|About this Abstract
||NUMISHEET 2021: The 12th International Conference on Numerical Simulation of 3D Sheet Metal Forming Processes
||A 3D Material Model for Finite Element Analysis of Aluminium Extrusions for Crash Applications
||Guillaume D'Amours, Jean-François Béland, Nick Parson
|On-Site Speaker (Planned)
This paper presents the development and validation of a 3D material model for finite element analysis of extruded aluminium for crash applications. It is already well established that 6XXX aluminium extrusions exhibit a significantly more anisotropic behavior than aluminium sheet in terms of plastic deformation and failure. To accurately predict the large variations of stress and strain depending on the load orientation with respect to the extrusion direction, a new material model was developed based on Yoshida yield functions. The model also includes phenomenological damage evolution which allows initiation of the damage at the plastic instability followed by an increase with plastic strain up to failure. This failure model was calibrated for complex states of stress and strain paths. The accuracy of the new material model was evaluated with lateral crush experiments where the profile deformation involves complex transverse folding behavior to be captured with the plastic flow rule.
||Definite: At-meeting proceedings