Comparison of constitutive laws on the modeling of thermo-viscoplastic behaviour of an aluminum alloy
Résumé
The accuracy of simulation result depends greatly on the implemented hardening law. An appropriate hardening model should be able to describe the coupling effects of the strain, strain rate and temperature on the material flow stress. Based on the stress-strain curves obtained from uniaxial tensile tests, two different hardening models (power law and saturation) are proposed to describe AA5086 flow stresses under different temperatures (20, 150 and 200°C) and tensile speeds (1, 10 and 100 mm*s-1). The correlation results are compared to experimental data and the roles of the hardening models in predicting the material flow stress are compared and discussed.
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_01_Comparison_of_constitutive_laws_on_the_modeling_of_thermo-viscoplastic_behaviour_of_an_aluminum_alloy.pdf (93.01 Ko)
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