A generic contact detection framework for cylindrical particles in discrete element modelling

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• 作者：Y.T. Feng^a ; ^{y.feng@swansea.ac.uk} ; K. Han^b ; D.R.J. Owen^a
• 关键词：Discrete element method ; Cylindrical particle ; Axi-symmetry ; Non-spherical shape ; Contact normal ; Contact point
• 刊名：Computer Methods in Applied Mechanics and Engineering
• 出版年：2017
• 出版时间：1 March 2017
• 年：2017
• 卷：315
• 期：Complete
• 页码：632-651
• 全文大小：5330 K
• 卷排序：315

文摘

Develops a generic framework for detecting contact between cylindrical particles based on a full exploitation of the axi-symmetrical property of cylinders. Derives a four-parameter based local representative system to describe the spatial relationship between two cylinders. The 3D cylinder–cylinder intersection problem is reduced to a series of 2D circle–ellipse intersections. Proposes a two-stage contact detection scheme in which no-overlap contact pairs are identified in the first overlap check stage. The actual overlap region is determined in the second resolution stage and represented by two schemes. Develops two theorems that establish a fundamental relationship between the contact point and contact normal of two contacting cylinders. These theorems are valid not only for cylinders, but also for any axi-symmetrical shapes and their combinations.