K&C和HJC混凝土模型在高速侵彻作用下的适用性研究

Study on the Applicability of K&C and HJC Constitutive Model under High Speed Penetration

为考察K&C和HJC模型在模拟弹体高速侵彻作用下混凝土毁伤行为的适用性,基于LS_DYNA软件对弹体高速侵彻钢筋混凝土靶进行数值模拟。分别从混凝土损伤演化、靶板破坏尺寸以及弹体剩余速度等角度比较两种模型的适用性。结果表明:在弹体高速侵彻条件下,K&C模型能较好地反映混凝土的拉压损伤,HJC模型仅能体现压缩损伤;K&C模型中靶板的开坑、崩落和弹孔尺寸比HJC模型更接近试验结果;K&C和HJC模型均可用于高着靶速度条件下计算弹体剩余速度,当着靶速度较高时,HJC模型的计算结果更准确。

In order to investigate the applicability of K& C and HJC models in simulating concrete damage behavior under the action of high-speed penetration of projectiles, numerical simulation of projectile penetrating reinforced concrete target at high speed based on LS_DYNA software is conducted.The applicability of the two models is compared from the perspectives of concrete damage evolution, target failure size and projectile residual velocity.The results show that under the condition of projectile penetrating at high speed, the K& C model can better reflect the tension-compression damage.HJC model can only reflect compression damage.The size of the crater, collapse and bullet hole of the target in the K& C model is closer to the test results than the HJC model.Both K& C model and HJC model are suitable for calculating the residual velocity of projectile under the condition of high impact velocity.When the impact velocity is higher, the calculation result of the HJC model is more advantageous.