In a first structural analysis the residual stresses, after cooling down in the manufacturing process, was calculated. The residual stress went into the fatigue analysis as the mean stress of a working cycle. The roller has two planes of symmetry, and the attached figure shows the distribution of residual stress for part of the model.

• Cooling by 700 °C from a state of "no strength" in the steel i.e. yield stress close to 0
• Materials: Steel and WC-Co
• Viscoelastic creep simulation by a Norton type law