汽车玻璃热弯钢化成形的数值模拟研究

《汽车玻璃热弯钢化成形的数值模拟研究》由会员上传分享，免费在线阅读，更多相关内容在学术论文-天天文库。

1、上海交通大学硕士学位论文汽车玻璃热弯钢化成形的数值模拟研究姓名：乔凌菲申请学位级别：硕士专业：材料加工工程指导教师：郭志英20060101上海交通大学硕士学位论文汽车玻璃热弯钢化成形的数值模拟研究NUMERICALSIMULATIONOFHOTBEND-FORMINGANDTEMPERINGOFAUTOMOTIVEGLASSABSTRACTHot-bendingandtemperingaretwokeystagesduringtheformingprocessofautomotiveglass.TheHot-bendingstagedeter

2、minesthefinalshapeofauto-glass,andthetemperingstagehasimportanteffectonthetemperingintensity.Thereforeitisnecessarytodeeplystudythestagesoftheformingprocessofautomotiveglass.Anexperimentalandtheoreticalresearchonthedeformationandstresswereperformedinthepaper.Experimentally,

3、thespecificheatofrawautomotiveglasswiththetemperaturedecreasingwasmeasuredwiththedifferentialscanningcalorimeter(DSC).Thethermalexpansionwasmeasuredwiththequartzexpansionapparatus.Onthebasisoftestresults,thedifferenceofthespecificheatbetweenincreasinganddecreasingtemperatur

4、ewasdiscussed,andthemathematicalmodelofspecificheatwasproposed.Alsotherelationshipbetweenthermalexpansionandtemperaturewasanalyzed,whichprovidedthebasicdataforhotbend-formingprocessofautomotiveglass.Basedontheviscoelasticlargedeformationtheory,bend-formingwasstudiedtheoreti

5、cally.Basedonthe3Dtransientheatconductionandthermal-structurecoupledtheory,themathematicalmodelsoftemperingstageweresetup.Numericalsimulationofbothhot-bendingandtemperingprocesswereinvestigatedwiththehelpofcomputertechnologyandFiniteElementMethod.Thedeformation,spring-backa

6、ndstressdistributionoftheformingprocesscanbeacquired.Integratednumericalsimulationofanactualautomotiveglassformingwascompleted.Thesimulationresultwascomparedwiththeexperimentalandactualdatum,anditcanbeconcludedthatthesimulationprecisionwasacceptableandreliable.Finally,combi

7、nedwiththenumericalsimulationtechnologyand–2–上海交通大学硕士学位论文汽车玻璃热弯钢化成形的数值模拟研究orthogonalexperimentdesignmethod,theinfluencesofprocessparametersonformingqualitywereinvestigated.Andtheprocessofoneparthasbeenoptimizedtoshortenthespring-backandimprovethesurfacetemperingstrength.KEY

8、WORDS:automotiveglass,hotbend-forming,temperingstress,numericalsimulation,orthogon