Evaluating stress intensity factors of a surface crack in lubricated rolling contacts

S. H. Ju; K. C. Cha

doi:10.1023/A:1018645707462

Evaluating stress intensity factors of a surface crack in lubricated rolling contacts

S. H. Ju^*, K. C. Cha

^*Corresponding author for this work

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

8 Scopus citations

Abstract

The three-dimensional finite element method and the least-squares method were used to find the stress intensity factors (SIFs) of a surface crack in a lubricated roller. A steel roller on a rigid plane was modeled, in which a semi-elliptical surface crack is inclined at an angle ψ to the vertical axis. A distance c is set between the crack base and the roller edge. The results indicate that the mode-I SIF reaches the maximum value when the angle θ is equal to 0° (on the roller surface), and the mode-II SIF reaches the absolute maximum value when the angle θ is near or equal to 90° (inside the roller), where θ is the angle of the semi-ellipse from 0° to 180°. The influence of mode-III SIFs in this model is minor since they are much smaller than the mode-I and mode-II SIFs. The SIFs increase greatly when the crack location approaches the uncrowned edge. At this time, a crowned profile can be used to significantly reduce the SIFs near the roller edge.

Original language	English
Pages (from-to)	1-15
Number of pages	15
Journal	International Journal of Fracture
Volume	96
Issue number	1
DOIs	https://doi.org/10.1023/A:1018645707462
State	Published - 1999
Externally published	Yes

Keywords

Crack
Finite element method
Least-squares
Roller bearing
Stress intensity factors

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10.1023/A:1018645707462

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title = "Evaluating stress intensity factors of a surface crack in lubricated rolling contacts",

abstract = "The three-dimensional finite element method and the least-squares method were used to find the stress intensity factors (SIFs) of a surface crack in a lubricated roller. A steel roller on a rigid plane was modeled, in which a semi-elliptical surface crack is inclined at an angle ψ to the vertical axis. A distance c is set between the crack base and the roller edge. The results indicate that the mode-I SIF reaches the maximum value when the angle θ is equal to 0° (on the roller surface), and the mode-II SIF reaches the absolute maximum value when the angle θ is near or equal to 90° (inside the roller), where θ is the angle of the semi-ellipse from 0° to 180°. The influence of mode-III SIFs in this model is minor since they are much smaller than the mode-I and mode-II SIFs. The SIFs increase greatly when the crack location approaches the uncrowned edge. At this time, a crowned profile can be used to significantly reduce the SIFs near the roller edge.",

keywords = "Crack, Finite element method, Least-squares, Roller bearing, Stress intensity factors",

author = "Ju, {S. H.} and Cha, {K. C.}",

year = "1999",

doi = "10.1023/A:1018645707462",

language = "英语",

volume = "96",

pages = "1--15",

journal = "International Journal of Fracture",

issn = "0376-9429",

publisher = "Springer Netherlands",

number = "1",

}

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T1 - Evaluating stress intensity factors of a surface crack in lubricated rolling contacts

AU - Ju, S. H.

AU - Cha, K. C.

PY - 1999

Y1 - 1999

N2 - The three-dimensional finite element method and the least-squares method were used to find the stress intensity factors (SIFs) of a surface crack in a lubricated roller. A steel roller on a rigid plane was modeled, in which a semi-elliptical surface crack is inclined at an angle ψ to the vertical axis. A distance c is set between the crack base and the roller edge. The results indicate that the mode-I SIF reaches the maximum value when the angle θ is equal to 0° (on the roller surface), and the mode-II SIF reaches the absolute maximum value when the angle θ is near or equal to 90° (inside the roller), where θ is the angle of the semi-ellipse from 0° to 180°. The influence of mode-III SIFs in this model is minor since they are much smaller than the mode-I and mode-II SIFs. The SIFs increase greatly when the crack location approaches the uncrowned edge. At this time, a crowned profile can be used to significantly reduce the SIFs near the roller edge.

AB - The three-dimensional finite element method and the least-squares method were used to find the stress intensity factors (SIFs) of a surface crack in a lubricated roller. A steel roller on a rigid plane was modeled, in which a semi-elliptical surface crack is inclined at an angle ψ to the vertical axis. A distance c is set between the crack base and the roller edge. The results indicate that the mode-I SIF reaches the maximum value when the angle θ is equal to 0° (on the roller surface), and the mode-II SIF reaches the absolute maximum value when the angle θ is near or equal to 90° (inside the roller), where θ is the angle of the semi-ellipse from 0° to 180°. The influence of mode-III SIFs in this model is minor since they are much smaller than the mode-I and mode-II SIFs. The SIFs increase greatly when the crack location approaches the uncrowned edge. At this time, a crowned profile can be used to significantly reduce the SIFs near the roller edge.

KW - Crack

KW - Finite element method

KW - Least-squares

KW - Roller bearing

KW - Stress intensity factors

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DO - 10.1023/A:1018645707462

M3 - 文章

AN - SCOPUS:0033323489

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SP - 1

EP - 15

JO - International Journal of Fracture

JF - International Journal of Fracture

IS - 1

ER -

Evaluating stress intensity factors of a surface crack in lubricated rolling contacts

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Keywords

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