首页|A modified discrete element method for concave granular materials based on energy-conserving contact model
A modified discrete element method for concave granular materials based on energy-conserving contact model
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The development of a general discrete element method for irregularly shaped particles is the core issue of the simulation of the dynamic behavior of granular materials. The general energy-conserving contact theory is used to establish a universal discrete element method suitable for particle contact of arbitrary shape. In this study, three dimentional (3D) modeling and scanning techniques are used to obtain a trian- gular mesh representation of the true particles containing typical concave particles. The contact volume- based energy-conserving model is used to realize the contact detection between irregularly shaped par- ticles, and the contact force model is refined and modified to describe the contact under real conditions. The inelastic collision processes between the particles and boundaries are simulated to verify the ro- bustness of the modified contact force model and its applicability to the multi-point contact mode. In addition, the packing process and the flow process of a large number of irregular particles are simu- lated with the modified discrete element method (DEM) to illustrate the applicability of the method of complex problems.
Discrete element methodConcave shapesEnergy conservationContact volume-based contact modelVolumetric mesh representation
Ting Qiao、Ji Li、Shunying Ji
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State Key Laboratory of Structural Analysis for Industrial Equipment,Dalian University of Technology,Dalian 116024,China
National Key Re-search and Development Program of China国家自然科学基金国家自然科学基金
NETL
NSTL
万方数据
维普
