的局部织物结构。横向纱线流动性的降低允许抛射物加载和断裂更多的纱线，因此具有高摩擦水平的织物比没有摩擦的织物吸收更多的能量。纱线与织物之间的摩擦通过沿纱线与织物接触区周边分布最大应力来延缓纱线断裂。纱线断裂的延迟大大增加了织物在冲击后期的能量吸收。纱线间的摩擦阻碍了纱线之间的相对运动，从而阻碍了织物组织紧度的消卷曲。它会导致交换矩阵在影响过程中更早出现故障。抛物-织物摩擦和纱线-纱线摩擦的整体影响不能简单地通过将它们的单独影响相加来计算。
A finite element analysis was conducted to study the influence of friction during ballistic impact of a rigid sphere onto a square fabric panel that was firmly clamped along its four edges. Projectile-fabric friction and yarn–yarn friction were investigated. Modeling indicates that friction dramatically affects the local fabric structure at the impact region by hindering the lateral mobility of principal yarns. Reduction of lateral yarn mobility allows the projectile to load and break more yarns so that fabric possessing a high level of friction absorbs more energy than fabric with no friction. The projectile-fabric friction delays yarn breakage by distributing the maximum stress along the periphery of the projectile-fabric contact zone. The delay of yarn breakage substantially increases the fabric energy absorption during the later stages of the impact. The yarn–yarn friction hinders the relative motion between yarns and thus resists de-crimping of fabric weave tightness. It induces the fabric to fail earlier during the impact process. The overall influence of projectile-fabric friction and yarn–yarn friction cannot be calculated by simply adding their individual effects.