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Numerical Investigation of the Plastic Contact Deformation between Hemispheres: Variation of Radii Ratio and Normal Loads

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Abstract:

Investigation of local plastic deformation between rough surfaces in mechanical components such as gears, camshaft and bearings is very important. Contact between real surfaces occurs at the summits of the highest asperities which vary in height and radius. The plastic deformation of the contact between two asperities was studied in this paper. Asperity contact was modelled as a contact between hemispheres. The commercial finite element software, ABAQUS, was employed to perform the numerical contact analysis of the elastic perfectly-plastic deforming hemispheres with the ratios of radii (R2/R1) from 1 to 7. Normal loads of 5000 N, 8000 N and 11000 N were applied to the frictionless contact of the hemispheres. It was shown that the plastic deformation ratio (ωp1/ωp2) decreases as the radii ratio increases. The higher normal load showed a lower plastic deformation ratio for high radii ratio. The results indicate that the radii ratio contributes to the severity of the plastic deformation and the total displacement of the contacting asperities.

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Periodical:

Advanced Materials Research (Volume 1123)

Pages:

16-19

DOI:

https://doi.org/10.4028/www.scientific.net/AMR.1123.16

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Online since:

August 2015

Authors:

Rifky Ismail*, T. Prasojo, Mohammad Tauviqirrahman, J. Jamari, Dirk Jan Schipper

Keywords:

Contact Mechanics, Finite Element Analysis, Hemisphere, Plastic Deformation

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© 2015 Trans Tech Publications Ltd. All Rights Reserved

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