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

被引：60

作者：

Abbassi, Fethi ^{[1
]}

Mistou, Sebastien ^{[2
]}

Zghal, Ali ^{[1
]}

机构：

[1] Univ Tunis, URMSSDT, ESSTT, Bab Manara 1008, Tunisia

[2] Univ Toulouse, INP ENIT, LGP M2SP, F-65016 Tarbes, France

来源：

MATERIALS & DESIGN | 2013年 / 49卷

关键词：

Tensile test; Fractography; Numerical modeling; Damage model; Necking; Microvoid growth; FINITE-ELEMENT-ANALYSIS; STRAIN-LOCALIZATION; DUCTILE; FRACTURE; NECKING; STEEL; IDENTIFICATION; PARAMETERS; STRESS;

D O I：

10.1016/j.matdes.2013.02.020

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

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 damage 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. (C) 2013 Elsevier Ltd. All rights reserved.

引用

页码：638 / 646

页数：9

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