Micro mechanics theory of fatigue threshold stress intensity factor and dislocation free zone

Toshimitsu Yokobori; Takeshi Isogai; Takeo Yokobori

Micro mechanics theory of fatigue threshold stress intensity factor and dislocation free zone

Toshimitsu Yokobori, Takeshi Isogai, Takeo Yokobori

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

Abstract

The fatigue threshold stress intensity for factor ΔK_th, based on dislocation dynamics was formulated as a simple function of temperature and grain size. This theory shows ΔK_th decreases as temperature increases, and corresponds well with the experimental data for steel under not so high temperature. This theory also corresponds well with the surface roughness effect on ΔK_th. Furthermore, the mechanical characteristics of the dislocation free zone were analyzed for various materials, and ΔK_th was estimated by the dislocation free zone. The dislocation free zone corresponds well with the mechanical characteristics of ΔK_th.

Original language	English
Pages (from-to)	1298-1303
Number of pages	6
Journal	Nippon Kikai Gakkai Ronbunshu, A Hen/Transactions of the Japan Society of Mechanical Engineers, Part A
Volume	54
Issue number	503
Publication status	Published - 1988 Jul
Externally published	Yes

ASJC Scopus subject areas

Mechanical Engineering

Cite this

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title = "Micro mechanics theory of fatigue threshold stress intensity factor and dislocation free zone",

abstract = "The fatigue threshold stress intensity for factor ΔKth, based on dislocation dynamics was formulated as a simple function of temperature and grain size. This theory shows ΔKth decreases as temperature increases, and corresponds well with the experimental data for steel under not so high temperature. This theory also corresponds well with the surface roughness effect on ΔKth. Furthermore, the mechanical characteristics of the dislocation free zone were analyzed for various materials, and ΔKth was estimated by the dislocation free zone. The dislocation free zone corresponds well with the mechanical characteristics of ΔKth.",

author = "Toshimitsu Yokobori and Takeshi Isogai and Takeo Yokobori",

year = "1988",

month = jul,

language = "English",

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T1 - Micro mechanics theory of fatigue threshold stress intensity factor and dislocation free zone

AU - Yokobori, Toshimitsu

AU - Isogai, Takeshi

AU - Yokobori, Takeo

PY - 1988/7

Y1 - 1988/7

N2 - The fatigue threshold stress intensity for factor ΔKth, based on dislocation dynamics was formulated as a simple function of temperature and grain size. This theory shows ΔKth decreases as temperature increases, and corresponds well with the experimental data for steel under not so high temperature. This theory also corresponds well with the surface roughness effect on ΔKth. Furthermore, the mechanical characteristics of the dislocation free zone were analyzed for various materials, and ΔKth was estimated by the dislocation free zone. The dislocation free zone corresponds well with the mechanical characteristics of ΔKth.

AB - The fatigue threshold stress intensity for factor ΔKth, based on dislocation dynamics was formulated as a simple function of temperature and grain size. This theory shows ΔKth decreases as temperature increases, and corresponds well with the experimental data for steel under not so high temperature. This theory also corresponds well with the surface roughness effect on ΔKth. Furthermore, the mechanical characteristics of the dislocation free zone were analyzed for various materials, and ΔKth was estimated by the dislocation free zone. The dislocation free zone corresponds well with the mechanical characteristics of ΔKth.

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VL - 54

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JO - Nihon Kikai Gakkai Ronbunshu, A Hen/Transactions of the Japan Society of Mechanical Engineers, Part A

JF - Nihon Kikai Gakkai Ronbunshu, A Hen/Transactions of the Japan Society of Mechanical Engineers, Part A

SN - 0387-5008

IS - 503

ER -

Micro mechanics theory of fatigue threshold stress intensity factor and dislocation free zone

Abstract

ASJC Scopus subject areas

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