Bjorn,
The initial stress exists because the temperature load. If the temperature load is removed, then the state of initial stress relaxes. Your restart analysis will need to read the temperature load just as it did for the initial stress analysis to ensure the state of thermal stress is maintained.
Pat Tessaro, P.E.
Autodesk Inc.
Pat Tessaro, P.E.
Premium Support Specialist – Simulation
Autodesk, Inc.
6425 Living Place
Suite 100
Pittsburgh, PA 15206