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Computational simulation of the ballistic impact of fabrics using hybrid shell element
Journal of Engineered Fibers and Fabrics ( IF 2.9 ) Pub Date : 2020-01-01 , DOI: 10.1177/1558925020973542
Xiuyang Qian 1 , Yushan Zhou 1 , Liya Cai 2 , Feng Pei 1 , Xu Li 1
Affiliation  

This paper investigates on a computational simulation of Twaron® fabric against ballistic impact. It proposed a hybrid shell element model considering the strain-rate-sensitive failure criterion. This model innovatively provided a resolution of the yarn level to better capture the unique properties of the woven fabric, such as yarn crimp, sliding contact between yarns, stress transmission on yarns and yarn broken. The fabric is modeled using a hybrid shell element analysis approach aim of reducing the complexity and computational expense while ensuring accuracy. The response characteristics of fabric under high velocity ballistic impact are studied by applying a 3D finite element program DYNA3D in this paper and the experimental investigation had been taken by Shim et al. According to the computational and experimental results, transverse deflection distribution and stress transmission of fabrics are presented. The ballistic limit, energy absorption, remaining velocity are calculated by simulation models and compared with the experimental results. This approach is also validated by comparing it against a 2D uniform shell model and a 3D interlacing shell model. The results show that the hybrid model can accurately reflect the buckling and fluctuation behavior of fabrics and has a relatively few computational consumption at the same time.

中文翻译:

使用混合壳单元的织物弹道冲击的计算模拟

本文研究了 Twaron® 织物对抗弹道冲击的计算模拟。提出了一种考虑应变率敏感失效准则的混合壳单元模型。该模型创新地提供了纱线级别的分辨率,以更好地捕捉机织织物的独特属性,例如纱线卷曲、纱线之间的滑动接触、纱线上的应力传递和纱线断裂。使用混合壳单元分析方法对织物进行建模,目的是在确保准确性的同时降低复杂性和计算费用。本文应用 3D 有限元程序 DYNA3D 研究了织物在高速弹道冲击下的响应特性,并由 Shim 等人进行了实验研究。根据计算和实验结果,介绍了织物的横向挠度分布和应力传递。弹道极限、能量吸收、剩余速度通过仿真模型计算并与实验结果进行比较。该方法还通过将其与 2D 统一壳模型和 3D 交错壳模型进行比较来验证。结果表明,该混合模型能够准确反映织物的屈曲和涨落行为,同时计算量相对较少。
更新日期:2020-01-01
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