Macro-meso Scale Coupling Modeling and Simulation of Surface Roughening in Aluminum Alloy Tube Bending

doi:10.3901/JME.2021.22.209

Abstract

Abstract: The conventional Arrhenius constitutive model is limited by its low accuracy in predicting flow stress. The phenomenological Arrhenius constitutive model coupling true strain is constructed for superalloy Inconel 617B. Furthermore, the BP-ANN (Back propagation-artificial neural network) constitutive model is constructed. The results show that the flow stress of the alloy is sensitive to the deformation temperature, deformation rate and true strain. The relative error (δ) of the flow stress predicted by the phenomenological model is 9.020% and the correlation coefficient (R) is 0.981 4, while the relative error of the BP-ANN model (the optimum structure is determined as 3×20×1) is only 1.527% and R reaches 0.998 9. The flow stress of Inconel 617B is more accurately predicted by the BP-ANN model. Using BP-ANN to construct constitutive model can improve the prediction accuracy, which can describe the constitutive relationship between flow stress and deformation parameters of superalloy Inconel 617B more rationally.

Key words: aluminum alloy tube, bending forming, surface roughening, crystal plasticity finite element, macro-meso scale coupling modeling

CLC Number:

TG386

GUO Xiaoxi, LI Heng, FENG Zhenyong, ZHANG Duo. Macro-meso Scale Coupling Modeling and Simulation of Surface Roughening in Aluminum Alloy Tube Bending[J]. Journal of Mechanical Engineering, 2021, 57(22): 209-217.

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