Fatigue strength modelling of high-performing welded joints

Heikki Remes; Pasquale Gallo; Jasmin Jelovica; Jani Romanoff; Pauli Lehto

doi:10.1016/j.ijfatigue.2020.105555

Fatigue strength modelling of high-performing welded joints

Heikki Remes, Pasquale Gallo, Jasmin Jelovica, Jani Romanoff, Pauli Lehto

Department of Mechanical Engineering

University of British Columbia

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

38 Citations (Scopus)

513 Downloads (Pure)

Abstract

This paper investigates the fatigue strength modelling of high-performing welded steel joints. The work considers the strain-based, notch stress, averaged strain energy density approaches, and linear elastic fracture mechanics. A comparison of the methods with experimental data shows that the predictions vary significantly for different modelling assumptions. Only the microstructure-sensitive strain-based approach can predict the fatigue life of various weld geometries and plate thicknesses. The explicit modelling of the localised plasticity using the microstructure-dependent representative volume element is required for accurate prediction of the short crack initiation and growth periods, which dominate the fatigue life modelling of high-performing welds.

Original language	English
Article number	105555
Number of pages	15
Journal	International Journal of Fatigue
Volume	135
DOIs	https://doi.org/10.1016/j.ijfatigue.2020.105555
Publication status	Published - Jun 2020
MoE publication type	A1 Journal article-refereed

Keywords

Fatigue strength
Welded joint
Strain-based approach
Notch stress approach
Strain energy density

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10.1016/j.ijfatigue.2020.105555Licence: CC BY

1-s2.0-S0142112320300864-mainFinal published version, 5.68 MBLicence: CC BY

Cite this

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title = "Fatigue strength modelling of high-performing welded joints",

abstract = "This paper investigates the fatigue strength modelling of high-performing welded steel joints. The work considers the strain-based, notch stress, averaged strain energy density approaches, and linear elastic fracture mechanics. A comparison of the methods with experimental data shows that the predictions vary significantly for different modelling assumptions. Only the microstructure-sensitive strain-based approach can predict the fatigue life of various weld geometries and plate thicknesses. The explicit modelling of the localised plasticity using the microstructure-dependent representative volume element is required for accurate prediction of the short crack initiation and growth periods, which dominate the fatigue life modelling of high-performing welds.",

keywords = "Fatigue strength, Welded joint, Strain-based approach, Notch stress approach, Strain energy density",

author = "Heikki Remes and Pasquale Gallo and Jasmin Jelovica and Jani Romanoff and Pauli Lehto",

year = "2020",

month = jun,

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language = "English",

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journal = "International Journal of Fatigue",

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publisher = "Elsevier Science Ltd.",

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AU - Remes, Heikki

AU - Gallo, Pasquale

AU - Jelovica, Jasmin

AU - Romanoff, Jani

AU - Lehto, Pauli

PY - 2020/6

Y1 - 2020/6

N2 - This paper investigates the fatigue strength modelling of high-performing welded steel joints. The work considers the strain-based, notch stress, averaged strain energy density approaches, and linear elastic fracture mechanics. A comparison of the methods with experimental data shows that the predictions vary significantly for different modelling assumptions. Only the microstructure-sensitive strain-based approach can predict the fatigue life of various weld geometries and plate thicknesses. The explicit modelling of the localised plasticity using the microstructure-dependent representative volume element is required for accurate prediction of the short crack initiation and growth periods, which dominate the fatigue life modelling of high-performing welds.

AB - This paper investigates the fatigue strength modelling of high-performing welded steel joints. The work considers the strain-based, notch stress, averaged strain energy density approaches, and linear elastic fracture mechanics. A comparison of the methods with experimental data shows that the predictions vary significantly for different modelling assumptions. Only the microstructure-sensitive strain-based approach can predict the fatigue life of various weld geometries and plate thicknesses. The explicit modelling of the localised plasticity using the microstructure-dependent representative volume element is required for accurate prediction of the short crack initiation and growth periods, which dominate the fatigue life modelling of high-performing welds.

KW - Fatigue strength

KW - Welded joint

KW - Strain-based approach

KW - Notch stress approach

KW - Strain energy density

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DO - 10.1016/j.ijfatigue.2020.105555

M3 - Article

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VL - 135

JO - International Journal of Fatigue

JF - International Journal of Fatigue

M1 - 105555

ER -

Fatigue strength modelling of high-performing welded joints

Abstract

Keywords

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-: Multiscale models for the fatigue assessment of engineering applications: experimental investigation of fatigue mechanisms at micro and nanoscale.

Microstructure-based Continuum Damage Modelling of Fatigue in High-performance Welds

i3 – Industry Innovation Infrastructure

Solid Mechanics Laboratory (i3)

Cite this

Fatigue strength modelling of high-performing welded joints

Abstract

Keywords

Access to Document

Other files and links

Fingerprint

Projects

-: Multiscale models for the fatigue assessment of engineering applications: experimental investigation of fatigue mechanisms at micro and nanoscale.

Microstructure-based Continuum Damage Modelling of Fatigue in High-performance Welds

Equipment

i3 – Industry Innovation Infrastructure

Solid Mechanics Laboratory (i3)

Cite this