skip to primary navigationskip to content
 

New plastic–adhesive particle contact implementation for DEM

last modified Jul 08, 2014 12:30 PM
A hybrid tabulation-scaling implementation of Thornton and Ning's plastic–adhesive particle contact theory.
New plastic–adhesive particle contact implementation for DEM

Tabulation-scaling in action

A new paper by Jonathan Loh, William Ketterhagen and James Elliott.

Abstract: "Two novel implementations of the Thornton and Ning (TN) plastic–adhesive particle contact theory for use in numerical simulations using the discrete element method (DEM) are presented. They are both in contrast to the original TN implementation, which is indirect and requires an incremental calculation approach. First, a combined Newton–Raphson bisection (NRB) methodology, which calculates exactly the contact force in a non-incremental manner and, second, a tabulation-scaling (TS) implementation which closely approximates the elastic–adhesive unloading curve for a particle contact, resulting in a significant increase in computational speed, are described. The TS implementation is able to reproduce the total energy transferred during elastic–adhesive unloading force curves to within 3% of the exact NRB result. Since TN theory utilizes real material parameters, such as Young's modulus and adhesion energy, the TS implementation is a physically appealing and relatively fast (only slightly slower than Hertzian elastic spheres) method of performing a DEM simulation to predict the behaviour of plastic–adhesive particles. The subroutines for calculation of TN plastic–adhesive force are compatible with the open source DEM package, LIGGGHTS."

Link to the article: http://dx.doi.org/10.1016/j.powtec.2014.05.069

RSS Feed Latest news

Multi-scale modelling of carbon nanotube reinforced crosslinked interfaces

Jan 28, 2017

A new paper by James A. Elliott and his Turkish collaborators Elif Ozden-Yenigun and Canan Atilgan is published in Computational Materials Science

Chirality-independent characteristic crystal length in carbon nanotube textiles measured by Raman spectroscopy

Jan 28, 2017

A new paper by John S. Bulmer, Thurid S. Gspann, Jon S. Barnard and James A. Elliott is published in Carbon.

MML Christmas Dinner 16-12-16

Dec 23, 2016

Wishing you all a Merry Christmas, from the Macromolecular Materials Lab.

High thermal conductivities of carbon nanotube films and micro-fibres and their dependence on morphology

Dec 12, 2016

A new paper by Thurid S. Gspann, Stefan M. Juckes, John F. Niven, Michel B. Johnson, James A. Elliott, Mary Anne White, Alan H. Windle is published in Carbon.

A summer tea time and farewell to Segio

Jul 22, 2016

The MML group had a nice tea time in the department on the hottest day of this summer. Dr Sergio Estravís has successfully finished his current research associate position in this summer. We wish Sergio has a greater success in the future.

View all news