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Particle Force Response

Good day,

Please, I am doing a three-point bending test. I have everything defined correctly in EDEM. I am using a meta-particle and a fibre-bending model. During my simulation, the punch bends the particle. After the simulation, I plot the total force of the particle against time. However, the particle force is almost zero.

Please, I was wondering what could be the reason why the particle is not showing a force response?

Thank you.

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Stephen Cole

Hi Johnson,

Which force measure are you using for the particle? If you plot meta-particle total force this would be the sum of all the forces on the particle.

So this would include the force due to the punch, and also any reaction forces from the supports. I would expect the Total Force to be close to 0 if it's not a very dynamic case.

However if you plot the Particle-Punch Contact Force or the Total Force on the Punch only, then you would see the component of the force required to deflect the meta-particle, which I think is what you would want in this case.

Regards
Stephen

Johnson

Hello, Stephen,

Thank you for the response. If the meta-particle is selected, there is no primary attribute for the total particle in the EDEM analyst.

Also, the total force on the punch is almost zero as well. I have attached the EDEM file.

Please, if you can help me look into it. Thank you.

EDEM.zip

Stephen Cole

Hi Johnson,

The deflection of the stalk is very slight, I would not expect much force to be required to deflect the stalk such a small amount.

If you increase the stalk stiffness by an order of magnitude in the bond model you do see a significant increase in Total Force on the punch. This does require a lower time-step.

Regards

Stephen