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Fiber-Level Modeling of Dynamic Strength of Kevlar® KM2 Ballistic Fabric

机译:Kevlar®KM2弹道织物动态强度的纤维级建模

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摘要

In recent years, modeling of the high-performance ballistic fabric has gradually shifted from the continuum and yarn length scales to the sub-yarn length scale which enabled establishment of the relationships between the fabric penetration resistance and various fiber-level phenomena such as fiber-fiber friction, fiber twist, transverse properties of the fibers, and the stochastic nature of fiber strength. In general, these sub-yarn modeling schemes involve special numerical techniques (e.g., digital-element method) and customized computational codes. This status of the sub-yarn fabric-modeling methods and tools makes them not readily available to wider academic and industrial research communities. In the present work, an attempt is made to use conventional finite-element methods and tools in order to carry out sub-yarn numerical analysis of the penetration resistance of Kevlar® KM2 ballistic fabric. The goal was to demonstrate that results could be obtained which are comparable to their digital-element method = based counterparts. Specifically, a series of transient nonlinear dynamics finite-element analyses was carried out in order to investigate the role of the following two important sub-yarn phenomena on the penetration resistance of Kevlar® KM2 fabric: (a) fiber transverse properties including nonlinear elastic and plastic response and (b) fiber-fiber friction within the context of stochastically distributed fiber axial strength. It is generally found that the results obtained are consistent with their digital-element method-based counterparts.
机译:近年来,高性能防弹织物的建模已从连续体和纱线长度标度逐渐转变为亚纱长度标度,从而能够建立织物抗渗透性与各种纤维水平现象(例如纤维纺丝)之间的关系。纤维摩擦,纤维扭曲,纤维的横向特性以及纤维强度的随机性。通常,这些子纱线建模方案涉及特殊的数值技术(例如,数字元素方法)和定制的计算代码。子纱织物建模方法和工具的这种状态使得它们不易为更广泛的学术和工业研究团体所用。在目前的工作中,试图使用常规的有限元方法和工具来对Kevlar®KM2弹道织物的抗穿透性进行亚纱数值分析。目的是证明可以获得与基于数字元素方法的结果相当的结果。具体而言,为了研究以下两个重要的子纱现象对Kevlar® KM2织物渗透强度的影响,进行了一系列瞬态非线性动力学有限元分析:(a)纤维横向性能包括非线性弹性和塑性响应,以及(b)随机分布的纤维轴向强度范围内的纤维-纤维摩擦。通常发现,获得的结果与基于数字元素方法的结果一致。

著录项

  • 来源
    《Journal of Materials Engineering and Performance》 |2012年第7期|p.1107-1119|共13页
  • 作者单位

    Department of Mechanical Engineering, Clemson University, 241 Engineering Innovation Building, Clemson, SC, 29634-0921, USA;

    Department of Mechanical Engineering, Clemson University, 241 Engineering Innovation Building, Clemson, SC, 29634-0921, USA;

    Department of Mechanical Engineering, Clemson University, 241 Engineering Innovation Building, Clemson, SC, 29634-0921, USA;

    Army Research Laboratory, Survivability Materials Branch, Aberdeen, Proving Ground, MD, 21005-5069, USA;

    Army Research Laboratory, Survivability Materials Branch, Aberdeen, Proving Ground, MD, 21005-5069, USA;

    Department of Mechanical and Nuclear Engineering, Kansas State University, Manhattan, KS, 66506, USA;

    Department of Mechanical and Nuclear Engineering, Kansas State University, Manhattan, KS, 66506, USA;

    U.S. Army, PM-Soldier Equipment, Haymarket, VA, 20169, USA;

  • 收录信息
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    ballistic performance; flexible armor; Kevlar® KM2 fibers and fabric; penetration resistance;

    机译:弹道性能;柔性装甲;Kevlar®KM2纤维和织物;抗穿透性;

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