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On the application of a discrete model to the fracture process of cohesive granular materials

机译：离散模型在粘性粒状材料断裂过程中的应用

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摘要

We present a two-dimensional model of heterogeneous cohesive frictional solids where the material structure is idealized by a discrete granular particle assembly. Our discrete model is composed of convex polygons which are linked together by simple beams accounting for cohesive effects. Varying its parameters the model naturally interpolates between a continuous solid state and a discontinuous dry granular state of the material. We performed simulations of the quasi-static uniaxial loading with two different boundary conditions, and shearing of a solid. To provide a geometrical description of the damage state, and of the microscopic fracture events, different characteristic quantities will be introduced and their relevance will be examined. The results obtained from simulations are in satisfactory agreement with experimental observations.
机译：我们提出了一种非均质内聚摩擦固体的二维模型，其中的材料结构是通过离散的颗粒组装而理想化的。我们的离散模型由凸多边形组成，这些凸多边形通过考虑内聚效应的简单梁连接在一起。改变其参数，模型自然可以在材料的连续固态和不连续干颗粒态之间进行插值。我们对具有两个不同边界条件的准静态单轴载荷和固体剪切进行了模拟。为了提供损伤状态和微观断裂事件的几何描述，将引入不同的特征量并检查其相关性。从模拟获得的结果与实验观察结果令人满意。

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