Contact models


	*`Contact models`*

The following contact models are available for use with PFC

	Burger's Model
	This model simulates creep mechanisms, in which the Kelvin model and the Maxwell model are connected in series in both the normal and shear directions, respectively, at a contact point. The required parameters of the model are stiffness and viscosity in the Kelvin section and similar parameters in the Maxwell section. More detailed information (zip file) Download UDM
	Hysteretic Damping Model
	This model incorporates hysteretic energy dissipation within a linear contact law at a contact point, in which normal stiffness on unloading is greater than that on loading. This damping model is realistic for simulations dealing with particles collisions, such as Ball Mills and Screw Conveyors. More detailed information (zip file) Download UDM
	Sea Ice Model
	This model incorporates a elasto-plastic behavior under compression visco-elasto-plastic behavior under tension and was developed for the modelling of sea ice More detailed information (zip file) Download UDM
	Elastic-Inelastic Power Function Model
	The elastic-inelastic power function model consists of a linear elastic process, an inelastic process and a power function process. This model can be used to simulate the energy loss due to collisions, such as rockfall. More detailed information (zip file) Download UDM

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General information on Itasca can be found on our website.
For more detailed information on our codes please visit the following pages on our website:
[FLAC] [FLAC3D] [UDEC] [3DEC] [PFC2D] [PFC3D]

For further information please contact: Itasca Consultants GmbH, Leithestrasse 111, 45886 Gelsenkirchen, Germany.