Abstract
In the present work, a hybrid micro macro-approach was adopted to investigate the material behavior of the A5XXX-O object of the Benchmark 3 of Numisheet2018. Starting from the provided uniaxial stress-strain curve and in house microstructure measurements, a mean field approach, by using the VPSC7c code, was used to perform numerical experiments in order to derive the anisotropic macroscopic behavior of the aluminum alloy.Then, at the macroscale, a constitutive model was built on coupling a non-quadratic yield surface function with a damage model developed in the framework of the continuum damage mechanics. Finally, by using MSC.Marc2017.1, finite element simulations of uniaxial and Nakajima bulging tests were performed with the purpose of obtaining the Fracture Forming Limit Curve for the aluminum alloy under investigation.
Highlights
Sheet metal forming is a challenging topic for process engineering
Several yield surface functions have been proposed [1,2,3] and, successively, developed over the years. Both mean and full-field approaches have been successfully adopted to predict the global response starting from the properties of the constituent single-crystal grains and accounting for the microstructure evolution during the plastic deformation process. Even if these approaches have been successfully implemented in finite element method (FEM) codes, the large number of degrees of freedom required still limits the applicability of such calculations at pure scientific applications
Critical damage and α were chosen by referring to valid values for alloys of the same series, while εf and its standard deviation were calibrated on the experimental uniaxial stress-strain curve in the rolling direction (RD)
Summary
- Research on the Prediction of Mechanical Response to Concrete under Sulfate Corrosion Based on the Grey Theory Yushi Yin, Yingfang Fan and Wang Ning. - Investigation of strength characteristics of aluminum alloy under dynamic tension A D Evstifeev. - Benchmark 3 - Springback of an Al-Mg alloy in warm forming conditions Pierre-Yves Manach, Jérémy Coër, Anthony Jégata Hervé Laurent et al. View the article online for updates and enhancements. View the article online for updates and enhancements This content was downloaded from IP address 85.194.11.116 on 10/08/2018 at 15:05
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