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EDEM parameters for cutting process

Hi experts!

I'm using EDEM to simulate a cutting process of grain. I imported some geometries of the cutting drum. There is guiding plate for the generated particles, a geometry to represent the cutting knife and a cutting rotor to pull the grain over the blade.

I don't know how to set the simulation parameters correctly for cutting particles. Shall I select INTERACTION: particle to geometry combined to which base model?

Thanks for your help.

Greetings,

Philipp

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v2020.0

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Stephen Cole

Hi Philipp,

The particle-geometry interaction can be Hertz-Mindlin or Hertz-Mindlin with JKR (if the particles are sticky) however by default it shouldn't need any extra physics. The cutting geometry should provide a force on the particles which can break the bonds if high enough, there is the option to include additional custom physics in the EDEM API if required.

The material behaviour for the bondingV2 is most likely to influence the cutting, there iis a tutorial on bonding here:

https://community.altair.com/community?id=kb_article_view&sysparm_article=KB0037194

And some more in-depth material on the different physics models here:

https://learn.altair.com/course/view.php?id=148

Regards

Stephen

Philipp Mueller

Hi Stephen,

thanks for your quick, comprehensive and helpful answer. I read the attached tutorial and implemented the advise.

One short question:

The force that acts from geometry is set in interaction: particle to geometry as the "surface energy", right?

Thanks, greetings

Philipp

Stephen Cole

Hi Stephen,

thanks for your quick, comprehensive and helpful answer. I read the attached tutorial and implemented the advise.

One short question:

The force that acts from geometry is set in interaction: particle to geometry as the "surface energy", right?

Thanks, greetings

Philipp

Hi Philipp,

The force is based on a combination of factors, in this case the overlap (normal or tangential) is used in the Hertz-Mindlin calculation which gives an elastic force. This is for dry granular materials. The Surface Eneryy is a part of the JKR calculation of the model which adds in a cohesive component to the force.

Regards

Stephen

Philipp Mueller

Hi Philipp,

The force is based on a combination of factors, in this case the overlap (normal or tangential) is used in the Hertz-Mindlin calculation which gives an elastic force. This is for dry granular materials. The Surface Eneryy is a part of the JKR calculation of the model which adds in a cohesive component to the force.

Regards

Stephen

Hi Stephen,

unfortunately I still have problems to parameterize the simulation for my bachelor thesis correctly.
Is there possibly the possibility of a short personal exchange?
With the bonding models, I unfortunately do not yet manage to create a flexible, cuttable simulation material.
In the videos I have unfortunately not yet found any help on the subject of API use.

Thanks for your help,

Regards,

Philipp

Stephen Cole

Hi Stephen,

unfortunately I still have problems to parameterize the simulation for my bachelor thesis correctly.
Is there possibly the possibility of a short personal exchange?
With the bonding models, I unfortunately do not yet manage to create a flexible, cuttable simulation material.
In the videos I have unfortunately not yet found any help on the subject of API use.

Thanks for your help,

Regards,

Philipp

Hi Philipp,

I'll send you a direct mail and we can discuss.

Regards

Stephen