Archard Wear

The Archard Wear model extends any Base Model to give an estimation of wear depth for geometry surfaces. The model is based on work by John F Archard (Archard 1953) and uses the idea that the amount of material removed from the surface will be proportional to the frictional work done by particles moving over the surface.

 

The Archard equation is given as:

 

 

Where Q is the volume of material removed, dt is the tangential distance moved and W is a wear constant originally:

 

 

Where K is a dimensionless constant and H is a hardness measure of the softest surface. This was reduced to a single wear constant for ease of use in EDEM.

 

As the equation predicts a volume of material to be removed this is rearranged to give a depth per element in EDEM:

 

 

The input to EDEM is the wear constant W with units 1/Pa.

 

Interaction	Configurable Parameters	Position
Particle to Geometry	Assign a Wear Constant value for each Equipment Material-Particle interaction.     Record Relative Wear (On / Off), see Hertz-Mindlin.	Last

 

EDEM also offers the option to deform geometry according to the quantitative results given by the Archard Wear model. To enable this feature select the “Enable Deformation” option in the parameter values GUI shown below. Please not that geometry deformation is currently only available on the CPU.