Stiffness and deformation of asperities in a rough contact
Identifieur interne : 000386 ( France/Analysis ); précédent : 000385; suivant : 000387Stiffness and deformation of asperities in a rough contact
Auteurs : A. Haïahem [Algérie] ; L. Flamand [France]Source :
Descripteurs français
- Pascal (Inist)
- Wicri :
- topic : Nickel.
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Abstract
In rough contacts the load is transmitted through the micro-contacts generated the interactions between the asperities. These micro-contacts are submitted by pressures and important stresses appear in the superficial layers close to the surface which lead to plastic deformation of the asperities. In our experimental work, we study the contact between a rough surface and a flat supphire. The samples used are Nickel electroformaging with quasi-sinusoïdal roughness. The elastic and plastic parts of the deformation process of the roughness are determined, the experimental apparatus is composed of the loading system and an interferometric microscope in order to measure deformations. The values of the elastic deformation are compared to the theoretical results and the plastic ones with those obtained by using a profilometer coupled with the computer. Finally we deduce the asperity stiffness which are compared to those of the bodies. The results show the primary loading. The interacting asperities are loaded as well as the bodies. Then the elastic deformation and the stiffness are the main functions of the roughness' slope ( ratio of the asperity height to the wavelength (Rt/ λ)). The asperity stiffness is very high compared to those of the bodies.
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Pascal:00-0412375Le document en format XML
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Flamand</name><affiliation wicri:level="3"><inist:fA14 i1="02"><s1>Laboratoire de mécanique des contacts INSA de Lyon</s1><s2>69621 Villeurbanne</s2><s3>FRA</s3><sZ>2 aut.</sZ></inist:fA14><country>France</country><placeName><region type="region" nuts="2">Auvergne-Rhône-Alpes</region><region type="old region" nuts="2">Rhône-Alpes</region><settlement type="city">Villeurbanne</settlement></placeName></affiliation></author></titleStmt><publicationStmt><idno type="wicri:source">INIST</idno><idno type="inist">00-0412375</idno><date when="1999">1999</date><idno type="stanalyst">PASCAL 00-0412375 INIST</idno><idno type="RBID">Pascal:00-0412375</idno><idno type="wicri:Area/PascalFrancis/Corpus">000428</idno><idno type="wicri:Area/PascalFrancis/Curation">000013</idno><idno type="wicri:Area/PascalFrancis/Checkpoint">000446</idno><idno type="wicri:explorRef" wicri:stream="PascalFrancis" wicri:step="Checkpoint">000446</idno><idno type="wicri:Area/Main/Merge">000C95</idno><idno type="wicri:Area/Main/Curation">000C58</idno><idno type="wicri:Area/Main/Exploration">000C58</idno><idno type="wicri:Area/France/Extraction">000386</idno></publicationStmt><sourceDesc><biblStruct><analytic><title xml:lang="en" level="a">Stiffness and deformation of asperities in a rough contact</title><author><name sortKey="Haiahem, A" sort="Haiahem, A" uniqKey="Haiahem A" first="A." last="Haïahem">A. Haïahem</name><affiliation wicri:level="1"><inist:fA14 i1="01"><s1>Institut ae mécanique université de Annaba, BP 12</s1><s2>Annaba 23000</s2><s3>DZA</s3><sZ>1 aut.</sZ></inist:fA14><country>Algérie</country><wicri:noRegion>Annaba 23000</wicri:noRegion></affiliation></author><author><name sortKey="Flamand, L" sort="Flamand, L" uniqKey="Flamand L" first="L." last="Flamand">L. Flamand</name><affiliation wicri:level="3"><inist:fA14 i1="02"><s1>Laboratoire de mécanique des contacts INSA de Lyon</s1><s2>69621 Villeurbanne</s2><s3>FRA</s3><sZ>2 aut.</sZ></inist:fA14><country>France</country><placeName><region type="region" nuts="2">Auvergne-Rhône-Alpes</region><region type="old region" nuts="2">Rhône-Alpes</region><settlement type="city">Villeurbanne</settlement></placeName></affiliation></author></analytic></biblStruct></sourceDesc></fileDesc><profileDesc><textClass><keywords scheme="KwdEn" xml:lang="en"><term>Contact stress</term><term>Elastoplasticity</term><term>Experimental study</term><term>Inelasticity</term><term>Microscopy</term><term>Nickel</term><term>Optical interferometry</term><term>Rough surface</term><term>Roughness</term><term>Testing equipment</term><term>Tribology</term></keywords><keywords scheme="Pascal" xml:lang="fr"><term>Tribologie</term><term>Contrainte contact</term><term>Rugosité</term><term>Surface rugueuse</term><term>Inélasticité</term><term>Elastoplasticité</term><term>Nickel</term><term>Etude expérimentale</term><term>Appareillage essai</term><term>Microscopie</term><term>Interférométrie optique</term></keywords><keywords scheme="Wicri" type="topic" xml:lang="fr"><term>Nickel</term></keywords></textClass></profileDesc></teiHeader><front><div type="abstract" xml:lang="en">In rough contacts the load is transmitted through the micro-contacts generated the interactions between the asperities. These micro-contacts are submitted by pressures and important stresses appear in the superficial layers close to the surface which lead to plastic deformation of the asperities. In our experimental work, we study the contact between a rough surface and a flat supphire. The samples used are Nickel electroformaging with quasi-sinusoïdal roughness. The elastic and plastic parts of the deformation process of the roughness are determined, the experimental apparatus is composed of the loading system and an interferometric microscope in order to measure deformations. The values of the elastic deformation are compared to the theoretical results and the plastic ones with those obtained by using a profilometer coupled with the computer. Finally we deduce the asperity stiffness which are compared to those of the bodies. The results show the primary loading. The interacting asperities are loaded as well as the bodies. Then the elastic deformation and the stiffness are the main functions of the roughness' slope ( ratio of the asperity height to the wavelength (R<sub>t</sub>/ λ)). The asperity stiffness is very high compared to those of the bodies.</div></front></TEI><affiliations><list><country><li>Algérie</li><li>France</li></country><region><li>Auvergne-Rhône-Alpes</li><li>Rhône-Alpes</li></region><settlement><li>Villeurbanne</li></settlement></list><tree><country name="Algérie"><noRegion><name sortKey="Haiahem, A" sort="Haiahem, A" uniqKey="Haiahem A" first="A." last="Haïahem">A. Haïahem</name></noRegion></country><country name="France"><region name="Auvergne-Rhône-Alpes"><name sortKey="Flamand, L" sort="Flamand, L" uniqKey="Flamand L" first="L." last="Flamand">L. Flamand</name></region></country></tree></affiliations></record>Pour manipuler ce document sous Unix (Dilib)
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