Fatigue analysis of non-load-carrying fillet welded cruciform joints

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Fatigue analysis of non-load-carrying fillet welded cruciform joints. / Nykanen, T.; Marquis, G.; Bjork, T.

In: Engineering Fracture Mechanics, Vol. 74, No. 3, 02.2007, p. 399-415.

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@article{000bddce9cf845deab88f8c72d8fb4ab,
title = "Fatigue analysis of non-load-carrying fillet welded cruciform joints",
abstract = "The goal of this investigation was to study the effect of local geometrical variations of the weld on the fatigue strength. Therefore the fatigue behaviour of non-load-carrying cruciform fillet welded joint under tensile loading has been studied parametrically. Several two-dimensional (2D) finite element models of the joint were analysed using plane strain linear elastic fracture mechanics (LEFM) calculations in order to get the magnification function M-k. A maximum tangential stress criterion was used to predict the crack growth direction under mixed mode K-I-K-II conditions. The derived M-k solution was then applied both for continuous weld toe cracks and also for semi-elliptical toe cracks at the deepest point of the crack front. An experimental crack aspect ratio development curve was used for propagating semi-elliptical cracks. The as-welded condition was assumed with the result that no crack initiation period was considered and stress ranges were fully effective. The Paris crack growth law was used to predict the growth rate. The effects of weld toe radius, flank angle and weld size on the fatigue strength were systematically studied. Finally, predicted fatigue strength values corresponding to different assumed crack sizes were compared with the available test results. (c) 2006 Elsevier Ltd. All rights reserved.",
keywords = "fracture mechanics, fatigue, welded joints, magnification factor, fatigue strength, initial crack size",
author = "T. Nykanen and G. Marquis and T. Bjork",
year = "2007",
month = "2",
doi = "10.1016/j.engfracmech.2006.05.017",
language = "English",
volume = "74",
pages = "399--415",
journal = "Engineering Fracture Mechanics",
issn = "0013-7944",
number = "3",

}

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TY - JOUR

T1 - Fatigue analysis of non-load-carrying fillet welded cruciform joints

AU - Nykanen, T.

AU - Marquis, G.

AU - Bjork, T.

PY - 2007/2

Y1 - 2007/2

N2 - The goal of this investigation was to study the effect of local geometrical variations of the weld on the fatigue strength. Therefore the fatigue behaviour of non-load-carrying cruciform fillet welded joint under tensile loading has been studied parametrically. Several two-dimensional (2D) finite element models of the joint were analysed using plane strain linear elastic fracture mechanics (LEFM) calculations in order to get the magnification function M-k. A maximum tangential stress criterion was used to predict the crack growth direction under mixed mode K-I-K-II conditions. The derived M-k solution was then applied both for continuous weld toe cracks and also for semi-elliptical toe cracks at the deepest point of the crack front. An experimental crack aspect ratio development curve was used for propagating semi-elliptical cracks. The as-welded condition was assumed with the result that no crack initiation period was considered and stress ranges were fully effective. The Paris crack growth law was used to predict the growth rate. The effects of weld toe radius, flank angle and weld size on the fatigue strength were systematically studied. Finally, predicted fatigue strength values corresponding to different assumed crack sizes were compared with the available test results. (c) 2006 Elsevier Ltd. All rights reserved.

AB - The goal of this investigation was to study the effect of local geometrical variations of the weld on the fatigue strength. Therefore the fatigue behaviour of non-load-carrying cruciform fillet welded joint under tensile loading has been studied parametrically. Several two-dimensional (2D) finite element models of the joint were analysed using plane strain linear elastic fracture mechanics (LEFM) calculations in order to get the magnification function M-k. A maximum tangential stress criterion was used to predict the crack growth direction under mixed mode K-I-K-II conditions. The derived M-k solution was then applied both for continuous weld toe cracks and also for semi-elliptical toe cracks at the deepest point of the crack front. An experimental crack aspect ratio development curve was used for propagating semi-elliptical cracks. The as-welded condition was assumed with the result that no crack initiation period was considered and stress ranges were fully effective. The Paris crack growth law was used to predict the growth rate. The effects of weld toe radius, flank angle and weld size on the fatigue strength were systematically studied. Finally, predicted fatigue strength values corresponding to different assumed crack sizes were compared with the available test results. (c) 2006 Elsevier Ltd. All rights reserved.

KW - fracture mechanics

KW - fatigue

KW - welded joints

KW - magnification factor

KW - fatigue strength

KW - initial crack size

U2 - 10.1016/j.engfracmech.2006.05.017

DO - 10.1016/j.engfracmech.2006.05.017

M3 - Article

VL - 74

SP - 399

EP - 415

JO - Engineering Fracture Mechanics

JF - Engineering Fracture Mechanics

SN - 0013-7944

IS - 3

ER -

ID: 3205733