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[Weidong]

Dear all,

I am trying to simulte a compressive case based on DES in LS DYNA. However, it seems there is no bond force between DES in my case.

I have set the *DEFINE_DE_BOND in my case, while it seems this keyword does not work.

Enclosed please find my case.

Looking forward to your help. Thanks in advance.

Best regards,

Weidong

twobox.txt

[Aniket]

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[Weidong]

Hi,
I attached my model for compressive simulation and related bond parameters (unit: mm) for DEM.
However, it seems there is no bond force between the discrete particle.
Looking forward to your help.
Best regards Weidong

[Ram Gopisetti]

do define the control DEM card and define Binary_DEMFOR and try again, for further reference on using DEM refer to following guide
cheers, Ram

[Weidong]

Thanks so much for your suggestions and I am sorry for the late response.
According to to your suggestions, I define the control DEM card and define Binary_DEMFOR and try again. However, the results does not changed.
DES particles gradually spread out, it seems that there is no bond force between particles, as shown bellow.
Looking forward to your help.
All the best
Weidong