Precision tube production : influencing the eccentricity, residual stresses and texture developments : experiments and multiscale simulation

Abstract : The main and foremost aim of this work was to optimize the standard tube drawing process in a way that the eccentricity can be controlled, which can be the reduction or increase of eccentricity. For this reason, tilting and/or shifting was introduced to the die and/or tube, respectively. Different tubes of varied materials, such as copper, aluminum, brass, and steel with different dimensions were investigated by various tilting angles, shifting values, or combination of tilting and shifting and their effect on the eccentricity was analyzed. Along influencing and controlling the eccentricity, the evolution of the residual stresses and texture due to the introduced tilting and /or shifting were investigated. The other aim of this work was to develop a universal FEM model, which can get the required or desired input parameters, which can be material-related or process related or both, and perform the simulation of the user-defined metal forming process and therewith analyze more complex situations. In this regard, a simulation model was developed using a multiscale simulation method with Integrated Computational Material Engineering approach.
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Farzad Foadian. Precision tube production : influencing the eccentricity, residual stresses and texture developments : experiments and multiscale simulation. Physics [physics]. Université de Strasbourg; Technische Universität Clausthal (Allemagne), 2018. English. ⟨NNT : 2018STRAE003⟩. ⟨tel-02155136⟩

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