Implementation of a material model under consideration of ageing in a commercial FEA software

Mohsen Mohammad Aghaei

Research output: ThesisMaster's Thesis


High demands are placed on the material model when simulating engine components consisting of age-hardening materials that are subject to thermal-mechanical stresses and have a uniform temperature distribution. A model that takes into account the effects of aging on the material characteristics over the whole temperature profile is needed to simulate such load cases. An enhanced physical-based ageing model that takes into consideration various ageing and test temperatures is presented in this study. Under uniaxial strain-controlled isothermal loading conditions and temperatures ranging from room temperature up to 250°C, the improved model was fitted to data from the Al-Si-Mg-Cu alloy. Contrary to the previous models, this model represents much better accuracy at temperatures higher than 200°C. This updated model can be used to simulate thermomechanical fatigue testing on a cycle-by-cycle basis.
Translated title of the contributionImplementierung eines Materialmodells unter Berücksichtigung der Alterung in eine kommerzielle FEA-Software
Original languageEnglish
Awarding Institution
  • Montanuniversität
  • Winter, Gerhard, Supervisor (internal)
  • Grün, Florian, Co-Supervisor (internal)
Award date30 Jun 2023
Publication statusPublished - 2023

Bibliographical note

no embargo


  • Engine components
  • Age-hardening
  • Material model
  • Ageing model
  • Al-Si-Mg-Cu alloy
  • Thermal-mechanical stresses
  • Cyclic load
  • Abaqus CAE

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