Load-separation curves for the contact of self-affine rough surfaces

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Veröffentlicht in:	Scientific reports Bd. 7.2017, Art.-Nr. 6900, insges. 7 Seiten
Personen und Körperschaften:	Papangelo, Antonio (VerfasserIn), Hoffmann, Norbert (VerfasserIn), Ciavarella, Michele (VerfasserIn), Technische Universität Hamburg (Sonstige, Sonstige Körperschaft), Technische Universität Hamburg-Harburg Dynamics Group (Sonstige, Sonstige Körperschaft)
Titel:	Load-separation curves for the contact of self-affine rough surfaces/ Antonio Papangelo, Norbert Hoffmann & Michele Ciavarella
Format:	E-Book-Kapitel
Sprache:	Englisch
veröffentlicht:	2017
Gesamtaufnahme:	: Scientific reports, Bd. 7.2017, Art.-Nr. 6900, insges. 7 Seiten , volume:7
Schlagwörter:	wavevector valves thermal conductance lubrication
Quelle:	Verbunddaten SWB Lizenzfreie Online-Ressourcen

Details
Zusammenfassung:	There are two main approximate theories in the contact of rough solids: Greenwood-Williamson asperity theories (GW) and Persson theories. Neither of them has been fully assessed so far with respect to load-separation curves. Focusing on the most important case of low fractal dimension (D f = 2.2) with extensive numerical studies we find that: (i) Persson's theory describes well the regime of intermediate pressures/contact area, but requires significant corrective factors: the latter depend also on upper wavevector cutoff of the roughness; hence, (ii) Persson's theory does not predict the correct functional dependence on magnification; (iii) asperity theories in the discrete version even neglecting interaction effects are more appropriate in the range of relatively large separations, also to take into consideration of the large scatter in actual realization of the surface.
Umfang:	Diagramme
ISSN:	2045-2322
DOI:	10.15480/882.1803