Fatigue strength of thin laser-hybrid welded full-scale deck structure

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Fatigue strength of thin laser-hybrid welded full-scale deck structure. / Lillemäe, Ingrit; Liinalampi, Sami; Remes, Heikki; Itävuo, Antti; Niemelä, Ari.

julkaisussa: INTERNATIONAL JOURNAL OF FATIGUE, Vuosikerta 95, 2017, s. 282-292.

Tutkimustuotos: Lehtiartikkelivertaisarvioitu

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Lillemäe, Ingrit ; Liinalampi, Sami ; Remes, Heikki ; Itävuo, Antti ; Niemelä, Ari. / Fatigue strength of thin laser-hybrid welded full-scale deck structure. Julkaisussa: INTERNATIONAL JOURNAL OF FATIGUE. 2017 ; Vuosikerta 95. Sivut 282-292.

Bibtex - Lataa

@article{721dcfd9ab48439590a546a94b220f13,
title = "Fatigue strength of thin laser-hybrid welded full-scale deck structure",
abstract = "The fatigue behavior of a 4-mm thick laser-hybrid welded structure was studied using small- and full-scale specimens. The aim of the work was to understand the response and fatigue strength of large thin welded structures. The difference and similarity between small- and full-scale specimens, which is crucial in order to transfer fatigue test results into fatigue design, was carefully studied. The experiments included accurate optical geometry measurements and constant amplitude fatigue testing under axial loading. The fatigue test results were analyzed in terms of structural hot spot stress. The results showed that when initial distortion shape and geometrical nonlinearity are properly considered, the small- and full-scale specimens have equal fatigue strength with small scatter and the same S-N curve slope close to m = 5. In addition, the measured fatigue strength is considerably higher in comparison to IIW structural stress design curve FAT100. This indicates that high fatigue strength can be achieved in thin laser-hybrid welded structures, given that the shape and the magnitude of initial distortion as well as the weld quality are controlled.",
keywords = "Fatigue strength, Thin plate, Butt joint, Full-scale fatigue test, Structural hot spot stress",
author = "Ingrit Lillem{\"a}e and Sami Liinalampi and Heikki Remes and Antti It{\"a}vuo and Ari Niemel{\"a}",
year = "2017",
doi = "10.1016/j.ijfatigue.2016.11.012",
language = "English",
volume = "95",
pages = "282--292",
journal = "INTERNATIONAL JOURNAL OF FATIGUE",
issn = "0142-1123",

}

RIS - Lataa

TY - JOUR

T1 - Fatigue strength of thin laser-hybrid welded full-scale deck structure

AU - Lillemäe, Ingrit

AU - Liinalampi, Sami

AU - Remes, Heikki

AU - Itävuo, Antti

AU - Niemelä, Ari

PY - 2017

Y1 - 2017

N2 - The fatigue behavior of a 4-mm thick laser-hybrid welded structure was studied using small- and full-scale specimens. The aim of the work was to understand the response and fatigue strength of large thin welded structures. The difference and similarity between small- and full-scale specimens, which is crucial in order to transfer fatigue test results into fatigue design, was carefully studied. The experiments included accurate optical geometry measurements and constant amplitude fatigue testing under axial loading. The fatigue test results were analyzed in terms of structural hot spot stress. The results showed that when initial distortion shape and geometrical nonlinearity are properly considered, the small- and full-scale specimens have equal fatigue strength with small scatter and the same S-N curve slope close to m = 5. In addition, the measured fatigue strength is considerably higher in comparison to IIW structural stress design curve FAT100. This indicates that high fatigue strength can be achieved in thin laser-hybrid welded structures, given that the shape and the magnitude of initial distortion as well as the weld quality are controlled.

AB - The fatigue behavior of a 4-mm thick laser-hybrid welded structure was studied using small- and full-scale specimens. The aim of the work was to understand the response and fatigue strength of large thin welded structures. The difference and similarity between small- and full-scale specimens, which is crucial in order to transfer fatigue test results into fatigue design, was carefully studied. The experiments included accurate optical geometry measurements and constant amplitude fatigue testing under axial loading. The fatigue test results were analyzed in terms of structural hot spot stress. The results showed that when initial distortion shape and geometrical nonlinearity are properly considered, the small- and full-scale specimens have equal fatigue strength with small scatter and the same S-N curve slope close to m = 5. In addition, the measured fatigue strength is considerably higher in comparison to IIW structural stress design curve FAT100. This indicates that high fatigue strength can be achieved in thin laser-hybrid welded structures, given that the shape and the magnitude of initial distortion as well as the weld quality are controlled.

KW - Fatigue strength

KW - Thin plate

KW - Butt joint

KW - Full-scale fatigue test

KW - Structural hot spot stress

U2 - 10.1016/j.ijfatigue.2016.11.012

DO - 10.1016/j.ijfatigue.2016.11.012

M3 - Article

VL - 95

SP - 282

EP - 292

JO - INTERNATIONAL JOURNAL OF FATIGUE

JF - INTERNATIONAL JOURNAL OF FATIGUE

SN - 0142-1123

ER -

ID: 9410819