Verification of a cohesive model-based extended finite element method for ductile crack propagation

Huan Li; Lei Li; Jiangkun Fan; Zhufeng Yue

doi:10.1111/ffe.13392

Verification of a cohesive model-based extended finite element method for ductile crack propagation

Huan Li, Lei Li, Jiangkun Fan, Zhufeng Yue

Research output: Contribution to journal › Article › peer-review

13 Scopus citations

Abstract

In this study, an approach utilizing a conjunction of the extended finite element method (XFEM) and the Gurson-Tvergaard-Needleman (GTN) micromechanical damage model is proposed for predicting the ductile crack propagation of a mill-annealed Ti-6Al-4V alloy. The cohesive model-based XFEM approach is used to capture the continuous crack propagation process, and the GTN model is applied to describe the constitutive behaviour of the material. Simulations are conducted by using the standard finite element code ABAQUS following a Newton–Raphson algorithm solution with employing the user material subroutine of the GTN model. In comparison with the experimentalresults of the smooth, notched and cracked titanium specimens, this approach is shown to be an efficient method for simulating the ductile crack propagation process under different stress triaxialities.

Original language	English
Pages (from-to)	762-775
Number of pages	14
Journal	Fatigue and Fracture of Engineering Materials and Structures
Volume	44
Issue number	3
DOIs	https://doi.org/10.1111/ffe.13392
State	Published - Mar 2021

Keywords

cohesive model
crack propagation
ductile fracture
extended finite element method
GTN model

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10.1111/ffe.13392

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title = "Verification of a cohesive model-based extended finite element method for ductile crack propagation",

abstract = "In this study, an approach utilizing a conjunction of the extended finite element method (XFEM) and the Gurson-Tvergaard-Needleman (GTN) micromechanical damage model is proposed for predicting the ductile crack propagation of a mill-annealed Ti-6Al-4V alloy. The cohesive model-based XFEM approach is used to capture the continuous crack propagation process, and the GTN model is applied to describe the constitutive behaviour of the material. Simulations are conducted by using the standard finite element code ABAQUS following a Newton–Raphson algorithm solution with employing the user material subroutine of the GTN model. In comparison with the experimentalresults of the smooth, notched and cracked titanium specimens, this approach is shown to be an efficient method for simulating the ductile crack propagation process under different stress triaxialities.",

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AU - Li, Huan

AU - Li, Lei

AU - Fan, Jiangkun

AU - Yue, Zhufeng

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Y1 - 2021/3

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AB - In this study, an approach utilizing a conjunction of the extended finite element method (XFEM) and the Gurson-Tvergaard-Needleman (GTN) micromechanical damage model is proposed for predicting the ductile crack propagation of a mill-annealed Ti-6Al-4V alloy. The cohesive model-based XFEM approach is used to capture the continuous crack propagation process, and the GTN model is applied to describe the constitutive behaviour of the material. Simulations are conducted by using the standard finite element code ABAQUS following a Newton–Raphson algorithm solution with employing the user material subroutine of the GTN model. In comparison with the experimentalresults of the smooth, notched and cracked titanium specimens, this approach is shown to be an efficient method for simulating the ductile crack propagation process under different stress triaxialities.

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Verification of a cohesive model-based extended finite element method for ductile crack propagation

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Keywords

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