第18卷第2期材料研究学报、,01.18No.22004年4月aHINESEJoURNALoFMATERIALSRESBARCHADril2004
生物陶瓷材料的疲劳寿命预测
朱平,林忠钦・陈关龙t池田清彦。
(1.上海交通大学2.日本宫崎大学1
摘要采用断裂力学中的四点弯曲试验法,研究并预测了氧化铝和氧化锫陶瓷材料在大气和水环境中
的循环疲劳破坏挣性结果表明,在相同的应力条件下.氧化铝和氧化错冉瓷材料,尤其是氧化锆陶瓷,在
水环境中的疲劳寿命比大气中的低通过将预测结果与实验结果比较和对人造股关节的应用.验证丁这种
疲劳寿命预测方法的有效性和适用性.
关键词无机非金属材料。陶瓷材料.水环境.循环负荷,寿命预测
分类号TB321文章编号1005-3093(2004)02-0187-06
Predictionoffatiguelifetimeinbio-ceramics
ZHUPin91+LINZhongqin!CHENGuanlon91IkedaKiyohik02
(J.Schoolo,MechanicalandPowerEngineering,ShanghaiJiao%wUnivevsityjShanghaiP00030
2Department。,Mechanical跚sternsEngineertn9,MiIazakiUniversl札Japan)
ManuscriptreceivedMay13,2003;inrevisedformAugust20,2003.
+TowhomcorrespoⅡdenceshouldbeaddressedtTel:(021)62932660-118,
E—mail:pzhu@sjtu.edu.CD
ABSTRACTThecharacteristicsofcyclicfatiguefracturewerestudiedbythecrackgrowthtestsusingthefour-pointbendingmethodinbothenvironmentsofairandwaterforaluminaandzirconiaceramics.TheeffectofwaterenvironmentonthefatigueIiretimewasinvestigated.Theresultsshowedthatinthecaseofthesamestressapplied.thetimetofractureinwateriSIessthanthatinair.anditiSmoreremarkableforzirconiaThefatiguelifetimepredictionsagreequalitativelywiththeexperimentalresultsforcyclicfatigueofaluminaandzirconiainairandwaterenvironments.andthemethodofthefatigueIifetimepredictionwasappliedtoartificiaIhipioint.
KEYWORDSinorganicnon—metallicmaterials.ceramics.waterenvironment,cyclicloading.Iire-timeprediction
Theapplicationsofceramicsasbiomaterialhavebeenexpected.Glassceramics,aluminaandzirconiaareusefulmateriedsasbi01ceramics.Mostofbio_lceramicsareoxideceramicswhichundergofatiguebystresscorrosioncracking.Fhrthermore,whensuchceramicsateUSedforimplantmaterialssuch∞artificialjoints,theyundergocyclicloadingforafairlylongperiodincorrosiveenvironment.Thus,forpracticaluseandtoinvestigatethemechanismoffatiguefracture,itisimportanttoknowwhatfracturebehaviorisobservedundercyclicloadinginbothenvironmentsofairandwater,inparticulartheeffectofwaterenvironmentonthefatiguelifetime.AlthoughmanystudiesonfracturebehaviorofbiHeramicshavebeencarriedout{l”5】.theeffectofwaterenvironmentonthefatiguefractureandfatiguelifetimepredictionalmosthavenotbeenelucidated,inparticularforzirconia[s,71.
188材料研究学报18卷
Inthepresentstudy,thecrackgrowthtestswerecarriedoutundercyclicloadinginbothenvironmentsofairandwaterinordertoinvestigatetheeffectofwaterenvironmentonthefatiguelifetimeforaluminaandzirconia.Inaddition,the硒一Vcharacteristies[slwereusedtopredictthefatiguelifetimesundercyclicloadingandthepredictionswerecomparedwiththeexperimentalresults.
1Experimentalprocedures
Thematerialschoseninthisinvestigationaretwokindsofcommerciallyavailablealuminaandzirconia.TheirchemicalcompositionsandmechanicalpropertiesareshowninTables1,2and3.Theaveragegrainsizeobtainedfromtheobservationoffracturesurfaceisabout3“mto5“minalumina,0.5pmto1“minzirconia.
"Ihble1Chemicalcompositionin“umina血№fraction.%)
A1203MgOSi02Na20Fe203Ti02CaO
9970・0870.0620.03200120.0030042
Table2Chemicalcompositioninzirconia(ma∞fraction,%)
!!!!±璺塑!!!旦!皇!!!!!竺!!!!旦壁!旦!
!::竺!:::!:兰!:!!!!:竺!!:!!!
Table3Mechanicalproperties|naluminaandzirconia
MaterialDensityFracturetoughness确cBendingstrengthHardn∞sThermalconductivity
/g・cm~]MPa・m-1/2/MPa/HVl0/W.fm.K1—1
Alumina3944.41376164032.6
Zirconla6.075.00113613003.11
Thedimensionofbendingspecimensis40mm×20mmx3mm.WithVickersindentationtointroducepre-cracksatthecenterofthespecimens,wheretheloadtomarktheindentationis196Nandtheloadingtimeis30S,theprecrackedspecimenswereobtained.Thespecimenwassetonthefour-pointbendingdeviveandthepre-crackw粥Oilthetensilesurfaceofthespecimen.Incyclicloadingthespecimensweresubjectedtoasinusoidalcychcstresswithastressratio(minimumstress/maximumstress)of0.1andafrequencyof3Hz.Thecrackgrowthtestswereperformedinbothatmospheresofairwithrelativehumidity奇om40%to60%andionexchangedwater,wherethemaximumtestingtimeWaslimitedto5x105s(一139h、.
2Effectofwaterenvironmentonthefatiguelifetime
TheresultsofthecyclicfatiguetestsareshowninFig.1.Itshowstheloga㈣一log*fcrelation-shipforaluminaandzirconiainbothairandwaterenvironments.Thetimetofracturedecreaseswithincreasingtheappliedstress.Inthecaseofthesanlestressapplied,thetimetofracturein
2期朱平等:生物陶瓷材料的疲劳寿命预测189
waterislessthanthatinair,anditismoreremarkableforzirconia.Therefore,itisconsideredthatthefractureinaluminaoccursmainlyatgrainboundarieswhereSi02bondsexist,whilethefractureinzirconiaOCCurSatbothgrainboundariesandtheinteriorofthegrainduetostresscorrosioncrackingwithprincipalcomponentsofZr02andSi02.
口丑:、目£iTimetofailurefk/sTimetofailureif=/s
Fig.1Cyclicfatigueexperimentalresultsandlifetimepredictions(a)Alumina,(b)Zlrconia
3Fatiguelifetimepredictions
3.1Time—to—如i池Mpredictions
ItiscommonlyfoundthatthecrackvelocityVcanbeexpressedasapowerfunctionoftheapphedstressintensityfactor硒(9】
y=塞=^矸=K(急)“(1)
whereAandnarethecrackpropagationparameters,KisacrackvelocityatthecriticalstressintensityfactorKic.
Pre-cracksatthecenterofthespecimenswereproducedwithVickersindentationwhenthefatiguetestswerecarriedout.Theresidualstresswasproducedintheregionofpre-cracks.Sothestressintensityfactor%includestwoparts,oneisthetensilestressintensityfactor纸D,andtheotheristheresidualstressintensityfactor西e-【1q
KI=Ⅸ矗p+坼。。=Yo'aal/2+xP/一/2(2)
whereYistheshapefactorwhosevalueis2√百,O"aistheappliedstressandXisthematerialfactorwhichiscalculatedasshowninthefoUowingequation[“】
X=(3)
where口fisthefracturestress.
190材料研究学报
Eq.(1)froman18卷initialcrackThetime-to-failuret。forstaticfatigueisgivenbyintegrating
sizeaitoacriticalsizeac.
妊譬f耳da
Forcyclicfatiguethat
shouldbewrittenas[12】a(4)sinusoidalstress口=口maxsinwtisapplied,thetime-to-failuretc仁高
Evans’Sconvertingfactor
thematerial(5)whereRisthestress3.2ratio(Ormin/口…),g(n,R)istheComparisonwithexperimenSalresultsThecrackpropagationparameternandfactor×aresummarizedinTable4.
Thus,usingthecrackpropagationparameterndeterminedbythe
terialfactor×,thefactorcrackgrowthtest[…,thema-g(n,R),andthetime-to-failureundercyclicfatigueconditionscanbepredicted.
Table4Materialparametersinaluminaandzirconia
Fig.1showsthecomparisonbetweenthepredictionsforthefatiguelifetimeandtheexper-imentalresultsforcyclicfatigueofaluminaandzirconiainairandwaterenvironments.Thepredictionsagreequalitativelywiththeexperimentalresults.
Fig.2showsthefemoralshaftreplacedbyartificialhipjoint,whichisaddedbytheabductor
toforce.femoralhe甜forceandground-to-footreaction.Thebendingmomentapplied
shaftisseen
gtrethefemoraltobe16diameter0.8Ⅳ(口+2).ForthefemoralshaftitseIf,assumingthatmmand27mmandthebodyweightistakentobe700N,the
MPa.Forartificialhipjoint,theintroductionofatheinnerandoutermaximumstressdueatobendingis41.3femoralstemwillresultin
sharingofthebendingmomentintheratioofthebending
compositeissubjectedtostiffness.Whenmaximumthebone-cement-stemonbendinginthefrontalplane,the
cantensilestressthelateralsidesofthefemoralshaftbeexpressed‰一ME,18(E,/,+EBIB)兰2专”一一_‘iasfollows
(6)峥j
2期朱平等:生物陶瓷材料的疲劳寿命预测
where厶and/s
FemoraLheadforceare191secondmomentsofareaofthesectionforstemandbonerespectively,
最andEBaremodulusofelasticityforstem
andbonerespectively,disthediameterofstem.
Themaximumstresscalculatedforthreekinds
ofstemmaterialsofcobaltalloy(B=210GPa),
MPa,314MPaandalumina(E=364GPa)andzirconia(Es=140—200GPa)are221
157—207MPa,respectively.Itisfoundthatzir.
coniaiSthebestmaterialamongthosemateri-
aisfromthestandpointofstrengthofmateri-
Ms.Furthermore。whenfemoralstemofzirconia
thathasasemicircularcrackwithinitialcrack
sizeofi00“missubjectedtostaticandcyclic
loadingof700Nunderwaterenvironment,the
predicted1ifetimeisobtained(Table5).Itshows
thathfetimeabruptlydecreaseswith
the
Fig.2increasingstressFemoralshaft
stemreplacedbyartificialinzirconia.appliedstressandaddingcyclic
Table5Anexampleoflifetimepredictionsinartificialhipjointusingzirconiaa8femoralstem
垒坐垒
157
207!!塑!竺!竺些兰苎她丝437712!竺!竺!!竺型型型笪135
1.Inthecaseofthesamestressapplied,thetimetofractureobtainedfromthecyclicfatiguetestsinwaterdecreasesmorethanthatinairforaluminaandzirconia.anditismoreremarkableforzirconia.
2.Thefatiguelifetimepredictionsagreequalitativelywiththeexperimentalresultsforcyclic
ofaluminaandzirconiainairandwaterfatiguethemethodoftheenvironments,andfatigue
lifetimeprediction_wappliedtoartificialhipjoint.
R七ferences
1
2
3
4KEAebeHi,R.D.Rawlings,JMater.Sci.k.,2,215(19831T-Kawakubo,K・Komeya,J.Am.Cerara.Soc.,阳(6),400(1987)T・KawakuboIA.Goto,J.Soc.Mater.Sci.,37(419),939(1988)H・Sugawara,A・Otsuka,T.Amano,J.Soc.Mater.Sci.,40(458)。1491(1991)
192材料研究学报18卷
5
6
7
8Y.MiyashitatT.Hanseon,YMutoh,H.Kira,JSocTMater.Sci,4e(5),518(1997)Okabe,M.Kido,T.Miyahara,EngFracMech.,48.13711994)MaterialsResearch,16(5)H.Kobaya^h,T.Kawakubo,Metal.Bull..27,757(1988)ZHUPing,LINZhongqln,CHENGuanlong,IkedaKiyohiko,ChineseJournalof
479(2002)
(朱平,林忠钦,陈关龙,池田清彦,材料研究学报,
9
10
ll
1216(5),479(2002))A.G.Evans,J.MaterSci.,7,1137(1972)D.A.Krohn,D.P.H.Hasselman,J.Am.Cerarn.Soc.,55(4),208(1972)K.Ikeda,KOnizaki.KKalzu,AYoBhikawa。TransactionsoftheJSME。A-64,2542(1998)A.G.Bvam,E.R.Fuller,Metall.Trans.,5.27(1974)
生物陶瓷材料的疲劳寿命预测
作者:
作者单位:
刊名:
英文刊名:
年,卷(期):
被引用次数:朱平, 林忠钦, 陈关龙, 池田清彦朱平,林忠钦,陈关龙(上海交通大学), 池田清彦(日本宫崎大学)材料研究学报CHINESE JOURNAL OF MATERIALS RESEARCH2004,18(2)3次
参考文献(12条)
1.K E Aeberti;R D Rawlings 查看详情 1983(02)
2.T Kawakubo;K Komeya 查看详情 1987(06)
3.T Kawakubo;A Goto 查看详情 1988(37)
4.H Sugawara;A Otsuka;T Amano 查看详情 1991(40)
5.Y Miyashita;T Hansson;Y Mutoh;H Kita 查看详情 1997(05)
6.T Okabe;M Kido;T Miyahara 查看详情 1994(48)
7.H Kobayash;T Kawakubo 查看详情 1988(27)
8.朱平,林忠钦,陈关龙,池田清彦 几种生物陶瓷材料的裂纹扩展特性[期刊论文]-材料研究学报 2002(5)
9.A G Evans 查看详情 1972(07)
10.D A Krohn;D P H Hasselman 查看详情 1972(04)
11.K Ikeda;K Onizaki;K Kaizu 查看详情 1998
12.A G Evans;E R Fuller 查看详情 1974(05)
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2. 章庆国.赵士芳.郭宗科.董寅生.林萍华.浦跃朴 纳米相陶瓷支架与人成骨细胞生物相容性的体外实验研究[期刊论文]-东南大学学报(自然科学版)2004,34(2)
3. 王竹菊.韩文波.陶树青.Wang Zhu-ju.Han Wen-bo.Tao Shu-qing 纳米羟基磷灰石-二氧化锆生物陶瓷材料刀片切割伤口的愈合[期刊论文]-中国组织工程研究与临床康复2007,11(26)
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引用本文格式:朱平.林忠钦.陈关龙.池田清彦 生物陶瓷材料的疲劳寿命预测[期刊论文]-材料研究学报 2004(2)
第18卷第2期材料研究学报、,01.18No.22004年4月aHINESEJoURNALoFMATERIALSRESBARCHADril2004
生物陶瓷材料的疲劳寿命预测
朱平,林忠钦・陈关龙t池田清彦。
(1.上海交通大学2.日本宫崎大学1
摘要采用断裂力学中的四点弯曲试验法,研究并预测了氧化铝和氧化锫陶瓷材料在大气和水环境中
的循环疲劳破坏挣性结果表明,在相同的应力条件下.氧化铝和氧化错冉瓷材料,尤其是氧化锆陶瓷,在
水环境中的疲劳寿命比大气中的低通过将预测结果与实验结果比较和对人造股关节的应用.验证丁这种
疲劳寿命预测方法的有效性和适用性.
关键词无机非金属材料。陶瓷材料.水环境.循环负荷,寿命预测
分类号TB321文章编号1005-3093(2004)02-0187-06
Predictionoffatiguelifetimeinbio-ceramics
ZHUPin91+LINZhongqin!CHENGuanlon91IkedaKiyohik02
(J.Schoolo,MechanicalandPowerEngineering,ShanghaiJiao%wUnivevsityjShanghaiP00030
2Department。,Mechanical跚sternsEngineertn9,MiIazakiUniversl札Japan)
ManuscriptreceivedMay13,2003;inrevisedformAugust20,2003.
+TowhomcorrespoⅡdenceshouldbeaddressedtTel:(021)62932660-118,
E—mail:pzhu@sjtu.edu.CD
ABSTRACTThecharacteristicsofcyclicfatiguefracturewerestudiedbythecrackgrowthtestsusingthefour-pointbendingmethodinbothenvironmentsofairandwaterforaluminaandzirconiaceramics.TheeffectofwaterenvironmentonthefatigueIiretimewasinvestigated.Theresultsshowedthatinthecaseofthesamestressapplied.thetimetofractureinwateriSIessthanthatinair.anditiSmoreremarkableforzirconiaThefatiguelifetimepredictionsagreequalitativelywiththeexperimentalresultsforcyclicfatigueofaluminaandzirconiainairandwaterenvironments.andthemethodofthefatigueIifetimepredictionwasappliedtoartificiaIhipioint.
KEYWORDSinorganicnon—metallicmaterials.ceramics.waterenvironment,cyclicloading.Iire-timeprediction
Theapplicationsofceramicsasbiomaterialhavebeenexpected.Glassceramics,aluminaandzirconiaareusefulmateriedsasbi01ceramics.Mostofbio_lceramicsareoxideceramicswhichundergofatiguebystresscorrosioncracking.Fhrthermore,whensuchceramicsateUSedforimplantmaterialssuch∞artificialjoints,theyundergocyclicloadingforafairlylongperiodincorrosiveenvironment.Thus,forpracticaluseandtoinvestigatethemechanismoffatiguefracture,itisimportanttoknowwhatfracturebehaviorisobservedundercyclicloadinginbothenvironmentsofairandwater,inparticulartheeffectofwaterenvironmentonthefatiguelifetime.AlthoughmanystudiesonfracturebehaviorofbiHeramicshavebeencarriedout{l”5】.theeffectofwaterenvironmentonthefatiguefractureandfatiguelifetimepredictionalmosthavenotbeenelucidated,inparticularforzirconia[s,71.
188材料研究学报18卷
Inthepresentstudy,thecrackgrowthtestswerecarriedoutundercyclicloadinginbothenvironmentsofairandwaterinordertoinvestigatetheeffectofwaterenvironmentonthefatiguelifetimeforaluminaandzirconia.Inaddition,the硒一Vcharacteristies[slwereusedtopredictthefatiguelifetimesundercyclicloadingandthepredictionswerecomparedwiththeexperimentalresults.
1Experimentalprocedures
Thematerialschoseninthisinvestigationaretwokindsofcommerciallyavailablealuminaandzirconia.TheirchemicalcompositionsandmechanicalpropertiesareshowninTables1,2and3.Theaveragegrainsizeobtainedfromtheobservationoffracturesurfaceisabout3“mto5“minalumina,0.5pmto1“minzirconia.
"Ihble1Chemicalcompositionin“umina血№fraction.%)
A1203MgOSi02Na20Fe203Ti02CaO
9970・0870.0620.03200120.0030042
Table2Chemicalcompositioninzirconia(ma∞fraction,%)
!!!!±璺塑!!!旦!皇!!!!!竺!!!!旦壁!旦!
!::竺!:::!:兰!:!!!!:竺!!:!!!
Table3Mechanicalproperties|naluminaandzirconia
MaterialDensityFracturetoughness确cBendingstrengthHardn∞sThermalconductivity
/g・cm~]MPa・m-1/2/MPa/HVl0/W.fm.K1—1
Alumina3944.41376164032.6
Zirconla6.075.00113613003.11
Thedimensionofbendingspecimensis40mm×20mmx3mm.WithVickersindentationtointroducepre-cracksatthecenterofthespecimens,wheretheloadtomarktheindentationis196Nandtheloadingtimeis30S,theprecrackedspecimenswereobtained.Thespecimenwassetonthefour-pointbendingdeviveandthepre-crackw粥Oilthetensilesurfaceofthespecimen.Incyclicloadingthespecimensweresubjectedtoasinusoidalcychcstresswithastressratio(minimumstress/maximumstress)of0.1andafrequencyof3Hz.Thecrackgrowthtestswereperformedinbothatmospheresofairwithrelativehumidity奇om40%to60%andionexchangedwater,wherethemaximumtestingtimeWaslimitedto5x105s(一139h、.
2Effectofwaterenvironmentonthefatiguelifetime
TheresultsofthecyclicfatiguetestsareshowninFig.1.Itshowstheloga㈣一log*fcrelation-shipforaluminaandzirconiainbothairandwaterenvironments.Thetimetofracturedecreaseswithincreasingtheappliedstress.Inthecaseofthesanlestressapplied,thetimetofracturein
2期朱平等:生物陶瓷材料的疲劳寿命预测189
waterislessthanthatinair,anditismoreremarkableforzirconia.Therefore,itisconsideredthatthefractureinaluminaoccursmainlyatgrainboundarieswhereSi02bondsexist,whilethefractureinzirconiaOCCurSatbothgrainboundariesandtheinteriorofthegrainduetostresscorrosioncrackingwithprincipalcomponentsofZr02andSi02.
口丑:、目£iTimetofailurefk/sTimetofailureif=/s
Fig.1Cyclicfatigueexperimentalresultsandlifetimepredictions(a)Alumina,(b)Zlrconia
3Fatiguelifetimepredictions
3.1Time—to—如i池Mpredictions
ItiscommonlyfoundthatthecrackvelocityVcanbeexpressedasapowerfunctionoftheapphedstressintensityfactor硒(9】
y=塞=^矸=K(急)“(1)
whereAandnarethecrackpropagationparameters,KisacrackvelocityatthecriticalstressintensityfactorKic.
Pre-cracksatthecenterofthespecimenswereproducedwithVickersindentationwhenthefatiguetestswerecarriedout.Theresidualstresswasproducedintheregionofpre-cracks.Sothestressintensityfactor%includestwoparts,oneisthetensilestressintensityfactor纸D,andtheotheristheresidualstressintensityfactor西e-【1q
KI=Ⅸ矗p+坼。。=Yo'aal/2+xP/一/2(2)
whereYistheshapefactorwhosevalueis2√百,O"aistheappliedstressandXisthematerialfactorwhichiscalculatedasshowninthefoUowingequation[“】
X=(3)
where口fisthefracturestress.
190材料研究学报
Eq.(1)froman18卷initialcrackThetime-to-failuret。forstaticfatigueisgivenbyintegrating
sizeaitoacriticalsizeac.
妊譬f耳da
Forcyclicfatiguethat
shouldbewrittenas[12】a(4)sinusoidalstress口=口maxsinwtisapplied,thetime-to-failuretc仁高
Evans’Sconvertingfactor
thematerial(5)whereRisthestress3.2ratio(Ormin/口…),g(n,R)istheComparisonwithexperimenSalresultsThecrackpropagationparameternandfactor×aresummarizedinTable4.
Thus,usingthecrackpropagationparameterndeterminedbythe
terialfactor×,thefactorcrackgrowthtest[…,thema-g(n,R),andthetime-to-failureundercyclicfatigueconditionscanbepredicted.
Table4Materialparametersinaluminaandzirconia
Fig.1showsthecomparisonbetweenthepredictionsforthefatiguelifetimeandtheexper-imentalresultsforcyclicfatigueofaluminaandzirconiainairandwaterenvironments.Thepredictionsagreequalitativelywiththeexperimentalresults.
Fig.2showsthefemoralshaftreplacedbyartificialhipjoint,whichisaddedbytheabductor
toforce.femoralhe甜forceandground-to-footreaction.Thebendingmomentapplied
shaftisseen
gtrethefemoraltobe16diameter0.8Ⅳ(口+2).ForthefemoralshaftitseIf,assumingthatmmand27mmandthebodyweightistakentobe700N,the
MPa.Forartificialhipjoint,theintroductionofatheinnerandoutermaximumstressdueatobendingis41.3femoralstemwillresultin
sharingofthebendingmomentintheratioofthebending
compositeissubjectedtostiffness.Whenmaximumthebone-cement-stemonbendinginthefrontalplane,the
cantensilestressthelateralsidesofthefemoralshaftbeexpressed‰一ME,18(E,/,+EBIB)兰2专”一一_‘iasfollows
(6)峥j
2期朱平等:生物陶瓷材料的疲劳寿命预测
where厶and/s
FemoraLheadforceare191secondmomentsofareaofthesectionforstemandbonerespectively,
最andEBaremodulusofelasticityforstem
andbonerespectively,disthediameterofstem.
Themaximumstresscalculatedforthreekinds
ofstemmaterialsofcobaltalloy(B=210GPa),
MPa,314MPaandalumina(E=364GPa)andzirconia(Es=140—200GPa)are221
157—207MPa,respectively.Itisfoundthatzir.
coniaiSthebestmaterialamongthosemateri-
aisfromthestandpointofstrengthofmateri-
Ms.Furthermore。whenfemoralstemofzirconia
thathasasemicircularcrackwithinitialcrack
sizeofi00“missubjectedtostaticandcyclic
loadingof700Nunderwaterenvironment,the
predicted1ifetimeisobtained(Table5).Itshows
thathfetimeabruptlydecreaseswith
the
Fig.2increasingstressFemoralshaft
stemreplacedbyartificialinzirconia.appliedstressandaddingcyclic
Table5Anexampleoflifetimepredictionsinartificialhipjointusingzirconiaa8femoralstem
垒坐垒
157
207!!塑!竺!竺些兰苎她丝437712!竺!竺!!竺型型型笪135
1.Inthecaseofthesamestressapplied,thetimetofractureobtainedfromthecyclicfatiguetestsinwaterdecreasesmorethanthatinairforaluminaandzirconia.anditismoreremarkableforzirconia.
2.Thefatiguelifetimepredictionsagreequalitativelywiththeexperimentalresultsforcyclic
ofaluminaandzirconiainairandwaterfatiguethemethodoftheenvironments,andfatigue
lifetimeprediction_wappliedtoartificialhipjoint.
R七ferences
1
2
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生物陶瓷材料的疲劳寿命预测
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被引用次数:朱平, 林忠钦, 陈关龙, 池田清彦朱平,林忠钦,陈关龙(上海交通大学), 池田清彦(日本宫崎大学)材料研究学报CHINESE JOURNAL OF MATERIALS RESEARCH2004,18(2)3次
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