LAUSR

Abstract A constitutive material model, which predicts the material behaviour of an Al–Si–Mg–Cu alloy under thermomechanical load, is proposed. Moreover, an ageing model is used to simulate the ageing behaviour, which also affects the hardening parameters. A new strategy for determining the material parameters is proposed, and a new testing concept for investigating the ageing properties of materials is presented. Thermomechanical fatigue tests are used to validate the material model. The results of the simulations show that it is possible to determine the material parameters based on low-cycle fatigue, relaxation, and ageing tests such that a cycle-by-cycle simulation of thermomechanical fatigue tests is possible. Finally, a comparison of the simulation and test results show a good agreement.