How to determine the bond fracture in BondingV3 Contact Model

Longzhu

Hello EDEM Team,

I downloaded the bondv3 model from the forum, but when I used it I found a little problem

When the “bond status” value is 2，bondforce still exists on contact

But I think when the bonding bond breaks, the bonding force should be 0

 

I would appreciate it if you could help me.

Liu

 

 

 

 

 

 

 

 

 

 

 

RWood

Hi,

As this is the timestep that the bond breaks, I would expect to have a non-zero force value. There is some force that gives rise to the bond breaking and the force is calculated first. I would hope that in the next timestep the bond force is zero though?

Richard

RWood

Richard Wood_20774 said:

Hi,

As this is the timestep that the bond breaks, I would expect to have a non-zero force value. There is some force that gives rise to the bond breaking and the force is calculated first. I would hope that in the next timestep the bond force is zero though?

Richard

That being said, looking at the code it looks like the force should be overwritten to zero when the bond breaks, I think. Either way, what are the values at the next time step?

Update:
So it's a bit of oversight from what I can see in the code. The bond force custom property is only updated  when the bond is still in tact. Once it breaks there's no update to the custom properties. They will disappear once the contact no longer exists, but I think the force value will remain as long as the contact does, judging by what I see in the code.