Publication: PLASTIC CONTACT MECHANICS AND ITS IMPACT ON DEM SIMULATIONS OF SOLIDS TRANSPORT IN EXTRUDERS

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Title	PLASTIC CONTACT MECHANICS AND ITS IMPACT ON DEM SIMULATIONS OF SOLIDS TRANSPORT IN EXTRUDERS
Authors/Editors*	P.A. Moysey, M.R. Thompson
Where published*	Proceedings of SPE ANTEC
How published*	Proceedings
Year*	2006
Volume	-1
Number	-1
Pages
Publisher	Technomic Publishing Co
Keywords
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Abstract	Research work using the Distinct Element Method (DEM) has identified the potential of a discrete approach for more accurately modeling the motion of plastics solids within a single-screw extruder. Experiments of HDPE particles contacting a steel anvil showed a velocity dependency in their impact behavior, which becomes an important consideration when selecting an appropriate force-displacement model for DEM simulations. In addition, experimental trials have been conducted to examine the bulk motion of solids within an actual single-screw extruder at different screw speeds and barrel temperatures. The implications of velocity-dependency in the contact-displacement models were subsequently examined in a 3-D, non-isothermal DEM simulation for the solids-inflow and solids-conveying zones of a single-screw extruder.