After contouring on your model > go to measure panel > add a measure group > choose contour (nodal or elemental) > create curves .
If you need to plot the value per loadstep on the same plot, just choose different loadsteps one by one in the subcase list and plot on existing plot to see and compare
Try this,
After contouring on your model > go to measure panel > add a measure group > choose contour (nodal or elemental) > create curves .
If you need to plot the value per loadstep on the same plot, just choose different loadsteps one by one in the subcase list and plot on existing plot to see and compare