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

作者：Thornton Colin; Cummins Sharen J^*; Cleary Paul W

来源：Powder Technology, 2011, 210(3): 189-197.

DOI：10.1016/j.powtec.2011.01.013

• Oblique impact
• Contact interaction laws
• Discrete element method

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.

• 出版日期2011-7-10
• 单位CSIRO