Determination of Flow Curve Using Bulge Test and Calibration of Damage for Ito-Goya Models

Abstract:

The standard uniaxial tensile test is the widely accepted method to obtain relevant properties of mechanical characterization of sheet metal materials. However the range of strain obtained from tensile test is limited. The bulge test is an alternative to obtain ranges of deformation, higher than tensile test, thus permitting a better characterization for material behaviour. This paper presents a sensitivity analysis for some influencing variables used in bulge measurements, thus giving some guidelines for the evaluation of the stress-strain curve from experimental results using a developed experimental mechanical system. Additionally, using bulge test up to fracture shall give material information regarding damage, which in turn may be used to evaluate and calibrate damage models. A methodology is presented to be used for evaluation and calibration of Ito-Goya damage model of damage prediction.

• Periodical: Key Engineering Materials (Volumes 554-557)
• Pages: 182-189
• DOI: https://doi.org/10.4028/www.scientific.net/KEM.554-557.182
• Online since: June 2013
• Authors: Bruno Martins, Abel D. Santos, Pedro Teixeira, K. Ito, N. Mori
• Keywords: Finite Element Method (FEM), Flow Curve, Hydraulic Bulge Test, Material Characterisation, Sheet Metal Forming

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