優(yōu)質(zhì)碳素結(jié)構(gòu)鋼溫度和速率相依型本構(gòu)模型研究.pdf

1、湘潭大學(xué)碩士學(xué)位論文優(yōu)質(zhì)碳素結(jié)構(gòu)鋼溫度和速率相依型本構(gòu)模型研究姓名：楊柳申請學(xué)位級別：碩士專業(yè)：一般力學(xué)與力學(xué)基礎(chǔ)指導(dǎo)教師：羅迎社20040501瀨潭大學(xué)工學(xué)疆士學(xué)位論文AbstractCarbonconstructionalqualitysteelshavebeenwidelyusedinmodemautomobileandaeronauticindustryHugeinvestmentsareputtooptimizetheirpr

2、oduction。Recentlyfollowingtherapiddevelopmentofcomputertechnologyandthegradualadvancementofnumericalmethod、semianalyticalnumericalmethod，thefiniteelementmodelingtechnologyhasbecomethemostpracticalandconvenientwayInordert

3、oachievethenumericalsimulationcalculatingofrheologicalformingprocessofmaterials，itiSnecessarytofoundtheconstitutiveequationsthattherheologicalpropertiesofmaterialsunderhotworkingconditionaredescribedmoreaccuratelyInthist

4、hesis，thebasicfactorsrelatingtotherheologicalstressintheconstitutiveequationsareintroducedsystematicallyCarbonconstructionalqualitysteelsareregardedasakindofelastic—viscoplasticmaterialsunderhi醢tempemWreTheelastic—viscop

5、lasticconstitutivemodelsaresummarized，meanwhiletheparametricvariationalprinciplehasbeencarriedout。Aseriesoftensionexperimentsunderthesametemperatureanddifferentstrainrates，underthesamestrainrateanddifferenttemperatureswe

6、redoneon20steel，35steeland45steel。Weobtained52groupsofrheologicalstressstrainCL玨VCS。TheexperimentalresultswereanalyzedtheoreticallyFurthermore，take20steelasanexample，therheologicalstressconstitutivemodelsofcarbonsteelsar

7、ebuiltcombiningthestrongpointsofthePerzynamodelandJohnsonCookmodelComparingthecalculationresultsconductedfromthemodelwiththeexperimentresults。itprovesthatthemodelCallreflectthetempemt黼eeffectandstrainrateeffectofCarbonco