TheEstablishmentofFatigueLifeModelofGeryCastIronCylinderHeadsBasedonMechanicalFatigueTests

TheEstablishmentofFatigueLifeModelofGeryCastIronCylinderHeadsBasedonMechanicalFatigueTests.pdf
Fatigueisthemainfailuremodeofengine'scomplicatedcomponentslikecylinderheads.Hence,anaccuratelifemodelwouldhelpdirectanti-fatiguemethods.However,becausecylinderheadsundergocomplexthermalandmechanicalloadings,itwouldbeverydifficulttoconducttestswhichcancompletelysimulatethethermo-mechanicalfatiguecondition.Inthisstudy,inordertoevaluatethefatiguetimeofcylinderheadswithhighefficiency,sincecylinderheads'lifetimesaredecidedbythelowcyclefatigueareasonitsfiredeck,thiscriticallocationshouldbehighlighted.Anear-components-shapedspecimen“valvebridgesample”weredesignedandthentestedonaone-waypull-pressfatiguemachine.Bycomparingthemeasuredfatiguelifetimesfromteststothecalculatedonesfromfourlifepredictionformulas,apreferableformulawasselectedtoestablishtheoriginallifetimemodel.Then,takingintoaccountthatmaterialrelatedparameterslikeyieldlimitwoulddecreaseunderhightemperature,theoriginallifetimemodelwascorrectedbyadoptingthetemperaturefactor“t”.Finally,theavailabilityandaccuracyofthelifemodelwerevalidated.
作者：WangHuiChengYing
作者单位：SchoolofMechanicalEngineering,BeijingInstituteofTechnology
母体文献：2016中国汽车工程学会年会论文集
会议名称：2016中国汽车工程学会年会  
会议时间：2016年10月26日
会议地点：上海
主办单位：中国汽车工程学会
语种：chi
分类号：
关键词：cylinderhead  greycastiron  lifemodel  mechanicalfatiguetests
在线出版日期：2019年4月25日
基金项目：
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TheEstablishmentofFatigueLifeModelofGeryCastIronCylinderHeadsBasedonMechanicalFatigueTests.pdf

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