含缺陷工程材料的剩余強度分析.pdf

1、；蟹losii影’，：：、＼?！菀弧！苣谩，未鬟耄唾荔1’，一。。蒜矮摹零睜Ⅲ二冀一墊望指皇剁警二毒≥‘。”耄孥警萼攀訾—警譬專學。斜雩瑟霉話：：：i童二趣左璺：乏。一，一‘、、√，，n克茬：。目：至墨鹽盤煎魁l鰱：7，～一一論j完成阿制：：：二：二鲴!生月：：：：j。山東恥T人學碩J二學位論文英文摘要AbstraetBasedonthetheoryoffracturemechanicsanddamagemechanics，thefr

2、acturestrengthisanalyzedforseveralengineeringmaterialsThematerialfracturepropertiesisresearchedbyfractureexperiment，thetestdataiscomparedwiththecalculationresultsInthisdissertation，thefollowingcontentsarestudiedconcretel

3、y：(1)Formetalbarwithcircumferentialnotch，aseriesoftestsamplesareloadedbytensionequipmentFromthedataofexperiment，severalstrengthindexesarecalculatedandcomparedwitheachotherThestressdistributionofmetalbariSalsocalculatedwi

4、thfiniteelementSOftware(2)Basedonthefracturecriterionandtheanalysisofcrackcohesiveforce，thestressintensityfactorofmaterialsstructureiscalculatedandthecomputationformulaofloadingcapacityforthenotchbarisdeducedwiththenonli

5、nearfracturetheoryThree—pointbendingbeams，tensilebarsandtorsionsamplesaretestedandtheexperimentresultsarecomparedwitllthenumericalresults(3)AfterthesamplesofCFRPandGFRPsheetsareprefabricated，materialofFRParetestedwithuni

6、axestensionandwiththefour—pointbendingbeams，thenthetestingresultsoftwomethodsareanalyzedwitheachother(4)ThestrainsheetsareadheredonthesurfaceofCFRPoffourpointbendingconcretebeamorthree—pointbendingbeamofcastironWiththeel

7、ectromotivemethod，thetWOkindsofsamplesaretestedonequipment，andthefractureparametersoftwokindsofmaterialsareanalyzedrespectively(5)Aseriesofquasi—compacttensilespecimensofconcretearetestedFromtheexperimentdata，theloadingc

8、apabilityiscalculatedwiththecrackcohesiveforceanddoubleKmodel；then，thefractureparametersandsizeeffectsofconcretearediscussedCombinedwiththetheoryoffracture，thefracturepropertiesofengineeringmaterialsformetal，F(xiàn)RPandconcre