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.

Fatigue strength modelling of high-performing welded joints / Remes, Heikki; Gallo, Pasquale; Jelovica, Jasmin; Romanoff, Jani; Lehto, Pauli. - In: INTERNATIONAL JOURNAL OF FATIGUE. - ISSN 0142-1123. - 135:(2020), p. 105555. [10.1016/j.ijfatigue.2020.105555]

Fatigue strength modelling of high-performing welded joints

Gallo, Pasquale
Secondo
;
2020-01-01

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.
2020
Remes, Heikki; Gallo, Pasquale; Jelovica, Jasmin; Romanoff, Jani; Lehto, Pauli
Fatigue strength modelling of high-performing welded joints / Remes, Heikki; Gallo, Pasquale; Jelovica, Jasmin; Romanoff, Jani; Lehto, Pauli. - In: INTERNATIONAL JOURNAL OF FATIGUE. - ISSN 0142-1123. - 135:(2020), p. 105555. [10.1016/j.ijfatigue.2020.105555]
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11572/403656
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