Modelling of magnesium sheet forming operations

Steglich, D.; Tian, X.
May 2013
AIP Conference Proceedings;May2013, Vol. 1532 Issue 1, p714
Academic Journal
Numerical investigations of sheet forming processes of the magnesium alloy AZ31 are performed based on a robust phenomenological constitutive model. This model captures relevant characteristic mechanical features like tension-compression asymmetry, anisotropy and differential hardening observed in magnesium alloys. Temperature and viscosity effects are included, which become relevant at temperatures above room temperature. The constitutive model has been implemented in a commercial finite-element code. Parameters of the model are determined using a minimisation scheme. The predictive capabilities of the calibrated model are demonstrated through thermo-mechanically coupled FE simulations of a sheet forming process selected as the NUMISHEET Benchmark 2011. Case studies reveal the effect of the plastic potential chosen on macroscopic (observable) quantities like forming force and final sheet thickness distribution.


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