The Relative Wear model

The Relative Wear model is a way of identifying regions of high impact (normal) and abrasive (tangential) wear on the equipment within a simulation.

It is calculated based on the relative velocity and associated forces between the bulk material and the equipment. This model provides you with data to indicate regions in which wear is taking place. While it provides quantitative values for comparison between two or more design iterations, it does not determine an explicit material removal rate.

The four relative wear properties are Normal Cumulative Contact Energy, Tangential Cumulative Contact Energy, Normal Cumulative Force and Tangential Cumulative Force. Normal and Tangential Energy measure the cumulative energy due to material impacting and sliding respectively. 

where V_nis the normal relative velocity and is negative in a loading situation.

where V_tis the tangential relative velocity.

when

and

The F_nc is the cumulative peak forces of the different contacts occurring on a geometry element. 

The tangential cumulative force is dependent on the Time Step selected. The smaller the Time Step, the bigger the cumulative force.

Interaction	Configurable Parameters	Position
Particle to Particle	None	Last
Particle to Geometry	Record Relative Wear (On/Off).The Relative Wear model is a way of identifying regions of high impact (normal) and abrasive (tangential) wear on the equipment within a simulation. It is calculated based on the relative velocity and associated forces between the bulk material and the equipment. This model provides you with additional data to indicate regions in which wear is taking place. Whilst it provides quantitative values for comparison between two or more design iterations, it does not determine an explicit material removal rate.	Last

The Relative Wear model does not take into account the size of each element so a large variation in mesh sizing might produce unexpected or confusing results.