Abstract
The main difficulty presented by the simulation of a global process that includes different forming stages is the correct characterization of the material state at the end of each of these stages, which in turn, are the initial point of the following process. Hardening variables are capable of characterizing the state of the material, which, after a plastic transformation, varies according to the direction of the solicitation and its intensity. The present work carries out an analysis of the influence in the election of the hardening rule used in the behavior law, comparing the most used approach. For a work piece solicited by combined efforts in multiple stages, results are obtained by numerical simulation. A correct choice will allow obtaining reliable predictions, not the solicitations but also to the final geometry and the dissipated energy in the global process, allowing an eventual optimization of such process.
Highlights
The current industrial context encourages the optimization of resources in production processes [1]
This work proposes to study the influence of the hardening rule in order to follow the history of the evolution of the thermodynamic state variables that characterizes the metal during the global manufacturing process
The analysis suggest that the anisotropy induced during strain hardening has effects that should not be neglected in a global simulation of a mechanic part manufacturing process
Summary
The current industrial context encourages the optimization of resources in production processes [1]. The study of the interactions of different processes in a production line continues to be a challenge, as they have not been well characterized in a global manufacturing process chain. This work proposes to study the influence of the hardening rule in order to follow the history of the evolution of the thermodynamic state variables that characterizes the metal during the global manufacturing process. Qualitative and numerical examples are carried out by using different hardening rules, in order to evaluate differences in the prediction of the metal response for the same loading history. This difference has implications from both the. The analysis suggest that the anisotropy induced during strain hardening has effects that should not be neglected in a global simulation of a mechanic part manufacturing process
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