Open Access. Powered by Scholars. Published by Universities.®
Articles 1 - 1 of 1
Full-Text Articles in Mechanical Engineering
Modifications To Johanson's Roll Compaction Model For Improved Relative Density Predictions, Yu Liu
Modifications To Johanson's Roll Compaction Model For Improved Relative Density Predictions, Yu Liu
Open Access Theses
Johanson’s roll compaction model [J.R. Johanson, A rolling theory for granular solids, ASME Journal of Applied Mechanics E32 (1965) 842–848] is modified to improve its predictions of a compacted ribbon’s relative density. Previous work has shown that the maximum roll pressure and ribbon relative density predicted by the Johanson model are not only larger than those predicted from finite element method (FEM) simulations, but also unphysical in some cases. This over-prediction is due to a one-dimensional flow assumption in the Johanson model. Real powder velocity profiles within a roll compactor are non-uniform.
Johanson’s analysis is modified in this work to …