细观混凝土靶抗侵彻数值模拟及侵彻深度模型

Numerical simulation on anti-penetration and penetration depth model of mesoscale concrete target

为研究细观混凝土靶的侵彻规律,采用LS-DYNA软件对刚性弹丸侵彻两相混凝土靶进行了数值模拟。结果表明,影响靶板抗侵彻能力的主要因素是砂浆种类、粗骨料种类和粗骨料体积分数;混凝土靶中的砂浆与对应的砂浆靶中的砂浆产生的阻力接近;混凝土靶中的粗骨料产生的阻力远低于对应的岩石靶中的岩石。通过扩展Forrestal阻力方程,建立了细观混凝土侵彻深度模型,模型和数值模拟一致性很好。

In order to study the penetration law of the mesoscale concrete target,The LS-DYNA software is used to simulate the penetration of rigid projectiles into two-phase concrete target.The results show that the main factors affecting the penetration resistance of the target are mortar type,coarse aggregate type and coarse aggregate volume fraction.The resistance of mortar in concrete target is close to the same part of mortar in mortar target.The resistance of coarse aggregate in concrete target is much lower than the same part of rock in rock target.By extending the Forrestal resistance equation,the penetration depth model of mesoscale concrete is established,which is in good agreement with the numerical simulation.