Conference Publication Details
Mandatory Fields
Otegi, N,Galdos, L,Hurtado, I,Leen, SB,Bernhart, G
New Strategy for the prediction of the Gas Pressure Profile of Superplastic Forming of Al-5083 Aluminium Alloy
SUPERPLASTICITY IN ADVANCED MATERIALS
2013
April
Published
1
WOS: 1 ()
Optional Fields
Superplastic forming cavitation Al5083 mechanisms-based constitutive equations HYDROSTATIC-PRESSURE OPTIMIZATION CAVITATION GROWTH
204
This paper describes a new approach for identification of the optimum pressure history for SPF processes, based on mechanisms-based hyperbolic constitutive equations. This equation set has been modified to incorporate the effect of the damage behaviour the material suffers due to the cavitational evolution of Al-5083 superplastic alloy. A large deformation, multiaxial formulation of the constitutive equation set is implemented and applied to finite element modelling of a bulge test forming process to characterise the cavitation evolution behaviour in the bulge test, using conventional (constant strain rate) and the newly proposed (variable strain rate) strategy.
10.4028/www.scientific.net/MSF.735.204
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