钢筋混凝土靶侵彻过程中空腔膨胀响应分区研究

Based on the theoretical model of dynamic cavity-expansion of reinforced concrete, the effect of volume reinforcement ratio and concrete strength on interfacial velocity of each region was analyzed. The method for calculating the size of cracked region and crushed region under different velocities was proposed, and the influences of the reinforcement ratio and the concrete strength on the size of each region were discussed. Further the variation law of damage region was obtained. In addition, with the LS-DYNA, the threshold values of concrete, ultimate compressive strain and ultimate tensile strain, were used to identify and divide the expansion response region of concrete target cavity. And the sizes of concrete response region are obtained. Moreover, the influence of reinforcement ratio, mesh spacing and other parameters on the size of each response region was analyzed.