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A novel graph-based 3D breakage method for angular particles with an image-based DEM
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DOI：10.1016/j.ijrmms.2024.105640.png)
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Abstract
En 中文
Particle breakage has been investigated extensively in a variety of applications. The Discrete Element Method (DEM) is commonly used to investigate breakage. However, it has limitations in accurately representing the natural morphology of particles. Additionally, existing techniques for simulating breakage of irregular particles have mainly focused on splitting and chipping mechanisms, simplifying fractures as straight lines or flat planes. In this paper, we introduce a novel 3D breakage model that incorporates all breakage mechanisms (splitting, chipping, and fragmentation). To determine fracture surfaces, we apply Dijkstra's algorithm to the particle's stress field to find the fracture surface(s). After defining the fracture surface(s), the intersection set operations and 26 connected components labeling techniques are employed to generate multiple sub-grains. We apply our method to a compression test on a three-particle system to demonstrate its effectiveness in modeling breakage. We conduct quantitative analyses on grain count, mass, displacement, kinetic energy, rotational motions, and inter-particle forces. Our findings indicate that particle displacement is a significant factor in breakage, while the influence of rotational motion should not be overlooked. Furthermore, our results capture different phases of breakage and rotational movements.
Keywords:
Particle breakage
Discrete element method (DEM)
3D breakage model
Fracture surfaces
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