TY - JOUR

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

AU - Ju, S. H.

AU - Cha, K. C.

N1 - Funding Information:
The work has been carried out as part of the project ‘Property investigation and dynamic analysis of joints in machine tools’, financed by the Chung–Shan Institute of Science and Technology, Republic of China.

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.

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U2 - 10.1023/A:1018645707462

DO - 10.1023/A:1018645707462

M3 - Article

AN - SCOPUS:0033323489

VL - 96

SP - 1

EP - 15

JO - International Journal of Fracture

JF - International Journal of Fracture

SN - 0376-9429

IS - 1

ER -