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Modelling and simulation of colliding asperities
Luleå University of Technology, Department of Engineering Sciences and Mathematics, Machine Elements.
Luleå University of Technology, Department of Engineering Sciences and Mathematics, Machine Elements.ORCID iD: 0000-0001-7029-1112
Luleå University of Technology, Department of Engineering Sciences and Mathematics, Mechanics of Solid Materials.ORCID iD: 0000-0003-0910-7990
Luleå University of Technology, Department of Engineering Sciences and Mathematics, Machine Elements.ORCID iD: 0000-0001-9110-2819
2016 (English)In: International Journal of Solids and Structures, ISSN 0020-7683, E-ISSN 1879-2146Article in journal (Refereed) Submitted
Abstract [en]

Flash temperature is an important factor in tribological contacts; it will affect the material properties, the lubricants, formation and removal of oxide layers and tribofilms etc. Since flash temperature is dependent on contact pressure, friction and velocity, a thermomechanical analysis of elasto-plastic asperity collisions was carried out and is presented in this paper. Case studies based on different combinations of interferences, friction coefficients and velocities are conducted in order to assess the influence of interference, friction coefficient and material properties on contact pressure and plastic deformation. The study of deformation and stress distribution of colliding asperities will therefore be greatly helpful in order to predict the risk of wear. Both temperature variation during the asperity collision, and residual temperature after the collision have been investigated. In this paper, results from the time-dependent numerical simulation show that temperature will quickly rise to its maximum value, and then drop to the residual value in a very short time during and after the collision; the trends of temperature rise in different conditions are depicted and discussed in the end.

Place, publisher, year, edition, pages
2016.
National Category
Tribology (Interacting Surfaces including Friction, Lubrication and Wear) Applied Mechanics
Research subject
Machine Elements; Solid Mechanics
Identifiers
URN: urn:nbn:se:ltu:diva-4498Local ID: 26fc489e-25f6-46a1-a0b1-2339dbb55998OAI: oai:DiVA.org:ltu-4498DiVA: diva2:977372
Note
Upprättat; 2016; 20130815 (kang)Available from: 2016-09-29 Created: 2016-09-29 Last updated: 2018-01-10

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Kang, ShaojieAlmqvist, AndreasJonsén, PärLarsson, Roland
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Tribology (Interacting Surfaces including Friction, Lubrication and Wear)Applied Mechanics

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