关键词: 侵彻, 数值模拟, 弹丸, 混凝土

Abstract:

When simulating the penetration of projectile into concrete targets, it is an important and complicated job to find a suitable material model of concrete and its parameters. A kinetic material model of concrete has many parameters which often add up to dozens; most of them cannot be obtained directly by experiments; even some of them are physically meaningless. In common cases, a few parameters can be experimentally measured in advance, and the rest parameters will be obtained by deduction according to computational results. In view of this condition, LS-DYNA provides users with a function which is able to generate parameters of concrete automatically. The function is developed by Schwer et al by means of a great deal of summaries on damage concrete model. It facilitates users to perform numerical simulations about the penetration of concrete to a large extent. In order to check the effectiveness of this function, the numerical simulation of Forrestal’s experiments is conducted, and the comparative analysis is performed for the results from computation , experiments and empirical formulations. The results show that the function is a simple and effective approach to study the penetration problems of projectile into concrete targets.

Key words: penetration, numerical simulation, projectile, concrete