Modelling Of The Bullet Perforation Of Textile Targets

The paper deals with the further development of the finite element models created in LSDYNA for simulation of the ballistic impact and perforation of the woven fabrics structures at velocities similar to 300 m/s. The bullet has been considered as a deformable body in contact with the fabric package presented by interwoven yarn structure. The simplification of the model has been achieved by presenting the multifilament yarns by thin shell elements the thickness of which represents the real thickness of yarns as it can be measured in the weave. The model considered in earlier publications of the authors on this topic has been significantly improved by introducing an orthotropic roughly meshed membrane model for the zones of the fabric remote from the point of impact and by proper adjustment of material parameters ensuring the minimum cumulative wave propagation speed error along selected directions. A set of physical and numerical experiments including the ballistic lead bullet - lead plate and lead bullet - single woven layer interactions have been performed in order to identify the model parameters.