Abstract：The relationship between the penetration resistance and the velocity of penetrator in the process of projectile penetrating meso-scale concrete model is studied in this paper using the particle flow discrete element method. Concrete aggregates, whose sizes distribute according to the grading curve are randomly generated and placed according to the Monte Carlo method. In order to get the same effective mechanical properties as the macro-scale model, the parameters of the micro-scale model is determined by applying the parameter inversion technique to the uniaxial compression, splitting tensile, and biaxial compression tests using the particle flow discrete element micromechanical model. The influence of the aggregate, transition layer and mortar 3 phase material microscopic parameters on concrete response with respect to uniaxial compression strength as well as resistance stress on projectile with flat and conical nose are analyzed. The comparison of the numerical result of resistance stress calculated by the particle flow discrete element micromechanical model with the analytical result based on the cavity expansion theory shows that discrete element model has a good applicability and accuracy.
刘志林1，孙巍巍2，王晓鸣1. 基于颗粒流离散元模型的弹丸侵彻细观混凝土数值模拟方法研究[J]. 振动与冲击, 2016, 35(4): 162-169.
LIU Zhi-lin1, SUN Wei-wei2, WANG Xiao-ming1. MESO-SCALE NUMERICAL SIMULATION OF PROJECTILE PENETRATING CONCRETE BASED ON PARTICLE FLOW DISCRETE ELEMENT MODEL. JOURNAL OF VIBRATION AND SHOCK, 2016, 35(4): 162-169.
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