Hi there,
During a scratch simulation which consist of conical tip and flat specimen, should i update ensemble(nve/sphere) after increasing force statement of tip ?
I would like to simulate a scratch simulation in micro scale, which tip and substrate make a contact and slid (constant velocity).
And during the sliding process i want to increase a normal load for tip ( E.G, 1 mN to 100 mN).
The particles are bonded for tip and specimen, but there is no bonding between tip and substrate.
So every 100000 steps, i set increase i mN.
But the i'm curious should i re-define a ensemble when the force condition differed
1) Some of document said "nve" is a energy conservative method. in that case, i guess if the particle movement are updated based on
energy state. i should update NVE every increase of normal force. is that reasonable ?
2) But when i travel a code. in a NVE/sphere code, there is no part related to the energy conservation.
Just update particle state which include velocity and position based on force and timestep. (I can't sure it's right or not)
I guess in that case, i don't need to update even if i increased normal load during simulation.
If somebody has any idea about ensemble for DEM, could you give me any advise ?
I really appreciate about that.
Thank you
have a nice day !!