飛機壁板戰(zhàn)傷修補方法的數(shù)值研究.pdf

1、西北工業(yè)大學碩士學位論文飛機壁板戰(zhàn)傷修補方法的數(shù)值研究姓名：舒茂盛申請學位級別：碩士專業(yè)：固體力學指導教師：王生楠20050301西北工業(yè)大學碩士學位論文AbstractAircraftstructuralbatledamagerepairtechniqueasoneoftheimportantcontentsofaircraftbattledamageassessmentandrepair(BDAR)techniquehasbeend

2、rawnwideattentionsbyindustrialandacademicworld.Especiallythebattledamagerepair(BDR)foraircraftpanelwhichactsasoneofthemaincomponentsofaircraftandsoispronetoexternaldamageisveryimportant.Atpresentthemoststudiesonthisaspec

3、tfocusonsingleplanarplatessuchasacrackedmetallicplateatpresentametallicorcompositeplatewithhole.GenerallyTheBDRforthesestructuresadoptsadhesivebondingpatchrepairandsomecomputationalmodelsareusedtosolvethisproblembyfinite

4、elementmethod(FEM)suchas“twinplatespring“modeloritsmodified巧peorthreedimensionalelementsdirectly.AlsotheBDRmethodsforstifenersofaircraftpanelhavegotlessattentiononliteraturesuptothepresent.Thispaperbasedontheexistingcomp

5、utationalmodelsandfiniteelementmethod(FEM)techniquepresentsamodelnamed“doubleshellspring“inwhichthecalculationofstifnesscoeficientsofspringelementissimplifiedandrigidelementisusedtoactsastheinterfaceconstraints.Basedonth

6、emodelandAPDLofANSYSsoftwaretherepairultimatestrengthofsingleplatewithvariousmaterialpropertiesisstudied.Furthermoretheinfluenceofadhesivelybondedlengthandpatchthicknessontherepairultimatestrengthofbondingpatchrepairedst

7、ifeneriscalculatedandanalyzed.Therepairultimatestrengthofstifenedpanelinwhichthebattledamageisassumedlocateonthestifenerisalsocalculatedandanalyzed.Someconclusionsvaluableinengineeringareobtainedinthepaperfromtheresults.