金屬蒙皮連接抗剪性能的分析研究.pdf

1、Y1039831分類號(hào)：丑』三絲密級(jí)：——UDc：24學(xué)號(hào)：Q3Q25⑨東南大學(xué)碩士掌位論文金屬蒙皮連接抗剪性能的分析研究研究生姓名：隆娟蝗導(dǎo)師姓名：趕戇壬熬授申請(qǐng)學(xué)位級(jí)別亟學(xué)科專業(yè)名稱結(jié)掏王擺論文提交日期星鯉壁壘璺且墨旦論文答辯日期gQQ曼生墨目至曼旦學(xué)位授予單位塞畝盍堂學(xué)位授予日期星鯉量生縣旦答辯委員會(huì)主席蠱塞評(píng)閱人2006年05月日摘要SHEARBEHAVIoRoFCoNNECTIoNSINMETALSⅪNDIAPHRAGMGra

2、duate：ChenJuantingSupervisor：ProfShuCanpingSoutheastUniversityABSTRACTWiththedevelopmentofsteelstructuresmetalskindiaphragmstructurehasbeenwidelyusedincivilengineeringAndthestructurestylesarcbecomingmoreandmorediverseThe

3、metalsheetingisconnectedwiththemainstructurebyconnections。TheinplanestifinessofmetalsheetingtakestheeffecfofskindiaphragmintoeffectsFurthermoretheinplanestressstateofmetalskindiaphragminducethattheconnectionsmainlybearth

4、esbear10adThenbasedonconclusionofachievementsofformerresearchersthedissertationmainlystudiedtheshearbehaviorofconnectionsinmetaiskindiaphragmBecauseofthevarietyofconnectionsinskindiaphragmthedissertation，throughcarefuIco

5、mparisonandselection，finallychoosestwotypesofconnection，selftappingscrewconnectionandresistancespotweldconnection，asstudyoNectsforfiniteelementmethodanalyzingThemaiorworkcontainsthefollowing：1Setup3Dsolidmodelstosimulate

6、theconnectionsForselftappingscrewconnection，materialnonlinearandcontactnonlineareffectsareincludedintheanalysisForresistancespotweldconnection，residualstressiscalculatedfirst；thenthefiniteelementanalysisincludingmaterial

7、nonlinearityandcontactnonlinearityiscarriedout2Oblainthefailuremodesofbothtypesofconnectionsbyanalyzinga】a坦enumberofexamplesForselftappingscrewconnection，therearethreefailuremodes：④Theholeinthethinnerplateiselongatedandt

8、heslippagebetweenthetwoplatesismoreseriousroftenfoundinconnectionbetweenathinandathickplate)④Thescrewiswrythesideofplateistilting，andtheedgeofholeissquished(oftenfoundinconnectionbetweentwothinplates)⑧Thescrewbecomesobvi

9、ouslyleanthesideofplatebecomestiltingandthescrewjspulledoutbecauseofthebrokenscrewthread(oftenfoundjoconnectionbetweentwothickplates)Forresistancespotweldconnection，therearealsothreefailuremodes(i3Thethinnerplateistorewi

10、thoutobviousdisplacementordeformationinthemodel(oftenfoundinconnectionbetweenathinplateandathickone)②ThesteelplatefailsbecauseofbendingTheedgeofthenuggetfailsbecauseoftensionandshearingAndthedeformationofthemodelisextrem

11、elysevere(oftenfoundinconnectionbetweentwothinplates)(墨)Thenuggetfailsbecauseofshearingwithcrimpleofthebackedgeandobviousdisplacement陽(yáng)ftenfoundioconnectionbetweentwothickplates)3Accordingtotwotypesofconnections，loaddefle

12、ctioncur∞s(P—Acurves)withdifferentthicknessplatesanddifferentdiametersnuggetsarcobtainedrespectivelyAndthecurvesshowthatmostmodelspresentductilefailure，andtheconnectionstrengthandstiffiaessincreasewiththethicknessofthepl

13、atesandthediameteroftheconnection4Accordingtotheregularityoftheconnectionstrengthandstifinesscurvesusing1eastsquaremethodandbasedontheoriginalempiricalfommlas，thisdissertationproposesformulasforcalculatingconnectionstren

14、gthandsti確CSS，Theformulashaveaguaranteeratiou口to95percentandthascanbedirectlyusedinpracticalengineerdesignFurthermore，theseformulashaveuniformfotreatsdespiteofthicknessdifiercocesinconnection，whichstronglyembodiesrationa

15、lityandcontinuityInthisdissertationthereare5formulasforselftappingscrewconnectionandresistancespotweldconnectionComparedwithforeignempiricalones，formulasfromthedissertationgainfiniteelementresultsthataremuchclosertothete

16、stdataAnditcanaiseflectsomeregularitythattheyareHaabletoKeywords：metalskindiaphragm，shearbehaviorselftappingscrewconnection，contactanalysis，resistancespotweldconnection，residualstress，connectionstiffness，connectionstreng