Numerical simulation for projectile penetrating meso-scale concrete based on particle flow discrete element model

被引：0
作者：
Liu Z.-L. [1 ]
Sun W.-W. [2 ]
Wang X.-M. [1 ]
机构：
[1] National Defense Key Laboratory of ZNDY, Nanjing University of Science and Technology, Nanjing
[2] Civil Engineering Department, Nanjing University of Science and Technology, Nanjing
来源：
Zhendong yu Chongji/Journal of Vibration and Shock | 2016年 / 35卷 / 04期
关键词：
Concrete; Discrete element; Meso-scale model; Particle flow; Penetration;
D O I：
10.13465/j.cnki.jvs.2016.04.026
中图分类号：
学科分类号：
摘要：
The relationship between penetration resistance and velocity of penetration in a projectile penetrating meso-scale concrete model was studied here using the particle flow discrete element method. Concrete aggregates whose size distribution satisfied a grading curve were randomly generated and put in using Monte Carlo method. In order to get the same effective mechanical properties as those of the macro-scale model, the parameters of the micro-scale model were determined by applying the parameter inversion technique in uniaxial compression, splitting tensile, and biaxial compression tests using the particle flow discrete element micromechanical model. The influences of the aggregate, transition layer and mortar 3-phase material microscopic parameters on concrete uniaxial compression stress-strain relation and the effects of diameter of projectiles with flat and conical nose on penetration resistance stress were analyzed. The comparison of the numerical results of resistance stress calculated with the particle flow discrete element micromechanical model and the analytical results based on the cavity expansion theory showed that the discrete element model has good applicability and accuracy. © 2016, Editorial Office of Journal of Vibration and Shock. All right reserved.
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页码：162 / 169and176
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