@inproceedings{318cb3656d4f424f96d0d38cb801dd1e,
title = "Finite element modeling of ballistic impact on Kevlar 49 fabrics",
abstract = "This paper presents an improved material model suitable for Kevlar 49 fabric which was implemented into the commercial explicit Finite Element (FE) software LS-DYNA through a user defined material subroutine (UMAT). The fabric constitutive behavior in the current material model was obtained from new experimental data in the principal material directions (warp and fill) under static loading. Two different modeling configurations, i.e. single FE layer and multiple FE layers were used to simulate the ballistic tests conducted at NASA Glenn research center. Both the shear properties of the fabric and the parameters used in Cowper-Symonds (CS) model which accounts for strain rate effect on material properties were optimized to achieve close match between the FE simulations and experimental data. The residual velocity of the projectile, the absorbed energy by the fabric after impact, and the temporal evolution and the spatial distribution of the fabric deformation and damage were closely examined. Sensitivity analysis was carried out to study the effect of the failure strain of the fabric and the coefficient of friction on the simulation results.",
keywords = "Ballistic impact, Finite element model, Kevlar fabric, Strain rate effect",
author = "Deju Zhu and Barzin Mobasher and Subramaniam Rajan",
year = "2011",
month = dec,
day = "1",
language = "English (US)",
isbn = "9781461402152",
series = "Conference Proceedings of the Society for Experimental Mechanics Series",
pages = "249--258",
booktitle = "Dynamic Behavior of Materials - Proceedings of the 2011 Annual Conference on Experimental and Applied Mechanics",
note = "2011 SEM Annual Conference on Experimental and Applied Mechanics ; Conference date: 13-06-2011 Through 16-06-2011",
}