Modelling of Dynamic Strain Aging with a Dislocation-Based Isotropic Hardening Model and Investigation of Orthogonal Loading
نویسندگان
چکیده
Based on experimental results, a dislocation material model describing the dynamic strain aging effect at different temperatures is presented. One and two stage loading tests were performed in order to investigate the influence of the loading direction as well as the temperature influence due to the hardening mechanism. Bergström’s theory of work hardening was used as a basis for the model development regarding the thermal isotropic behavior as well as the Chaboche model to describe the kinematic hardening. Both models were implemented in an in-house FE-Code in order to simulate the real processes. The present paper discusses two hardening mechanisms, where the first part deals with the pure isotropic hardening including dynamic strain aging and the second part involves the influence of the loading direction regarding combined (isotropic and kinematic) hardening behavior.
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