Can not find the source of the damping coefficient expression of Hertz-Mindlin (no slip) model in the EDEM help

Chandler
Chandler Altair Community Member
edited March 28 in Community Q&A

Hi all,

I am checking the contact model used in the software. But I find the contact model in the EDEM help file, where the damping coefficient is different from all the references listed. I can not understand what is the constant item at the begining of the expression of Hertz-Mindlin (no slip) model. Can anyone explain or give me a reference about this?

Thanks!

image

https://2022.help.altair.com/2022.1/EDEM/index.htm#t=Creator/Physics/Base_Models/Hertz-Mindlin_(no_slip.htm&rhsearch=damping

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Answers

  • Stephen Cole
    Stephen Cole
    Altair Employee
    edited March 28

    Hi Chandler,

    You can find the references for the EDEM models here:

    https://help.altair.com/edem/Bibliography.htm

    Regards

    Stephen

  • Chandler
    Chandler Altair Community Member
    edited March 28
    Stephen Cole_21117 said:

    Hi Chandler,

    You can find the references for the EDEM models here:

    https://help.altair.com/edem/Bibliography.htm

    Regards

    Stephen

    Hi Stephen,

    Thank you for the reply.

    I checked those references, but I didn't find this expression used by EDEM software in those papers. Can you please give a specific reference where the damping coefficient that I attached in the previous question comes from? We need it when we are writing papers about the simulation by EDEM.  

     

    Best

    Chandler

  • Stephen Cole
    Stephen Cole
    Altair Employee
    edited March 28
    Chandler said:

    Hi Stephen,

    Thank you for the reply.

    I checked those references, but I didn't find this expression used by EDEM software in those papers. Can you please give a specific reference where the damping coefficient that I attached in the previous question comes from? We need it when we are writing papers about the simulation by EDEM.  

     

    Best

    Chandler

    Hi,

    You can check:

    Ning, Z., Ghadiri, M.: Incorporation of Rayleigh damping into TRUBAL and determination of the critical time step. (1996)

    or

    Abbaspour-Fard, M. H. ( 2000). “Discrete element modelling of the dynamic behaviour of non-spherical particulate materials.” PhD thesis, University of Newcastle, Newcastle upon Tyne, U.K.

    Regards

    Stephen

  • Chandler
    Chandler Altair Community Member
    edited March 28

    This is helpful. Thank you very much, Stephen.

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