Materials selection and design considerations Chapter 22.pdf

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1、1496T_c22_W86-W1343/1/0615:17PageW86Chapter22MaterialsSelectionandDesignConsiderationsPhotographshowingthecomponentsofanartificialtotalhipreplacement(inexplodedperspective).Thesecomponentsare(fromlefttoright)asfollows:femoralstem,ball,acetabularcupinsert,andacetabularcup.(Photographc

2、ourtesyofZimmer,Inc.,Warsaw,IN,USA.)WHYSTUDYMaterialsSelectionandDesignConsiderations?Perhapsoneofthemostimportanttasksthatanfore,itisessentialthattheengineeringstudentbe-engineermaybecalledupontoperformisthatofcomefamiliarwithandversedintheproceduresandmaterialsselectionwithregardto

3、componentdesign.protocolsthatarenormallyemployedinthisprocess.InappropriateorimproperdecisionscanbedisastrousThischapterdiscussesmaterialsselectionissuesinfrombotheconomicandsafetyperspectives.There-severalcontextsandfromvariousperspectives.W86•1496T_c22_W86-W1343/1/0615:17PageW87Lea

4、rningObjectivesAftercarefulstudyofthischapteryoushouldbeabletodothefollowing:1.Describehowthestrengthperformanceindex6.Namethefourcomponentsfoundintheartifi-forasolidcylindricalshaftisdetermined.cialhipreplacement,and,foreach,listitsspe-2.Describethemannerinwhichmaterialsselec-cificm

5、aterialrequirements.tionchartsareemployedinthematerialsselec-7.Nameandbrieflydefinethetwofactorsthattionprocess.areimportanttoconsiderrelativetothesuit-3.Brieflydescribethestepsthatareusedtoascer-abilityofamaterialforuseforchemicalprotec-tainwhetherornotaparticularmetalalloyistiveclo

6、thing.suitableforuseinanautomobilevalvespring.8.Describethecomponentsandtheirfunctionsfor4.Brieflydescribethedifferenceinsurfacefeaturesanintegratedcircuitleadframe.(asobservedinscanningelectronmicrographs)9.(a)Nameandbrieflydescribethethreeforasteelalloythat(a)experiencedaductilepro

7、cessesthatarecarriedoutduringintegratedfracture,and(b)failedinabrittlemanner.circuitpackaging.(b)Notepropertyrequire-5.Listandbrieflyexplainsixbiocompatibilitycon-mentsforeachoftheseprocesses,and,insiderationsrelativetomaterialsthatareem-addition,citeatleasttwomaterialsthatareployedi

8、nartificialh