Projectile Impact With Fiber Protective Gelatin Soft Targets Numerical Simulation Research

Based on the experimental results, this paper applies ANSYS/LS-DYNA to the numerical simulation of the gelatin target with soft fiber protection anti-projectile. It analyzes the anti-projectile theory of the fiber and the damage of the gelatin whose fiber protection is not penetrated. The fiber material used in the research is ultra-high molecular weight polyethylene fiber. The projectiles are4.8mm steel ball and92a lead core bullet respectively. The result of the numerical simulation agrees with the experiment that proves the feasibility of the numerical simulation and veracity of the finite element model. Based on the result, this paper analyzes the stress and the energy conversion of each part as well as the velocity attenuation of the projectiles. Furthermore, based on the previous finite element model, the comparison of numerical simulation by changing projectile’s velocity, shooting angle and the material projectile can get the influence of the penetration ability.Combining the experiment and the numerical simulation, the conclusion can be drawn that the destruction of the front fiber layers are mainly due to shear failure while the destruction of the back are mainly caused by tensile failure. In the course of penetration, the deformation of projectile and the failure of fiber absorb the most part of the projectile’s total energy loss while the energy delivered to the gelatin is less. In the meanwhile, it can be found that the projectile with higher hardness, higher speed and smaller angle has the stronger ability of penetration.The numerical simulation results in this paper can provide reference value to the design of protective equipment and projectile.