The influence of rounded edges on indentation by a flat punch
The influence of rounded edges on indentation by a flat punch
The contact problem and stress state for indentation by a flat punch with rounded edges is studied. For the contact problem itself analytical solutions are obtained for both surface pressure and interior stress fields. Cases of normal indentation and frictional contact, the latter in both sliding or partial slip conditions, are all treated.
The transition from the Hertzian configuration to the contact between a nominally flat pad and contacting flat surface is discussed, and it is found that the strength of the contact decays surprisingly slowly. Regarding the von Mises yield parameter, there is a range of configurations for which the strength is actually higher than the Hertzian one, and the strength decays only when the corner radii are very small. The present solution is therefore a realistic alternative to the classical rigid-flat punch idealization, and has particular application to fretting fatigue tests.
contact stresses, flat punch, fretting fatigue pads
319-327
Ciavarella, M.
d5aa6350-b3d4-4a78-a670-9d78242f58c5
Hills, D.A.
d7ac6eb1-a16e-4a2c-b3ff-86e82cfbf3d6
Monno, G.
2ed35922-2947-46b7-9633-9cfd1c9fbe07
1998
Ciavarella, M.
d5aa6350-b3d4-4a78-a670-9d78242f58c5
Hills, D.A.
d7ac6eb1-a16e-4a2c-b3ff-86e82cfbf3d6
Monno, G.
2ed35922-2947-46b7-9633-9cfd1c9fbe07
Ciavarella, M., Hills, D.A. and Monno, G.
(1998)
The influence of rounded edges on indentation by a flat punch.
Proceedings of the Institution of Mechanical Engineers, Part C: Journal of Mechanical Engineering Science, 212 (4), .
(doi:10.1243/0954406981521259).
Abstract
The contact problem and stress state for indentation by a flat punch with rounded edges is studied. For the contact problem itself analytical solutions are obtained for both surface pressure and interior stress fields. Cases of normal indentation and frictional contact, the latter in both sliding or partial slip conditions, are all treated.
The transition from the Hertzian configuration to the contact between a nominally flat pad and contacting flat surface is discussed, and it is found that the strength of the contact decays surprisingly slowly. Regarding the von Mises yield parameter, there is a range of configurations for which the strength is actually higher than the Hertzian one, and the strength decays only when the corner radii are very small. The present solution is therefore a realistic alternative to the classical rigid-flat punch idealization, and has particular application to fretting fatigue tests.
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Ciav_98c.pdf
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More information
Published date: 1998
Keywords:
contact stresses, flat punch, fretting fatigue pads
Identifiers
Local EPrints ID: 23245
URI: http://eprints.soton.ac.uk/id/eprint/23245
ISSN: 0954-4062
PURE UUID: 69510363-9b04-49dc-8acb-9ad8ff094c30
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Date deposited: 15 Feb 2007
Last modified: 15 Mar 2024 06:45
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Contributors
Author:
M. Ciavarella
Author:
D.A. Hills
Author:
G. Monno
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