Abstract
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.
Highlights
Modern bulletproof vest commonly consists of several layers of fabric or other forms of textile fabric that resist high-speed projectiles by dissipating and absorbing their kinetic energy.[1]
Strain rate sensitive properties of the materials are considered in all the models proposed
To better understanding on the impact resistance behavior of woven fabric under projectile impact loading, a conceptual framework for the simulation model is proposed in this study
Summary
Modern bulletproof vest commonly consists of several layers of fabric or other forms of textile fabric that resist high-speed projectiles by dissipating and absorbing their kinetic energy.[1]. Kevlar and Twaron are common used in the manufacture of such high performance fabrics. While extensive ballistic impact tests should be attempted at the design processes of those high performance fabrics. It would cost most of the design time and much more expensive.
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