Simulation of Fatigue Crack Growth in Friction Stir-Welded Joints of 2024-T351 Aluminum Alloy

The present work simulates and predicts the fatigue crack growth in the friction stir welded (FSW) joint of the 2024-T351 Al alloy. The simulation is used to estimate the fatigue life of this welded joint. The study is based on finite element method (FEM) and in the framework of Fracture Analysis Co...

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Main Author:	Golestaneh, Amirreza Fahim
Format:	Thesis
Language:	English English
Published:	2008
Subjects:	Fatigue testing machines Aluminium alloys
Online Access:	http://psasir.upm.edu.my/id/eprint/5453/1/FK_2008_70A.pdf
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id	my-upm-ir.5453
record_format	uketd_dc
spelling	my-upm-ir.54532013-05-27T07:22:56Z Simulation of Fatigue Crack Growth in Friction Stir-Welded Joints of 2024-T351 Aluminum Alloy 2008 Golestaneh, Amirreza Fahim The present work simulates and predicts the fatigue crack growth in the friction stir welded (FSW) joint of the 2024-T351 Al alloy. The simulation is used to estimate the fatigue life of this welded joint. The study is based on finite element method (FEM) and in the framework of Fracture Analysis Code for two-dimensional (FRANC2D/L), developed by Fracture Group of Cornell University. Fatigue crack behavior through the FSW joint is investigated under Linear Elastic Fracture Mechanics (LEFM) using the Paris’ model. The work concentrated on a stable crack propagation regime, the obtained fatigue life shows good agreement with experimental and analytical results. The present work incorporates a few different types of loading which are 1) the cyclic fatigue loading for the case of R= 0.1, 2) the longitudinal tensile residual stress, 3) the crack closure concept and 4) the residual stress relaxation phenomenon. In the current work the stress intensity factor is calculated by applying displacement correlation technique, which is based on calculating the displacement field around the crack tip. The maximum circumferential tensile stress method was used to predict the fatigue crack direction. In fact FRANC2D/L does not have the capacity to consider different Paris’ constants for FSW zones and it predicts the crack propagation through the welded zones by considering the same values of Paris’ constants. This work presents a strategy to investigate the crack growth based on the corresponding Paris’ constants for each FSW zone. The numerical results are validated with the previous experimental and analytical work, which show a good agreement of 88% and 97%. Fatigue testing machines Aluminium alloys 2008 Thesis http://psasir.upm.edu.my/id/eprint/5453/ http://psasir.upm.edu.my/id/eprint/5453/1/FK_2008_70A.pdf application/pdf en public masters Universiti Putra Malaysia Fatigue testing machines Aluminium alloys Faculty of Engineering English
institution	Universiti Putra Malaysia
collection	PSAS Institutional Repository
language	English English
topic	Fatigue testing machines Aluminium alloys
spellingShingle	Fatigue testing machines Aluminium alloys Golestaneh, Amirreza Fahim Simulation of Fatigue Crack Growth in Friction Stir-Welded Joints of 2024-T351 Aluminum Alloy
description	The present work simulates and predicts the fatigue crack growth in the friction stir welded (FSW) joint of the 2024-T351 Al alloy. The simulation is used to estimate the fatigue life of this welded joint. The study is based on finite element method (FEM) and in the framework of Fracture Analysis Code for two-dimensional (FRANC2D/L), developed by Fracture Group of Cornell University. Fatigue crack behavior through the FSW joint is investigated under Linear Elastic Fracture Mechanics (LEFM) using the Paris’ model. The work concentrated on a stable crack propagation regime, the obtained fatigue life shows good agreement with experimental and analytical results. The present work incorporates a few different types of loading which are 1) the cyclic fatigue loading for the case of R= 0.1, 2) the longitudinal tensile residual stress, 3) the crack closure concept and 4) the residual stress relaxation phenomenon. In the current work the stress intensity factor is calculated by applying displacement correlation technique, which is based on calculating the displacement field around the crack tip. The maximum circumferential tensile stress method was used to predict the fatigue crack direction. In fact FRANC2D/L does not have the capacity to consider different Paris’ constants for FSW zones and it predicts the crack propagation through the welded zones by considering the same values of Paris’ constants. This work presents a strategy to investigate the crack growth based on the corresponding Paris’ constants for each FSW zone. The numerical results are validated with the previous experimental and analytical work, which show a good agreement of 88% and 97%.
format	Thesis
qualification_level	Master's degree
author	Golestaneh, Amirreza Fahim
author_facet	Golestaneh, Amirreza Fahim
author_sort	Golestaneh, Amirreza Fahim
title	Simulation of Fatigue Crack Growth in Friction Stir-Welded Joints of 2024-T351 Aluminum Alloy
title_short	Simulation of Fatigue Crack Growth in Friction Stir-Welded Joints of 2024-T351 Aluminum Alloy
title_full	Simulation of Fatigue Crack Growth in Friction Stir-Welded Joints of 2024-T351 Aluminum Alloy
title_fullStr	Simulation of Fatigue Crack Growth in Friction Stir-Welded Joints of 2024-T351 Aluminum Alloy
title_full_unstemmed	Simulation of Fatigue Crack Growth in Friction Stir-Welded Joints of 2024-T351 Aluminum Alloy
title_sort	simulation of fatigue crack growth in friction stir-welded joints of 2024-t351 aluminum alloy
granting_institution	Universiti Putra Malaysia
granting_department	Faculty of Engineering
publishDate	2008
url	http://psasir.upm.edu.my/id/eprint/5453/1/FK_2008_70A.pdf
_version_	1747810428800466944

Simulation of Fatigue Crack Growth in Friction Stir-Welded Joints of 2024-T351 Aluminum Alloy

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