A micromechanical model for ductile fracture of API X65

Chang Kyun Oh; Yun Jae Kim; Jong Hyun Baek; Young Pyo Kim; Woo Sik Kim

doi:10.4028/0-87849-412-x.43

A micromechanical model for ductile fracture of API X65

Chang Kyun Oh, Yun Jae Kim, Jong Hyun Baek, Young Pyo Kim, Woo Sik Kim

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

Abstract

This paper presents a micro-mechanical model of ductile fracture for the API X65 steel, using the Gurson-Tvergaard-Needleman (GTN) model. Experimental tests and FE damage simulations using the GTN model are performed for smooth and notched tensile bars with three different notch radii, from which micromechanical parameters in the GTN model are calibrated. The calibrated micro-mechanical model is applied to quantify pre-strain effects on plastic deformation and fracture of the API X65 steel. Good agreements of the FE damage results with experimental data suggest confidence in the use of the proposed micro-mechanical model to simulate ductile failure of pipelines made of API X65 steels.

Original language	English
Pages (from-to)	43-47
Number of pages	5
Journal	Key Engineering Materials
Volume	321-323 I
DOIs	https://doi.org/10.4028/0-87849-412-x.43
Publication status	Published - 2006

Keywords

API X65
Ductile fracture
GTN model
Micromechanical model
Pre-strain effect

ASJC Scopus subject areas

General Materials Science
Mechanics of Materials
Mechanical Engineering

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10.4028/0-87849-412-x.43

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title = "A micromechanical model for ductile fracture of API X65",

abstract = "This paper presents a micro-mechanical model of ductile fracture for the API X65 steel, using the Gurson-Tvergaard-Needleman (GTN) model. Experimental tests and FE damage simulations using the GTN model are performed for smooth and notched tensile bars with three different notch radii, from which micromechanical parameters in the GTN model are calibrated. The calibrated micro-mechanical model is applied to quantify pre-strain effects on plastic deformation and fracture of the API X65 steel. Good agreements of the FE damage results with experimental data suggest confidence in the use of the proposed micro-mechanical model to simulate ductile failure of pipelines made of API X65 steels.",

keywords = "API X65, Ductile fracture, GTN model, Micromechanical model, Pre-strain effect",

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AU - Oh, Chang Kyun

AU - Kim, Yun Jae

AU - Baek, Jong Hyun

AU - Kim, Young Pyo

AU - Kim, Woo Sik

PY - 2006

Y1 - 2006

N2 - This paper presents a micro-mechanical model of ductile fracture for the API X65 steel, using the Gurson-Tvergaard-Needleman (GTN) model. Experimental tests and FE damage simulations using the GTN model are performed for smooth and notched tensile bars with three different notch radii, from which micromechanical parameters in the GTN model are calibrated. The calibrated micro-mechanical model is applied to quantify pre-strain effects on plastic deformation and fracture of the API X65 steel. Good agreements of the FE damage results with experimental data suggest confidence in the use of the proposed micro-mechanical model to simulate ductile failure of pipelines made of API X65 steels.

AB - This paper presents a micro-mechanical model of ductile fracture for the API X65 steel, using the Gurson-Tvergaard-Needleman (GTN) model. Experimental tests and FE damage simulations using the GTN model are performed for smooth and notched tensile bars with three different notch radii, from which micromechanical parameters in the GTN model are calibrated. The calibrated micro-mechanical model is applied to quantify pre-strain effects on plastic deformation and fracture of the API X65 steel. Good agreements of the FE damage results with experimental data suggest confidence in the use of the proposed micro-mechanical model to simulate ductile failure of pipelines made of API X65 steels.

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KW - Ductile fracture

KW - GTN model

KW - Micromechanical model

KW - Pre-strain effect

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A micromechanical model for ductile fracture of API X65

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Keywords

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