K&C模型的随机骨料混凝土侵彻应用

Concrete Penetration Simulation Based on the Micromechanics

基于细观力学原理,建立混凝土随机骨料模型,采用动力学分析软件LS-DYNA对S.J.Hanchak的弹丸侵彻混凝土靶板的部分试验进行数值模拟,使用K&C混凝土材料模型,通过对比子弹的剩余弹速和靶板破坏现象,结果表明,混凝土细观结构的不均匀性可描述宏观上应力集中导致的局部破坏现象,K&C模型可较好地预测弹丸侵彻混凝土靶板的动态响应,是研究该问题简单而有效的办法。

Concrete random aggregate model was established based on the principle of micromechanics, ki-netic analysis software LS-DYNA numerical simulation of projectile penetrating into concrete targets SJHan-chak part of the test. Using the K ＆ C concrete material model, the remaining bombs bullets speed and target plate destruction phenomenon were compared, and results showed that the concrete mesostructure in- homogeneity can describe the partial destruction caused by the phenomenon of macroscopic stress concen-tration. K ＆ C models can be used to predict the dynamic response of the projectile penetrating into con-crete targets, which is the simple and effective way to study the problem.