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Failure analysis based on microvoid growth for sheet metal during uniaxial and biaxial tensile tests

Abbassi, Fethi and Mistou, Sébastien and Zghal, Ali Failure analysis based on microvoid growth for sheet metal during uniaxial and biaxial tensile tests. (2013) Materials & Design, 49. 638-646. ISSN 0261-3069

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Official URL: http://dx.doi.org/10.1016/j.matdes.2013.02.020

Abstract

The aim of the presented investigations is to perform an analysis of fracture and instability during simple and complex load testing by addressing the influence of ductile damage evolution in necking processes. In this context, an improved experimental methodology was developed and successfully used to evaluate localization of deformation during uniaxial and biaxial tensile tests. The biaxial tensile tests are carried out using cruciform specimen loaded using a biaxial testing machine. In this experimental investigation, Stereo-Image Correlation technique has is used to produce the heterogeneous deformations map within the specimen surface. Scanning electron microscope is used to evaluate the fracture mechanism and the micro-voids growth. A finite element model of uniaxial and biaxial tensile tests are developed, where a ductile damage model Gurson-Tvergaard-Needleman (GTN) is used to describe material deformation involving d`amage evolution. Comparison between the experimental and the simulation results show the accuracy of the finite element model to predict the instability phenomenon. The advanced measurement techniques contribute to understand better the ductile fracture mechanism.

Item Type:Article
Additional Information:Thanks to Elsevier editor. The definitive version is available at http://dx.doi.org/10.1016/j.matdes.2013.02.020
HAL Id:hal-00816002
Audience (journal):International peer-reviewed journal
Uncontrolled Keywords:
Institution:Université de Toulouse > Institut National Polytechnique de Toulouse - Toulouse INP (FRANCE)
Other partners > Université de Tunis (TUNISIA)
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Deposited On:19 Apr 2013 14:01

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