Kinetic Energy Projectile Penetrating Concrete Numerical Simulation Studies

In this paper, we find out a relatively suitable concrete constitutive model and algorithm through investigating the past and current development of concrete constitutive models and numerical simulation algorithm at home and abroad. Simulation about rigid projectile penetrating concrete was carried out by this new simulation method, validating its feasibility through comparing with the experiment data in existence. The details of content are as following:1) Numerical simulation algorithm of penetration is summarized. A systematical analysis and discussion about the past and current development of various concrete models are carried out, which establishes the bases for obtaining effective concrete penetrating solution.2) Comparing the various concrete models, especially used in LS-DYNA, the relatively appropriate one is chosen, and the parameters required by the selected model are determined.3) The algorithm combined Lagrange and SPH is adopted to simulate penetration. Lagrange and SPH algorithm are compared through simulating at the same time that bar impacts lamella in high velocity and bar impacts symmetrically. Discuss the feasibility of SPH algorithm through comparing transformation course and validating conversation of energy.4) The chosen concrete model and algorithm are combined. Simulation about rigid projectile penetrating concrete was carried out through this new simulation method. Compare the experiment data in existence and give this new simulation impersonal evaluation.The research results indicate that the new obtained method keeps better precision in simulating penetration due to the high-velocity impact. The results calculated agree well with the experimental results, which prove that the new numerical simulation method is feasible.