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Modeling the particle breakage by using combined DEM and SBFEM


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Luo, T, Ooi, ET, Chan, AHC ORCID: 0000-0003-0042-8448 and Fu, SJ 2017 , 'Modeling the particle breakage by using combined DEM and SBFEM', in X Li and Y Feng and G Mustoe (eds.), Proceedings of the 7th International Conference on Discrete Element Methods , Springer, Singapore, pp. 281-288 , doi: 10.1007/978‐981‐10‐1926‐5_31.

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A novel computational method is developed in this study through the coupling of the discrete element method (DEM) and the scaled boundary finite element method (SBFEM).The objective of the developed technique is to model the particle breakage phenomenon in granular materials. This method models individual grains as single star-convex arbitrary sided polygons. The DEM is used to resolve the dynamics of each grain whereas the SBFEM is used to determine its corresponding stress state after a DEM analysis. The flexibility of both the SBFEM and DEM enable the grains to be formulated on arbitrary sided polygons so that the morphology of each grain to be replicated using only a single polygon. Grain breakage condition is determined if the stress state in a polygon satisfies a mechanically driven criterion e.g., the Hooke-Brown criterion is used. Once the breakage condition is detected, the resulting grain is split into two separate polygons. The resulting new polygons are directly model led by the DEM and SBFEM without any change to the formulation. The feasibility of the developed method is demonstrated by a numerical example.

Item Type: Conference Publication
Authors/Creators:Luo, T and Ooi, ET and Chan, AHC and Fu, SJ
Keywords: discrete element method, scaled boundary finite element method, particle breakage, granular soils
Journal or Publication Title: Proceedings of the 7th International Conference on Discrete Element Methods
Publisher: Springer
DOI / ID Number: 10.1007/978‐981‐10‐1926‐5_31
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