EDEM-Archard Wear-how to calculate the wear constant for a equipment material?

Deepak Achar_21916

I wanted to understand on how to arrive at the value for "Wear constant" under "Archard wear model parameter values" for a particular equipment material (in my case it is steel and carbide).
I was running a simulation for mixing of Iron ore, coke and limestone. I wanted to know the deformation happening on the mixer blades and I went ahead with using Archard wear as a built-in source in physics section and when the simulation completed  the blades were deformed abnormally, I wasn't sure about the wear constant to use so I went ahead with 2e-08 Pa^-1 just to see how the deformation happens. Help on this is much appreciated. Thanks. 

Stephen Cole

Hi Deepak,

The wear constant in EDEM is K/H where K is a dimensionless constant and H is the Vickers hardness (Pa) of the surface.

For H I would recommend picking this from literature values and calibrating K against any known experimental data.  It looks like the deformation is excessively high with the values set in the image, typically in EDEM if the simulation run time is in a few seconds and the wear occurs over a large time period you can increase the wear constant to account for longer time periods however I would recommend in your case decreasing to allow for more realistic deformations.

Here are some references which could be used for experimental testing:

 

ASTM International, G02 Committee. 2017. Test Method for Scratch Hardness of Materials Using a Diamond Stylus. West Conshohocken, PA. https://doi.org/ 10.1520/G0171-03R17.

Schramm, F., Kalácska, Pfeiffer, V., Sukumaran, J., De Baets, P., & Frerichs, L. (2020). Modelling of abrasive material loss at soil tillage via scratch test with the discrete element method. Journal of Terramechanics, 91, 275–283. https://doi.org/10.1016/j.jterra.2020.08.002

ASTM G65-00: Standard test method for measuring abrasion using the dry sand/rubber wheel apparatus. ASTM International. Vol. 03.02, August 2005.

Perazzo, F., Löhner, R., Labbe, F., Knop, F., & Mascaró, P. (2019). Numerical modeling of the pattern and wear rate on a structural steel plate using DEM. Minerals Engineering, 137(July 2018), 290–302. https://doi.org/10.1016/j.mineng.2019.04.012

 

 

 

Stephen Cole

Hi Deepak,

The wear constant in EDEM is K/H where K is a dimensionless constant and H is the Vickers hardness (Pa) of the surface.

For H I would recommend picking this from literature values and calibrating K against any known experimental data.  It looks like the deformation is excessively high with the values set in the image, typically in EDEM if the simulation run time is in a few seconds and the wear occurs over a large time period you can increase the wear constant to account for longer time periods however I would recommend in your case decreasing to allow for more realistic deformations.

Here are some references which could be used for experimental testing:

 

ASTM International, G02 Committee. 2017. Test Method for Scratch Hardness of Materials Using a Diamond Stylus. West Conshohocken, PA. https://doi.org/ 10.1520/G0171-03R17.

Schramm, F., Kalácska, Pfeiffer, V., Sukumaran, J., De Baets, P., & Frerichs, L. (2020). Modelling of abrasive material loss at soil tillage via scratch test with the discrete element method. Journal of Terramechanics, 91, 275–283. https://doi.org/10.1016/j.jterra.2020.08.002

ASTM G65-00: Standard test method for measuring abrasion using the dry sand/rubber wheel apparatus. ASTM International. Vol. 03.02, August 2005.

Perazzo, F., Löhner, R., Labbe, F., Knop, F., & Mascaró, P. (2019). Numerical modeling of the pattern and wear rate on a structural steel plate using DEM. Minerals Engineering, 137(July 2018), 290–302. https://doi.org/10.1016/j.mineng.2019.04.012

 

 

 

Deepak Achar_21916

Hi Stephen,

Thanks a lot for the answer and for the recommendation, am sure this does makes my work a lot more easier and lot more practical now.