Quantitative evaluation of the displacement distribution and stress intensity factor of fatigue cracks healed by a controlled high-density electric current field

A. Hosoi; T. Yano; Y. Morita; Y. Ju

doi:10.1111/ffe.12175

Quantitative evaluation of the displacement distribution and stress intensity factor of fatigue cracks healed by a controlled high-density electric current field

A. Hosoi, T. Yano, Y. Morita, Y. Ju^*

^*Corresponding author for this work

Research output: Contribution to journal › Article › peer-review

14 Citations (Scopus)

Abstract

Fatigue cracks were healed by controlling a high-density electric current. The changes in the displacement distribution around the crack tip and the stress intensity factor before and after crack healing were evaluated quantitatively with a digital image collation method. According to the results, it was determined that the cracks were closed by approximately 2 to 7-μm in this study. On the other hand, the stress intensity factor decreased or increased depending on the conditions of the crack and the current applied. The physical restriction between the crack surfaces, such as bridging, is important with respect to lowering the stress intensity factor after healing.

Original language	English
Pages (from-to)	1025-1033
Number of pages	9
Journal	Fatigue and Fracture of Engineering Materials and Structures
Volume	37
Issue number	9
DOIs	https://doi.org/10.1111/ffe.12175
Publication status	Published - 2014 Sept
Externally published	Yes

Keywords

crack healing
digital image correlation
electric current
fatigue
stress intensity factor

ASJC Scopus subject areas

Materials Science(all)
Mechanics of Materials
Mechanical Engineering

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10.1111/ffe.12175

Cite this

Quantitative evaluation of the displacement distribution and stress intensity factor of fatigue cracks healed by a controlled high-density electric current field. / Hosoi, A.; Yano, T.; Morita, Y. et al.
In: Fatigue and Fracture of Engineering Materials and Structures, Vol. 37, No. 9, 09.2014, p. 1025-1033.

Research output: Contribution to journal › Article › peer-review

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N2 - Fatigue cracks were healed by controlling a high-density electric current. The changes in the displacement distribution around the crack tip and the stress intensity factor before and after crack healing were evaluated quantitatively with a digital image collation method. According to the results, it was determined that the cracks were closed by approximately 2 to 7-μm in this study. On the other hand, the stress intensity factor decreased or increased depending on the conditions of the crack and the current applied. The physical restriction between the crack surfaces, such as bridging, is important with respect to lowering the stress intensity factor after healing.

AB - Fatigue cracks were healed by controlling a high-density electric current. The changes in the displacement distribution around the crack tip and the stress intensity factor before and after crack healing were evaluated quantitatively with a digital image collation method. According to the results, it was determined that the cracks were closed by approximately 2 to 7-μm in this study. On the other hand, the stress intensity factor decreased or increased depending on the conditions of the crack and the current applied. The physical restriction between the crack surfaces, such as bridging, is important with respect to lowering the stress intensity factor after healing.

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KW - stress intensity factor

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Quantitative evaluation of the displacement distribution and stress intensity factor of fatigue cracks healed by a controlled high-density electric current field

Abstract

Keywords

ASJC Scopus subject areas

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