Influence of crack tip plasticity on the slope of fatigue curves for laser stake-welded T-joints loaded under tension and bending

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@article{0e0b2cd87b254cb08b0b30d7b49632ff,
title = "Influence of crack tip plasticity on the slope of fatigue curves for laser stake-welded T-joints loaded under tension and bending",
abstract = "The paper investigates the crack tip plasticity of laser stake-welded T-joints when loaded in tension and bending. Irwin's first-order plastic zone size is kept equal for the selected load levels, and finite element (FE) analyses are carried out to investigate the stress redistribution in the plastic zone varying the applied loads. The results allow us to explain why the fatigue slope m is different for bending and tension. Moreover, a new method is proposed that permits the number of cycles to failure under bending to be derived directly from the tension fatigue curve, employing an effective J-integral. The results prove that the method is able to give an estimation of the number of cycles to failure under bending with a very good approximation and acceptable errors.",
keywords = "Crack tip plasticity, Fatigue assessment, Fatigue strength, Laser stake-welds, Slope of fatigue curve",
author = "Pasquale Gallo and Heikki Remes and Jani Romanoff",
year = "2017",
month = "6",
day = "1",
doi = "10.1016/j.ijfatigue.2017.02.025",
language = "English",
volume = "99",
pages = "125--136",
journal = "INTERNATIONAL JOURNAL OF FATIGUE",
issn = "0142-1123",

}

RIS - Lataa

TY - JOUR

T1 - Influence of crack tip plasticity on the slope of fatigue curves for laser stake-welded T-joints loaded under tension and bending

AU - Gallo, Pasquale

AU - Remes, Heikki

AU - Romanoff, Jani

PY - 2017/6/1

Y1 - 2017/6/1

N2 - The paper investigates the crack tip plasticity of laser stake-welded T-joints when loaded in tension and bending. Irwin's first-order plastic zone size is kept equal for the selected load levels, and finite element (FE) analyses are carried out to investigate the stress redistribution in the plastic zone varying the applied loads. The results allow us to explain why the fatigue slope m is different for bending and tension. Moreover, a new method is proposed that permits the number of cycles to failure under bending to be derived directly from the tension fatigue curve, employing an effective J-integral. The results prove that the method is able to give an estimation of the number of cycles to failure under bending with a very good approximation and acceptable errors.

AB - The paper investigates the crack tip plasticity of laser stake-welded T-joints when loaded in tension and bending. Irwin's first-order plastic zone size is kept equal for the selected load levels, and finite element (FE) analyses are carried out to investigate the stress redistribution in the plastic zone varying the applied loads. The results allow us to explain why the fatigue slope m is different for bending and tension. Moreover, a new method is proposed that permits the number of cycles to failure under bending to be derived directly from the tension fatigue curve, employing an effective J-integral. The results prove that the method is able to give an estimation of the number of cycles to failure under bending with a very good approximation and acceptable errors.

KW - Crack tip plasticity

KW - Fatigue assessment

KW - Fatigue strength

KW - Laser stake-welds

KW - Slope of fatigue curve

UR - http://www.scopus.com/inward/record.url?scp=85014164897&partnerID=8YFLogxK

U2 - 10.1016/j.ijfatigue.2017.02.025

DO - 10.1016/j.ijfatigue.2017.02.025

M3 - Article

VL - 99

SP - 125

EP - 136

JO - INTERNATIONAL JOURNAL OF FATIGUE

JF - INTERNATIONAL JOURNAL OF FATIGUE

SN - 0142-1123

ER -

ID: 11247527