In modern chemical engineering production, numerous elastoplastic materials, often formed into agglomerates, frequently undergo plastic deformation and rupture. Understanding how these materials behave under different conditions is crucial for improving manufacturing processes and material design. In this work, an elastoplastic beam bond model for discrete element method (DEM) simulation was developed, in which a yield criterion is introduced into Timoshenko beam bond method. The model can simulate not just the initial elastic (stretchy) behavior of the materials but also their plastic (permanent) deformation behaviors. The model was applied to central collision of two agglomerates, agglomerate uniaxial compression, and agglomerate‐wall impact cases. It is shown that the updated model could predict the behavior of materials that undergo permanent changes under stress, compared to previous models that only considered elastic behaviors. This could enable more accurate simulations of particulate materials and aid in better process design.

中文翻译：

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用于可变形材料和破损行为的 DEM 仿真的弹塑性梁粘接模型


在现代化工生产中，许多弹塑性材料经常形成团聚体，经常发生塑性变形和破裂。了解这些材料在不同条件下的行为对于改进制造工艺和材料设计至关重要。在这项工作中，开发了一种用于离散元法 （DEM） 仿真的弹塑性梁粘合模型，其中在 Timoshenko 梁粘合法中引入了屈服准则。该模型不仅可以模拟材料的初始弹性（拉伸）行为，还可以模拟它们的塑性（永久）变形行为。该模型应用于两个团聚体的中心碰撞、团聚体单轴压缩和团聚体-壁冲击情况。结果表明，与以前仅考虑弹性行为的模型相比，更新后的模型可以预测材料在应力下发生永久性变化的行为。这可以实现更准确的颗粒材料仿真，并有助于更好的工艺设计。