Stress-strain curve during the calendering of and electrode

aloktiwari

Hey

I am simulating the compression of polydisperse particle system in 3D box, where gravity normal direction is periodic. Compressing the plate first for 20 ms and then moving the plate up so electrode can relax.

I am looking at obtaining the stress-strain curve for that, strain for me is the thickness of the electrode.

A bit confused about the calculation of stress -

1. The force acting on the moving plate (fig attached)
   
2. Compressive force on all the particles
3. Interparticle force while particles are in contact( summing up normal and tangential force obtained from contact → normal/tangential force

I am looking for the stress-strain plot from which I can distinguish between the elastic and plastic regime and get the idea of Young's modulus. If anyone is having any idea, please share.

Stephen Cole

Hi, the stress should be the (Total Force on the compressing plate in direction of motion) / surface area of the electrode. You could query Total Contact Normal Force between the material and the compressing plate which would give the same result, and you could also then differentiate between any

Compressive force is the sum of the contact normal forces, total compressive force should be similar in this instance however it doesn't take direction into account so best not to use in a case like this..

Regards

Stephen

Stephen Cole

Hi, the stress should be the (Total Force on the compressing plate in direction of motion) / surface area of the electrode. You could query Total Contact Normal Force between the material and the compressing plate which would give the same result, and you could also then differentiate between any

Compressive force is the sum of the contact normal forces, total compressive force should be similar in this instance however it doesn't take direction into account so best not to use in a case like this..

Regards

Stephen

aloktiwari

Hey Stephen,

Thank you for your suggestion!
I tried the same approach and observed similar behavior when plotting the pressure on the wall due to particles. In this case, the results are comparable, but they may differ in other scenarios.
I appreciate your input on determining pressure based on the force component along the line of motion.

Thanks again!