Computational micro-mechanical model of flexible woven fabric for finite element impact simulation

This work presents a computational material model of 1exible woven fabric for 6nite element impact analysis and simulation. The model is implemented in the non-linear dynamic explicit 6nite element code LSDYNA. The material model derivation utilizes the micro-mechanical approach and the homogenization technique usually used in composite material models. The model accounts for reorientation of the yarns and the fabric architecture. The behaviour of the 1exible fabric material is achieved by discounting the shear moduli of the material in free state, which allows the simulation of the trellis mechanism before packing the yarns. The material model is implemented into the LSDYNA code as a user de6ned material subroutine. The developed model and its implementation is validated using an experimental ballistic test on KevlarJ woven fabric. The presented validation shows good agreement between the simulation utilizing the present material model and the experiment