Analytical Treatment of Distortion Effects on Fatigue Behaviors of Lightweight Shipboard Structures

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Analytical Treatment of Distortion Effects on Fatigue Behaviors of Lightweight Shipboard Structures. / Zhou, Wenqing; Dong, Pingsha; Lillemäe, Ingrit; Remes, Heikki.

julkaisussa: INTERNATIONAL JOURNAL OF FATIGUE, Vuosikerta 130, 105286, 01.01.2020.

Tutkimustuotos: Lehtiartikkeli

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Bibtex - Lataa

@article{6db20b81f6dc471eb31bd2aa066d4baa,
title = "Analytical Treatment of Distortion Effects on Fatigue Behaviors of Lightweight Shipboard Structures",
abstract = "In this paper, a notional load method is presented for providing analytical treatment of complex distortion effects on fatigue behaviors of lightweight shipboard structures through a distortion decomposition technique. Its applications for analyzing secondary bending stresses caused by nonlinear interactions between four common distortion types induced by welding and remotely applied load are discussed in detail. In addition, two sets of lab-scale specimens and nine full-scale stiffened panel fatigue tests involving complex distortion shapes are also analyzed using the closed form analytical solutions developed. The analytically calculated stress concentration factor results are validated by direct finite element computations in all cases. Furthermore, fatigue test data obtained from both butt-welded thin plate lab specimens and full-scale stiffened panels are shown not only in a good agreement with one another, but also fully contained by the master S-N curve scatter band adopted by ASME Div. 2 since 2007.",
keywords = "Secondary bending, Lightweight structures, Welding distortions, Stress concentration factors, Master S-N curve",
author = "Wenqing Zhou and Pingsha Dong and Ingrit Lillem{\"a}e and Heikki Remes",
year = "2020",
month = "1",
day = "1",
doi = "10.1016/j.ijfatigue.2019.105286",
language = "English",
volume = "130",
journal = "INTERNATIONAL JOURNAL OF FATIGUE",
issn = "0142-1123",

}

RIS - Lataa

TY - JOUR

T1 - Analytical Treatment of Distortion Effects on Fatigue Behaviors of Lightweight Shipboard Structures

AU - Zhou, Wenqing

AU - Dong, Pingsha

AU - Lillemäe, Ingrit

AU - Remes, Heikki

PY - 2020/1/1

Y1 - 2020/1/1

N2 - In this paper, a notional load method is presented for providing analytical treatment of complex distortion effects on fatigue behaviors of lightweight shipboard structures through a distortion decomposition technique. Its applications for analyzing secondary bending stresses caused by nonlinear interactions between four common distortion types induced by welding and remotely applied load are discussed in detail. In addition, two sets of lab-scale specimens and nine full-scale stiffened panel fatigue tests involving complex distortion shapes are also analyzed using the closed form analytical solutions developed. The analytically calculated stress concentration factor results are validated by direct finite element computations in all cases. Furthermore, fatigue test data obtained from both butt-welded thin plate lab specimens and full-scale stiffened panels are shown not only in a good agreement with one another, but also fully contained by the master S-N curve scatter band adopted by ASME Div. 2 since 2007.

AB - In this paper, a notional load method is presented for providing analytical treatment of complex distortion effects on fatigue behaviors of lightweight shipboard structures through a distortion decomposition technique. Its applications for analyzing secondary bending stresses caused by nonlinear interactions between four common distortion types induced by welding and remotely applied load are discussed in detail. In addition, two sets of lab-scale specimens and nine full-scale stiffened panel fatigue tests involving complex distortion shapes are also analyzed using the closed form analytical solutions developed. The analytically calculated stress concentration factor results are validated by direct finite element computations in all cases. Furthermore, fatigue test data obtained from both butt-welded thin plate lab specimens and full-scale stiffened panels are shown not only in a good agreement with one another, but also fully contained by the master S-N curve scatter band adopted by ASME Div. 2 since 2007.

KW - Secondary bending

KW - Lightweight structures

KW - Welding distortions

KW - Stress concentration factors

KW - Master S-N curve

U2 - 10.1016/j.ijfatigue.2019.105286

DO - 10.1016/j.ijfatigue.2019.105286

M3 - Article

VL - 130

JO - INTERNATIONAL JOURNAL OF FATIGUE

JF - INTERNATIONAL JOURNAL OF FATIGUE

SN - 0142-1123

M1 - 105286

ER -

ID: 37043159