Behavior of small cracks under negative stress ratio fatigue loading

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Behavior of small cracks under negative stress ratio fatigue loading. / Roiko, A.; Solin, Jussi; Hänninen, H.

In: INTERNATIONAL JOURNAL OF FATIGUE, Vol. 104, 01.11.2017, p. 379-388.

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@article{853443ec9e2c48859184991a289d1fe9,
title = "Behavior of small cracks under negative stress ratio fatigue loading",
abstract = "In this paper we analyze growth of small cracks initiated from microscopic notches and loaded near the growth threshold under different stress ratios. The results of in-situ optical measurements during high cycle fatigue testing show that small cracks initiate and grow quickly after which there is a long period of slow growth until the large crack growth threshold is reached. The crack growth rate data from different loading ratios indicates that the positive portion of the stress amplitude or the maximum stress intensity factor can be used to compare crack growth rates. The test data also shows that increasing only the compressive stress portion of the loading will cause an arrested small crack to grow again.",
author = "A. Roiko and Jussi Solin and H. H{\"a}nninen",
year = "2017",
month = "11",
day = "1",
doi = "10.1016/j.ijfatigue.2017.07.006",
language = "English",
volume = "104",
pages = "379--388",
journal = "INTERNATIONAL JOURNAL OF FATIGUE",
issn = "0142-1123",

}

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TY - JOUR

T1 - Behavior of small cracks under negative stress ratio fatigue loading

AU - Roiko, A.

AU - Solin, Jussi

AU - Hänninen, H.

PY - 2017/11/1

Y1 - 2017/11/1

N2 - In this paper we analyze growth of small cracks initiated from microscopic notches and loaded near the growth threshold under different stress ratios. The results of in-situ optical measurements during high cycle fatigue testing show that small cracks initiate and grow quickly after which there is a long period of slow growth until the large crack growth threshold is reached. The crack growth rate data from different loading ratios indicates that the positive portion of the stress amplitude or the maximum stress intensity factor can be used to compare crack growth rates. The test data also shows that increasing only the compressive stress portion of the loading will cause an arrested small crack to grow again.

AB - In this paper we analyze growth of small cracks initiated from microscopic notches and loaded near the growth threshold under different stress ratios. The results of in-situ optical measurements during high cycle fatigue testing show that small cracks initiate and grow quickly after which there is a long period of slow growth until the large crack growth threshold is reached. The crack growth rate data from different loading ratios indicates that the positive portion of the stress amplitude or the maximum stress intensity factor can be used to compare crack growth rates. The test data also shows that increasing only the compressive stress portion of the loading will cause an arrested small crack to grow again.

UR - http://www.scopus.com/inward/record.url?scp=85028373308&partnerID=8YFLogxK

U2 - 10.1016/j.ijfatigue.2017.07.006

DO - 10.1016/j.ijfatigue.2017.07.006

M3 - Article

VL - 104

SP - 379

EP - 388

JO - INTERNATIONAL JOURNAL OF FATIGUE

JF - INTERNATIONAL JOURNAL OF FATIGUE

SN - 0142-1123

ER -

ID: 14994504