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

Pathapalli Venkateshwar Reddy, B. Veerabhadra Reddy, Perumalla Janaki Ramulu and U. Pranavi
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Pathapalli Venkateshwar Reddy: Vardhaman College of Engineering, India
B. Veerabhadra Reddy: G. Pulla Reddy Engineering College, India
Perumalla Janaki Ramulu: Adama Science and Technology University, Ethiopia
U. Pranavi: Vardhaman College of Engineering, India

International Journal of Manufacturing, Materials, and Mechanical Engineering (IJMMME), 2022, vol. 12, issue 1, 1-11

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

Date: 2022
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