Comparison of Constitutive Models for Predicting the Formability of SS 304 by Tubular Hydroforming Process

Finite Element (FE) simulation of sheet/tube forming precision depends mainly on the accuracy constitutive modeling. The present paper aim is to compare models fit stress-strain curves. accurate deformation behavior SS 304 tubes modeling hardening behavior. Deformation data tensile specimens cut from tubular sample were collected by conducting Uniaxial tests (UTT) at three different rolling directions. Five relationships then recognized fitting true stress and strain with Hollomon, Power, Krupowsky, Voce Ghosh, analyzed compared. Effects Forming Limit Curves (FLC), pressure loading bulge height hydroformed tube studied. obtained FLC simulations compared experimental predict models.