Hi,

I am trying to simulate a transient thermomechanical model of a roller test rig to get heat generation and stress analysis caused by load, slip and friction coefficient. Model consists of 2 rollers- Hollow Roller and Counter Roller. Load is applied to Counter Roller. I have defined 4 steps- loading of counter roller, acceleration of both rollers to their respective velocities, Rolling of both rollers at their achieved velocity and braking of counter roller. I am using Coupled Temp-Displacement as step. All the material properties are elastic. Nlgeom is on in every step.

I want to set temperature of some nodes to 25 degree celsius at the start of step 3 (rolling) and want Abaqus to self compute temperatures for the remaining part of simulation, irrespective of temperatures attained by nodes in previous 2 steps. However, in the ''Predefined Fields'', I can only define temperatures in the initial step not in the rolling step.

How can I define temperature to my selected nodes in the rolling step of my simulation such that temperatures of those nodes get computed automatically for the remaining simulation?

PFA- Screenshot of my model