Abstract
The simulation of the stretch forming of A5182-O aluminum alloy sheet with a spherical punch is performed using the crystal plasticity (CP) finite element method based on the mathematical homogenization theory. In the simulation, the CP constitutive equations and their parameters calibrated by the numerical and experimental biaxial tensile tests with a cruciform specimen are used. The results demonstrate that the variation of the sheet thickness distribution simulated show a relatively good agreement with the experimental results.
Highlights
In order to improve the accuracy of finite element simulations of sheet metal forming processes, it is essential to check whether the material models and parameters used in the simulations adequately describe the plastic deformation behavior of sheet metals under a multiaxial stress state or not
The results demonstrated that numerical biaxial tensile test (NBT) enables us to calibrate the material models and parameters by comparing the contours of equal plastic work calculated by NBT with those measured by the biaxial tensile test using a cruciform specimen [2]
The crystal plasticity finite element (CPFE) simulation of the stretch forming of the A5182-O aluminum alloy sheet with a spherical punch is presented
Summary
In order to improve the accuracy of finite element simulations of sheet metal forming processes, it is essential to check whether the material models and parameters used in the simulations adequately describe the plastic deformation behavior of sheet metals under a multiaxial stress state or not. The authors have developed the numerical biaxial tensile test (NBT) based on the crystal plasticity finite element (CPFE) method and the mathematical homogenization method [1]. The results demonstrated that NBT enables us to calibrate the material models and parameters by comparing the contours of equal plastic work calculated by NBT with those measured by the biaxial tensile test using a cruciform specimen [2]. The CPFE simulation of the stretch forming of the A5182-O aluminum alloy sheet with a spherical punch is presented. In the forming simulation, the data of crystallographic texture in the sheet measured experimentally and the material parameters calibrated by NBT are used. In order to verify our methodology, the results of the forming simulation are compared with the corresponding experimental results
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