Analysis on Thermo-Mechanical Deformation of Aluminum Alloys Subjected to Thermo-Mechanical Deformation

Abstract

In recent years, a significant amount of studies have been carried out on weight reduction, efficiency and optimization of mechanical structures. For example, car engine developments are directly related to global environmental issues such as global warming. In this field, weight reduction and increase in the efficiency of the engine are especially important factors. It is necessary to investigate the deformation characteristics of aluminum alloys subjected to the thermo-mechanical loading when developing engines. In this paper, a constitutive model explaining the deformation of aluminum alloys subjected to the thermo-mechanical loading is developed. The developed constitutive model separately employs the elastic, plastic and creep models. The effect of parameters used in the constitutive model on the simulation is also discussed. As a result, the constitutive model well explained the stress-strain relations caused by the thermos-mechanical loading except for the stress relaxation at high temperature region. To explain the stress relaxation, the effect of the creep strain on the thermo-mechanical deformation should be increased and the constitutive model should be modified.