缺口幾何參數(shù)對軸類零件疲勞壽命的影響.pdf

1、蘭州理工大學碩士學位論文缺口幾何參數(shù)對軸類零件疲勞壽命的影響姓名：田利申請學位級別：碩士專業(yè)：機械制造及其自動化指導教師：李有堂20090420缺口兒何參數(shù)對軸類零件疲勞壽命的影響AbstractNaturalScienceFoundationofGansuProVinceinfhndingfortheaxesintheentirelifecycIeofthefatiguethatoftenappearintheissue，carrie

2、doutthenotchgeometr)rparametersonfatiguelifeofshaRimpactstudytoseektoestablishtheimpactoftheunineddescriptionoffatiguelifetoproVidethedesignparametersbasisandtheoreticaJbasisBasedonthefatiguestrengthofthetheor)rofsystemp

3、arametersonthenotchgeomet巧oftheimpactoffatiguelifeDiscussionofthefatiguelifepredictionoflocalstressstrainmethod，combinedwithmultiaxialfatiguelifepredictionofthought，tosuchef詫cthasbeentodamageparameteroffatiguelifepredict

4、ionmodelDiscussedthe矗niteelementanalysisofaxialshaftinthebasicmethodsandanalysis，usingANSYSsoftwaretoestablishanotchshaftintheestablishmentofthree—dimensionalsolidmodelaxis，loadingsolutionwasreVersedundertheconditionsoft

5、hegapneartherootsofthelocalstressstraindistributionConsideraroundaxisradiuspofthenotch，thenotchdepth辦andtheopeningangleaofthenotchandotherparametersweretherootofstressandstrainanalysisSelectVonMisesequiValentstressforthi

6、sarticlestudiedthenotch—shaftfatiguelifedamageparameter，combinedwithfiniteelementanalysisresultsundertheproportionalconstantamplitudeloadfatiguelifecalculationofthenotchshaftTheresultsshowthat：thenotchshaftfatiguelifeinc

7、reaseswiththeincreaseofradiusp，withthenotchincreasingdepth辦reduced；whenpand辦fixed，thenotchopeningangleo：oftheshaftfatiguelifeofasmalldegreeofinnuenceWhen口／6=O5inthesamep腸，withthedeViationan91e盧increases，thenotch—shaftfat

8、iguelifeofadownwardtrend；whenp腸之02，theimpactofnotch—shaftfatiguelifeisamajoffactorindeViationangleIdentinednotchtoreVersetheef詫ctsofloadparameterdescriptionWithnon—dimensionalstressintensityfactorasadesignbasisforthedisc

9、ussionofthenotchopeningangleaofthenondimensionalstressintensityfactoroftheimpactofthelawTheresultsshowthat：FortheparabolicnotchaxisteVersetheproblem，whenp／辦less，crtoZ(口／6)ontheimpactofthemoreremarkableInthispaper，theresu