Zusammenfassung: | |
A finite-element deterministic two-dimensional thermal elasto-plastic contact model is presented in this article, which facilitates the investigation of the influence of steady-state frictional heating on contacting asperities and subsurface stress fields. This model takes into account the asperity distortion caused by the temperature variation in a tribological process, microplastic flow of surface asperities, and coupled thermo-elasto-plastic behaviour of the material, with and without considering the strain-hardening property of the material. The model is verified through the contact analysis of a rigid, isothermal cylinder with a thermally conductive, elasto-plastic plane. The maximum contact pressures increase with frictional heating. Furthermore, thermal effects on the contact pressure, real area of the contact, and average gap of a real rough surface with different frictional heat inputs under thermal elasto-plastic contact conditions are numerically investigated. It indicates that neglecting thermal effect overestimates the real area of the contact and underestimates the average gap between the contacting surfaces. © IMechE 2008.
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Lizenzbestimmungen: | Es gilt deutsches Urheberrecht. Das Dokument darf zum eigenen Gebrauch kostenfrei genutzt, aber nicht im Internet bereitgestellt oder an Außenstehende weitergegeben werden. Dieser Beitrag ist aufgrund einer (DFG-geförderten) Allianz- bzw. Nationallizenz frei zugänglich. |
Publikationstyp: | Article |
Publikationsstatus: | publishedVersion |
Erstveröffentlichung: | 2008 |
Schlagwörter (englisch): | Contact, Rough surfaces, Steady state, Thermal elasto-plastic, Conducting polymers, Elastoplasticity, Finite element method, Friction, Gallium alloys, Heating, Surface measurement, Surfaces, Thermal effects, Thermography (temperature measurement), Two dimensional, Contact, Contact analysis, Contact pressures, Contacting surfaces, Frictional heating, Frictional heats, Hardening properties, Isothermal cylinders, Plastic contacts, Rough surfaces, Steady state, Sub-surface stress fields, Surface asperities, Temperature variations, Thermal elasto-plastic, Surface properties |
Fachliche Zuordnung (DDC): | 620 | Ingenieurwissenschaften und Maschinenbau |
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