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本文的主要目的是验证梁－颗粒细观模型在模拟混凝土和砂岩类颗粒增强复合材料连续破坏过程的有效性。文中首先介绍了梁－颗粒细观数值模型的基本原理，然后给出了由细钢丝粘结成的正方体试件的单轴抗压实验结果，最后用梁－颗粒细观模型对物理实验进行了数值模拟。研究结果表明，物理实验和数值模拟所得到的试件破坏模式和荷载－位移曲线，两者基本一致。从而初步证明了梁－颗粒细观数值模型是模拟颗粒增强复合材料破坏过程，以及解释其损伤机理的一个有效工具。
The main purpose of this paper is to verify the effectiveness of the beam-particle mock-up model in the continuous failure process of simulated concrete and sandstone particle reinforced composites. In this paper, the basic principle of the numerical model of the beam - grain is introduced firstly. Then the uniaxial compression test results of the square specimen bonded by the thin steel wire are given. Finally, the physical experiment is carried out by the beam - Numerical Simulation. The results show that both the failure mode and the load-displacement curve obtained by physical experiment and numerical simulation are basically the same. It is preliminarily proved that the numerical model of the beam - grain is an effective tool to simulate the failure process of the particle reinforced composite and to explain its damage mechanism.