An investigation of the comparative behaviour of alternative contact force models during elastic collisions

Research output: Contribution to journalArticle

Authors

Colleges, School and Institutes

Abstract

In this paper the rebound kinematics obtained using different contact force models are compared for the simple problem of an elastic sphere impacting obliquely with a target wall. It is shown that, for an appropriately calibrated normal spring stiffness and a realistic ratio of the tangential to normal spring stiffnesses, excellent results can be obtained by using a simple linear spring model. The paper also demonstrates that for non-linear contact models, integral equations for the tangential force-displacement cannot be used as the spring stiffness varies during the collision. Finally some comments are provided regarding the limitations of the linear spring model and alternatives are discussed. (C) 2011 Elsevier B.V. All rights reserved.

Details

Original languageEnglish
Pages (from-to)189-197
Number of pages9
JournalPowder Technology
Volume210
Issue number3
Publication statusPublished - 1 Jul 2011

Keywords

  • Discrete element method, Oblique impact, Contact interaction laws