Dependence of fatigue limit on step height for stepped 0.45% carbon steel with singular stress field

Shigeru Hamada; Tsuyoshi Moriyama; Hiroshi Noguchi

doi:10.1016/j.engfracmech.2017.07.010

Dependence of fatigue limit on step height for stepped 0.45% carbon steel with singular stress field

Shigeru Hamada, Tsuyoshi Moriyama, Hiroshi Noguchi

Strength of materials

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

2 Citations (Scopus)

Abstract

A method was proposed for evaluating the relationship between the fatigue limit and the step height for a stepped plate with a sharp corner. With reference to a small crack size dependence of fatigue limit, step heights were divided into three levels, and a new evaluation method was proposed for representing the singular stress field intensity around the corner tip. An intensity factor of the singular stress field of the corner was introduced and correlated with the step height. The fatigue limit for stepped plates was represented by the threshold value of the range of the intensity factor. Moreover, the fatigue limits for extra-low stepped plates and high stepped plates, which could not be directly measured, were estimated based on the fatigue phenomena at these conditions.

Original language	English
Pages (from-to)	20-35
Number of pages	16
Journal	Engineering Fracture Mechanics
Volume	188
DOIs	https://doi.org/10.1016/j.engfracmech.2017.07.010
Publication status	Published - Feb 1 2018

All Science Journal Classification (ASJC) codes

Materials Science(all)
Mechanics of Materials
Mechanical Engineering

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10.1016/j.engfracmech.2017.07.010

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abstract = "A method was proposed for evaluating the relationship between the fatigue limit and the step height for a stepped plate with a sharp corner. With reference to a small crack size dependence of fatigue limit, step heights were divided into three levels, and a new evaluation method was proposed for representing the singular stress field intensity around the corner tip. An intensity factor of the singular stress field of the corner was introduced and correlated with the step height. The fatigue limit for stepped plates was represented by the threshold value of the range of the intensity factor. Moreover, the fatigue limits for extra-low stepped plates and high stepped plates, which could not be directly measured, were estimated based on the fatigue phenomena at these conditions.",

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AU - Hamada, Shigeru

AU - Moriyama, Tsuyoshi

AU - Noguchi, Hiroshi

PY - 2018/2/1

Y1 - 2018/2/1

N2 - A method was proposed for evaluating the relationship between the fatigue limit and the step height for a stepped plate with a sharp corner. With reference to a small crack size dependence of fatigue limit, step heights were divided into three levels, and a new evaluation method was proposed for representing the singular stress field intensity around the corner tip. An intensity factor of the singular stress field of the corner was introduced and correlated with the step height. The fatigue limit for stepped plates was represented by the threshold value of the range of the intensity factor. Moreover, the fatigue limits for extra-low stepped plates and high stepped plates, which could not be directly measured, were estimated based on the fatigue phenomena at these conditions.

AB - A method was proposed for evaluating the relationship between the fatigue limit and the step height for a stepped plate with a sharp corner. With reference to a small crack size dependence of fatigue limit, step heights were divided into three levels, and a new evaluation method was proposed for representing the singular stress field intensity around the corner tip. An intensity factor of the singular stress field of the corner was introduced and correlated with the step height. The fatigue limit for stepped plates was represented by the threshold value of the range of the intensity factor. Moreover, the fatigue limits for extra-low stepped plates and high stepped plates, which could not be directly measured, were estimated based on the fatigue phenomena at these conditions.

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Dependence of fatigue limit on step height for stepped 0.45% carbon steel with singular stress field

Abstract

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