Towards stochastic discrete element modelling of spherical particles with surface roughness: A normal interaction law

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• 作者：Y.T. Feng^a ; ^b ; ^{y.feng@swansea.ac.uk} ; T. Zhao^a ; J. Kato^a ; W. Zhou^b
• 关键词：Stochastic discrete element modelling ; Greenwood and Williamson model ; Surface roughness ; Normal contact law
• 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：247-272
• 全文大小：2115 K
• 卷排序：315

文摘

A first attempt to establish a stochastic discrete element modelling framework for particles with surface roughness. Developed a normal contact interaction law based on the Greenwood and Williamson model. Presented two non-dimensional forms of the model that have a substantial impact on the computational efficiency. Proposed a Newton–Raphson iterative procedure to obtain the contact force with surface roughness parameters. Addressed in detail all the key computational components of the procedure. Derived an empirical formula as a new normal interaction law for spheres with surface roughness.