Analysis Of Penetration Effects Of Shaped-Charge Warhead To Concrete Target

In this dissertation, the formation, the property, and the penetration effect in concrete target for shaped charge jet are studied.The concrete constitutive model is investigated. Based on the static compressive strength and the combination of some empirical formulate, major mechanical parameters are determined.According to basic theory of shaped charge, formulas of the initial parameters of each microunit in shaped charge liners and the parameters such as velocity, length, and radius of each microunit in jet and slug for different explosive filled structures are deduced, and critical conditions of jet formation are discussed.The phenomena of jet penetrating concrete target are discussed by detail. By means of quasi-static cavity expansion theory, target strength resistance formulas are deduced for different response of target. The criterion of concrete material fluid model is presented, the formula of penetration depth is determined. Based on the assumptions that the stress and velocity distribution in the target have spherical quality, the effect of the material constitutive model for the penetration resistance is analyzed. The crater radius is calculated using energy method, momentum method, and the two stage cavity expansion method respectively.Based on the theory model, calculation is obtained using MATLAB language to describe the whole process such as liner collapse, jet formation, jet stretch, and the penetration of concrete and good result is attained.. Data of shaped charge penetrating concrete are analyzed and compared with calculated values, and the practicability of the model is proved.