Experiment and Meso-Damage Finite Element Analysis of Uniaxial Tension of Galvanized Steel Sheets

Abstract:

Uniaxial tension tests for galvanized steel sheets are performed. Fractured surfaces of the specimens are observed by means of the scanning electron microscope (SEM). It is confirmed that the specimens experience ductile fracture. Based on the Gurson meso-damage theory, Hill’48-GTN anisotropic damage model is presented, and used to analyze the uniaxial tension test. The true stress-strain curves are fitted by three kinds of main flow stress models. After comparing the fitting precisions, the Voce model is selected as the flow stress model for the simulation analysis. The simulation results show that the Hill’48-GTN model can be used to accurately predict the whole process of damage occurrence, evolution and fracture in tension, and void volume fraction can be taken as a forming limit parameter of sheet metal forming.

• Periodical: Advanced Materials Research (Volumes 472-475)
• Pages: 547-555
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.472-475.547
• Online since: February 2012
• Authors: Zhi Ying Chen, Xiang Huai Dong
• Keywords: Anisotropy, Damage Model, Finite Element Method (FEM), Flow Stress, Galvanized Steel Sheet, Uniaxial Tension

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