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• W2922202964 startingPage "432" @default.
• W2922202964 abstract "The discrete element method (DEM) typically uses an explicit numerical integration scheme to solve the equations of motion. However, like all explicit schemes, the scheme is only conditionally stable, with the stability determined by the size of the time step. Currently, there are no comprehensive techniques for estimating appropriate DEM time steps when a nonlinear contact interaction is used. It is common practice to apply a large factor of safety to these estimates to ensure stability, which unnecessarily increases the computational cost of these simulations. This work introduces an alternative framework for selecting a stable time step for nonlinear contact laws, specifically for the Hertz-Mindlin contact law. This approach uses the fact that the discretised equations of motion take the form of a nonlinear map and can be analysed as such. Using this framework, we analyse the effects of both system damping and the initial relative velocity of collision on the critical time step for a Hertz-Mindlin contact event between spherical particles." @default.
• W2922202964 created "2019-03-22" @default.
• W2922202964 creator A5002185854 @default.
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• W2922202964 date "2019-03-28" @default.
• W2922202964 modified "2023-10-17" @default.
• W2922202964 title "Critical time step for DEM simulations of dynamic systems using a Hertzian contact model" @default.
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• W2922202964 doi "https://doi.org/10.1002/nme.6056" @default.
• W2922202964 hasPublicationYear "2019" @default.
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