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Investigation on Simulation of Buckling of Aluminium Sheet Alloys

The lack of accuracy of buckling prediction in forming simulation is widely known. This is mainly caused by insufficient element stiffness as well as a very simplified strain path but not sheet thickness dependent buckling criterion. Within this contribution a methodology for investigating such issue is developed. This paper also reveals possibilities concerning an experimental analysis of buckling sensitivity of AA6016 aluminium sheet metal alloys. For this purpose, specimen shape referring to Yoshida which cannot be used for aluminium alloys have been enhanced simulatively. Thus, nine geometries ensuring different strain paths have been developed and validated experimentally. Based on this simulative and experimental test set up a buckling criterion for plane aluminium sheets under uniaxial tension is given here.

application/pdf C-I-02.pdf — 3.0 MB