生物摩擦学BiotribologyGeneral

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1、OutlineIntroduction:Tribology&BiotribologyBiotribologyExamplesofBiotribologySkinArtificialheartDentalFracturefixationFlowofredbloodcellsOcularsystemSynovialjointsFutureDevelopmentsDefinitionthestudyoftribes?thestudyofhairasinTrichology?Try-biology?TribologyDefinitionTribology:"Tribo-,Gr.Tri

2、bos-(is):rubbing;-logy:namesofsciencesordepartmentsofstudy“Thebranchofscienceandtechnologyconcernedwithinteractingsurfacesinrelativemotionandwithassociatedmatters(asfriction,wear,lubrication,andthedesignofbearings).OxfordEnglishDictionary“Thescienceandtechnologyofinteractingsurfacesinre

3、lativemotionandthepracticesrelatedthereto”JostReport(1966)Surfaces,friction,wearandlubricationDefinitionhttp://www.shef.ac.uk/mecheng/mecheng_cms/tribology/DefinitionBiotribology:Allaspectsoftribologyrelatedtobiologicalsystems(ProfessorDuncanDowosnandProfessorVernaWright,UniversityofLeeds,1

4、973)Dental,skin,clothes,hair,footwear,contactlensandeye,replacementheartvalves,fracturerepair,pleuralandpericardium,andnaturalsynovialjointsandartificialreplacements.Surfaces"GodmadematerialsbutsurfacesweretheworkoftheDevil."Pauli,NobelPrizeforPhysics,1945http://www.maitrise-orthop.comDowso

5、netal,JArthroplasty,2004SurfacesAllsurfacesarerough:Atomicdiameters1to10ÅIrregularitiesonmica20ÅQuartzcrystal100ÅCeramicsurfaces0.005m(50Å)Metallicsurfaces0.005to0.01m(100Å)1angstrom(Å)=10-10m=10-4mmSurfacesSurfaceshttp://www.maitrise-orthop.com/corpusmaitri/index_us.html,ADambreville*,

6、MPhillipe**,ARay***,*CliniqueSt-Michel,29000Quimper,**HôpitaldeCarpentras4200CARPENTRAS,***ClinqueduParc69458LYONCEDEX-FranceSurfacesProfilometryNon-contactingsuchaslaserorwhitelightContactingsuchasstylusmethodAverageroughness(Ra)LSurfacesSameRa,butnotsametribologyandotherroughnessparameter

7、sarealsorequired!UseofRawithcaution!FrictionFrictionislooselydefinedastheresistancetomotion.LeonardodaVinci(AD1452–1519)FrictionAmontons,1699Theforceoffriction(F)isdirectlyproportionaltotheappliedload(w)Theforceoffriction(F)isindependentoftheapparentarea