A numerical solution is presented for a single load-unload cycle of an adhesive contact between an elastic-plastic sphere and a rigid flat. The interacting forces between the sphere and the flat are obtained through connecting non-linear spring elements having force-displacement behavior that obeys the Lennard-Jones potential. Linear kinematic hardening (with tangent modulus of 2% and 5% of the Young’s modulus) rather than isotropic hardening is assumed for the sphere material to account for possible secondary plastification during the unloading. The well known Tabor parameter and a plasticity parameter are shown to be the two main dimensionless parameters governing the problem. The effects of these two parameters on the load-approach curves, on the plastically deformed sphere profiles and on the plastic strain fields inside the sphere are presented, showing different modes of separation during the unloading.
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ASME 2008 9th Biennial Conference on Engineering Systems Design and Analysis
July 7–9, 2008
Haifa, Israel
Conference Sponsors:
- International
ISBN:
978-0-7918-4837-1
PROCEEDINGS PAPER
Loading-Unloading of an Elastic-Plastic Adhesive Spherical Contact
Yuri Kadin,
Yuri Kadin
Technion-Israel Institute of Technology, Haifa, Israel
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Yuri Kligerman,
Yuri Kligerman
Technion-Israel Institute of Technology, Haifa, Israel
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Izhak Etsion
Izhak Etsion
Technion-Israel Institute of Technology, Haifa, Israel
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Yuri Kadin
Technion-Israel Institute of Technology, Haifa, Israel
Yuri Kligerman
Technion-Israel Institute of Technology, Haifa, Israel
Izhak Etsion
Technion-Israel Institute of Technology, Haifa, Israel
Paper No:
ESDA2008-59089, pp. 377-383; 7 pages
Published Online:
July 6, 2009
Citation
Kadin, Y, Kligerman, Y, & Etsion, I. "Loading-Unloading of an Elastic-Plastic Adhesive Spherical Contact." Proceedings of the ASME 2008 9th Biennial Conference on Engineering Systems Design and Analysis. Volume 3: Design; Tribology; Education. Haifa, Israel. July 7–9, 2008. pp. 377-383. ASME. https://doi.org/10.1115/ESDA2008-59089
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