Factors affecting the fatigue strength of thin-plates in large structures

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Factors affecting the fatigue strength of thin-plates in large structures. / Remes, Heikki; Romanoff, Jani; Lillemäe, Ingrit; Frank, Darko; Liinalampi, Sami; Lehto, Pauli; Varsta, Petri.

In: INTERNATIONAL JOURNAL OF FATIGUE, Vol. 101, 08.2017, p. 397-407.

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@article{a695e8ae93314caf96873de20976e739,
title = "Factors affecting the fatigue strength of thin-plates in large structures",
abstract = "This paper studies the main factors affecting the fatigue strength assessment of thin plates in large structures. The first part of study includes the influence of initial distortions, joints' flexibility and surrounding structure on structural stress analysis of welded joint. The second part covers the influence of joint and its geometrical properties on fatigue strength modelling. The third part includes also the material elastic-plastic behaviour and the influence of crack propagation. The results show that if the structural analysis considers secondary bending properly, the local elastic fatigue damage parameters such as J-integral range can be used to model fatigue strength at 2-5. million load cycles. However, to explain the slope variation of the fatigue resistance curve, the consideration of material elastic-plastic behaviour and short crack growth is needed. The strain-based crack growth simulations indicate that longer short crack growth period is the reason for the higher slope value. The importance of short crack growth is dependent on the weld notch geometry and plate thickness.",
keywords = "Fatigue crack initiation, Fatigue strength, Local approaches, Thin plate, Weld",
author = "Heikki Remes and Jani Romanoff and Ingrit Lillem{\"a}e and Darko Frank and Sami Liinalampi and Pauli Lehto and Petri Varsta",
year = "2017",
month = "8",
doi = "10.1016/j.ijfatigue.2016.11.019",
language = "English",
volume = "101",
pages = "397--407",
journal = "INTERNATIONAL JOURNAL OF FATIGUE",
issn = "0142-1123",

}

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TY - JOUR

T1 - Factors affecting the fatigue strength of thin-plates in large structures

AU - Remes, Heikki

AU - Romanoff, Jani

AU - Lillemäe, Ingrit

AU - Frank, Darko

AU - Liinalampi, Sami

AU - Lehto, Pauli

AU - Varsta, Petri

PY - 2017/8

Y1 - 2017/8

N2 - This paper studies the main factors affecting the fatigue strength assessment of thin plates in large structures. The first part of study includes the influence of initial distortions, joints' flexibility and surrounding structure on structural stress analysis of welded joint. The second part covers the influence of joint and its geometrical properties on fatigue strength modelling. The third part includes also the material elastic-plastic behaviour and the influence of crack propagation. The results show that if the structural analysis considers secondary bending properly, the local elastic fatigue damage parameters such as J-integral range can be used to model fatigue strength at 2-5. million load cycles. However, to explain the slope variation of the fatigue resistance curve, the consideration of material elastic-plastic behaviour and short crack growth is needed. The strain-based crack growth simulations indicate that longer short crack growth period is the reason for the higher slope value. The importance of short crack growth is dependent on the weld notch geometry and plate thickness.

AB - This paper studies the main factors affecting the fatigue strength assessment of thin plates in large structures. The first part of study includes the influence of initial distortions, joints' flexibility and surrounding structure on structural stress analysis of welded joint. The second part covers the influence of joint and its geometrical properties on fatigue strength modelling. The third part includes also the material elastic-plastic behaviour and the influence of crack propagation. The results show that if the structural analysis considers secondary bending properly, the local elastic fatigue damage parameters such as J-integral range can be used to model fatigue strength at 2-5. million load cycles. However, to explain the slope variation of the fatigue resistance curve, the consideration of material elastic-plastic behaviour and short crack growth is needed. The strain-based crack growth simulations indicate that longer short crack growth period is the reason for the higher slope value. The importance of short crack growth is dependent on the weld notch geometry and plate thickness.

KW - Fatigue crack initiation

KW - Fatigue strength

KW - Local approaches

KW - Thin plate

KW - Weld

UR - http://www.scopus.com/inward/record.url?scp=85006880741&partnerID=8YFLogxK

U2 - 10.1016/j.ijfatigue.2016.11.019

DO - 10.1016/j.ijfatigue.2016.11.019

M3 - Article

VL - 101

SP - 397

EP - 407

JO - INTERNATIONAL JOURNAL OF FATIGUE

JF - INTERNATIONAL JOURNAL OF FATIGUE

SN - 0142-1123

ER -

ID: 10322819