World’s First Predictive and Validated Yarn-level FEA Modeling of the V0-V100 Probabilistic Penetration Response of Fully-Clamped Kevlar Fabri

摘要

This paper presents the world’s first fully validated and predictive capability tomodel the V0-V100 probabilistic penetration response of woven aramid fabrics using ayarn-level fabric finite element model. The V0-V100 curve describes the probability ofcomplete fabric penetration as a function of projectile impact velocity. The exemplarcase considered in this paper comprises of a single-layer, fully-clamped, plain-weaveKevlar fabric impacted at the center by two types of 0.22 cal projectiles: a 11-grspherical projectile and a 17-gr FSP or fragment-simulating projectile. Each warp andfill yarn in the fabric is individually modeled using 3D finite elements. A probabilisticcomputational framework is developed to map in the experimentally characterizedsources of statistical variability into the fabric model and then generate a numericalV0-V100 curve through a series of impact simulations at varying impact velocities. Thispaper also reports the experimental characterization data and its statistical analysisused for model input, viz. the Kevlar yarn tensile strengths, moduli, and inter-yarnfriction, and the experimental ballistic test data used for model validation.