基于MCA方法研究高速冲击下混凝土高压状态方程

Study on High-pressure State Equation of Concrete under Impact Based on MCA Method

从非连续介质力学的原理出发，建立了基于元胞单元的移动元胞自动机法的二维数值计算模型。利用移动元胞自动机法对混凝土平板撞击实验进行数值模拟，平板以10～3000m／s的速度撞击60mm厚混凝土靶。通过分析平板撞击混凝土过程中应力波的传播，得到了混凝土材料在应变率约10^5 s^-1、压力0．06～10GPa下的冲击绝热关系，给出了混凝土高压状态方程的拟合曲线。数值计筹结果与实验结果具有良好的一致性。

The two-dimensional numerical model of the movable cellular automata （MCA） method was built based on cellular element from the point of view of the discrete medium mechanics. The behavior of concrete response to planar impact was simulated using MCA method. The plate impact velocity was 10-3000m/s. The thickness of concrete specimen was 60mm. By analyzing stress wave propagation, the Hugoniot data at strain rates up to 10^5 s^-1 for concrete mate- rials were obtained under the pressure 0.06 - 10GPa. The practical state equation for the concrete material was offered. Compared with the experimental results, the simulation results are reasonable and accurate.