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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: | , , , , |
| 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
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| Gesamtaufnahme: |
: Scientific reports, Bd. 7.2017, Art.-Nr. 6900, insges. 7 Seiten
, volume:7 |
| Schlagwörter: | |
| Quelle: | Verbunddaten SWB Lizenzfreie Online-Ressourcen |
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| 520 | |a 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. | ||
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| author | Papangelo, Antonio, Hoffmann, Norbert, Ciavarella, Michele |
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| contents | 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. |
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| spelling | Papangelo, Antonio VerfasserIn (DE-588)1171177372 (DE-627)1040423205 (DE-576)513635602 aut, Load-separation curves for the contact of self-affine rough surfaces Antonio Papangelo, Norbert Hoffmann & Michele Ciavarella, 2017, Diagramme, Text txt rdacontent, Computermedien c rdamedia, Online-Ressource cr rdacarrier, 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., wavevector, valves, thermal conductance, lubrication, Hoffmann, Norbert 1969- VerfasserIn (DE-588)113319978X (DE-627)888702930 (DE-576)489158145 aut, Ciavarella, Michele VerfasserIn (DE-588)1171159951 (DE-627)1040399517 (DE-576)513617620 aut, Technische Universität Hamburg Sonstige Körperschaft (DE-588)1112763473 (DE-627)866918418 (DE-576)476770564 oth, Technische Universität Hamburg-Harburg Dynamics Group Sonstige Körperschaft (DE-588)1095133209 (DE-627)855624663 (DE-576)462907325 oth, Enthalten in Scientific reports [London] : Macmillan Publishers Limited, part of Springer Nature, 2011 Bd. 7.2017, Art.-Nr. 6900, insges. 7 Seiten Online-Ressource (DE-627)663366712 (DE-600)2615211-3 (DE-576)346641179 2045-2322 nnns, volume:7 year:2017, http://nbn-resolving.de/urn:nbn:de:gbv:830-88223445 Resolving-System kostenfrei Volltext, https://doi.org/10.15480/882.1803 Resolving-System kostenfrei Volltext, http://hdl.handle.net/11420/1806 Resolving-System kostenfrei Volltext, https://doi.org/10.1038%2Fs41598-017-07234-4 Verlag Volltext, https://doi.org/10.15480/882.1803 LFER, LFER 2019-05-29T00:00:00Z |
| spellingShingle | Papangelo, Antonio, Hoffmann, Norbert, Ciavarella, Michele, Load-separation curves for the contact of self-affine rough surfaces, 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., wavevector, valves, thermal conductance, lubrication |
| title | Load-separation curves for the contact of self-affine rough surfaces |
| title_auth | Load-separation curves for the contact of self-affine rough surfaces |
| title_full | Load-separation curves for the contact of self-affine rough surfaces Antonio Papangelo, Norbert Hoffmann & Michele Ciavarella |
| title_fullStr | Load-separation curves for the contact of self-affine rough surfaces Antonio Papangelo, Norbert Hoffmann & Michele Ciavarella |
| title_full_unstemmed | Load-separation curves for the contact of self-affine rough surfaces Antonio Papangelo, Norbert Hoffmann & Michele Ciavarella |
| title_in_hierarchy | Load-separation curves for the contact of self-affine rough surfaces / Antonio Papangelo, Norbert Hoffmann & Michele Ciavarella, |
| title_short | Load-separation curves for the contact of self-affine rough surfaces |
| title_sort | load separation curves for the contact of self affine rough surfaces |
| title_unstemmed | Load-separation curves for the contact of self-affine rough surfaces |
| topic | wavevector, valves, thermal conductance, lubrication |
| topic_facet | wavevector, valves, thermal conductance, lubrication |
| url | http://nbn-resolving.de/urn:nbn:de:gbv:830-88223445, https://doi.org/10.15480/882.1803, http://hdl.handle.net/11420/1806, https://doi.org/10.1038%2Fs41598-017-07234-4 |
| urn | urn:nbn:de:gbv:830-88223445 |