EWI has recently developed a new technique to obtain improved accuracy in material flow stress for modeling metal forming processes.
The method uses the hydraulic bulge test (HBT) and digital image correlation (DIC) analysis and applies the plastic work equivalency principle to determine an optimal arc length for the for calculation of a biaxial flow curve. It yields a maximum uniform equivalent strain that is twice the maximum uniform strain that could be obtained in the past, thus offering improved accuracy.
EWI associates Amir Asgharzadeh and Laura Zoller have written Advanced DIC Post-processing Technique to Analyze Biaxial Bulge Test to describe this work. You are invited to download this paper FOR FREE by completing the form on this page.
To discuss this technique or other forming tests offered by EWI, contact Laura Zoller at [email protected].