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The experimental and numerical analysis of the ballistic performance of elastomer matrix Kevlar composites
Polymer Testing ( IF 5.1 ) Pub Date : 2021-08-05 , DOI: 10.1016/j.polymertesting.2021.107311
S. Samaneh Asemani 1 , Gholamhossein Liaghat 1, 2 , Hamed Ahmadi 1 , Yavar Anani 1 , Amin Khodadadi 1 , Sahand Chitsaz Charandabi 3
Affiliation  

In this paper, the behavior of high-velocity impact of Kevlar fabric and elastomer composites was investigated both experimentally and numerically. The experimental tests were performed by a gas gun device and hemispherical projectiles at different velocities, ranging from 122 m/s to 152 m/s for 2- and 4-layer samples. The penetration resistance of these composites during impact was determined using ABAQUS/Explicit. The present study's novelty lies in choosing the finite element model for Kevlar fabric and elastomer matrix in composites with nonlinear behavior to estimate the damage mechanism in the impact zone. For this purpose, the material model of the formable was used to define the damage criteria for Kevlar, and the material model of the VUMAT was used to consider the non-linear behavior and damage evolution of elastomer matrix with one of the damage criteria. Then, the dynamic behavior of the laminate was studied by a Split Hopkinson Pressure Bar. The effect of the number of layers, the shape of the projectile, the energy absorption and failure mechanisms were studied. The verification of this numerical model with experimental observations showed good agreement. The results reveal that elastomeric composites can cause to increase energy absorption and reduce the damaged area.



中文翻译:

弹性体基凯夫拉复合材料弹道性能的实验与数值分析

在本文中,Kevlar 织物和弹性体复合材料的高速冲击行为通过实验和数值进行了研究。实验测试由气枪装置和不同速度的半球弹丸进行,对于 2 层和 4 层样品,速度范围从 122 m/s 到 152 m/s。使用 ABAQUS/Explicit 确定这些复合材料在冲击过程中的抗穿透性。本研究的新颖之处在于为具有非线性行为的复合材料中的 Kevlar 织物和弹性体基体选择有限元模型来估计冲击区的损伤机制。为此,可成形材料模型用于定义 Kevlar 的损坏标准,VUMAT 的材料模型用于考虑弹性体基体的非线性行为和损伤演化,其中一种损伤标准。然后,通过拆分霍普金森压力棒研究层压板的动态行为。研究了层数、弹丸形状、能量吸收和失效机制的影响。该数值模型与实验观察的验证显示出良好的一致性。结果表明,弹性复合材料可以增加能量吸收并减少损伤面积。该数值模型与实验观察的验证显示出良好的一致性。结果表明,弹性复合材料可以增加能量吸收并减少损伤面积。该数值模型与实验观察的验证显示出良好的一致性。结果表明,弹性复合材料可以增加能量吸收并减少损伤面积。

更新日期:2021-08-11
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