Abstract
Essential aspects of numerical analysis for bullet hitting elastic layers of aramid fabric placed on a plastic substratum imitating the human body are presented in the paper. A review of results for bullet-proof vests tested on various substrata is included in the paper with justification of their use. It is explained why the ballistic plasticine is used as a substructure imitating the human body in most standards binding in the world for testing individual protections. Methods for modelling the fabrics with results of own numerical analyses are presented. As mutual reaction of yarns creating the interweaving of the fabric has an essential impact on its deformation then it is represented in simulations by a model that directly describes its mezzo-structure. Simulations were carried out by using an explicit procedure for integration of motion equations in program ANSYS AUTODYN v.16. The results of hitting by 9 mm bullet Parabellum FMJ (Full Metal Jacket) into the layers of Twaron® T750 fabric placed on ballistic plasticine are presented. Results of simulation and bulletproof resistance tests are compared.
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