Page 74 - 2024年第55卷第4期
P. 74

mer,2012,53(17):3655 - 3658.
                [15] BAIY,LIUC,HUANGG,etal.Ahyper - viscoelasticconstitutivemodelforpolyureaunderuniaxialcompressive
                       loading[J].Polymers(Basel),2016,8(4):133.
                [16] GONGC,CHENY,LIT,etal.Freevolumebasednonlinearviscoelasticmodelforpolyureaoverawiderangeof
                       strainratesandtemperatures [J].MechanicsofMaterials,2021,152:103650.
                [17] CHEND,WUH,WEIJ,etal.Nonlinearvisco - hyperelastictensileconstitutivemodelofspraypolyureawithin
                       widestrain - raterange[J].InternationalJournalofImpactEngineering,2022,163:104184.
                [18] JOHNSONA,QUIGLEYC,FREESEC.Aviscohyperelasticfiniteelementmodelforrubber[J].ComputerMeth
                       odsinAppliedMechanicsandEngineering ,1995,127(1?4):163 - 180.
                [19] BINGQIL,ZHENYUZ,BINL,etal.Studyondebondingfailuremodelofpolyurea - basedcoatingwithhighve
                       locitywaterflowbasedoncohesivezonemodel [J].ChineseJournalofTheoreticalandAppliedMechanics,2020,
                      52(5):1538.
                [20] LIB,ZHANGZ,WANGX,etal.Investigationonthedebondingfailuremodelofanchoredpolyureacoatingun
                       derahigh - velocitywaterflowanditsapplication [J].Sustainability,2019,11(5):1261.
                [21] 马铢,石长征,伍鹤皋.考虑黏结 滑 移 的 钢 衬 钢 筋 混 凝 土 管 道 承 载 特 性 分 析 [J].水 利 学 报,2022,53
                       (2):220 - 229.
                [22] 吴洋锋,汪洋,贾金生,等.高混凝土坝考虑水表面张力影响的水力劈裂研究[J].水利学报,2022,53
                       (12):1500 - 1511.



                           Nonlinearanalysisanddesignofsurfaceanti - seepagepolyureacoating
                                             consideringmultipleactioneffects


                                     LIBingqi,ZHANGJilei,LIUXiaonan,MENGTianyi
                                  (StateKeyLaboratoryofSimulationandRegulationofWaterCycleinRiverBasin,
                                 ChinaInstituteofWaterResourcesandHydropowerResearch,Beijing 100038,China)


                  Abstract:Thepolyureaanti - seepagecoatingsystem hasbeenextensivelyusedinhydraulicstructuresduetoits
                  superiorlong - term durabilityandmechanicalproperties,andfinerobustnesstoconstructionsurfacesincontrast
                  withpolyurethanecoating.Inviewofthelackofstructuraldesigntheoryforpolyureacoatingsystem,theexperi
                  ence - baseddesignmethodcommonlyusedmayleadtounsafe ,unreasonableanduneconomicresults.Inthisstudy,
                  thekeytheoryconcerningthenonlinearanalysisofsurfaceanti - seepagepolyureacoatingwasdiscussed,anda
                  nonlinearFEM modelswasbuilttoinvestigatethemechanicalbehavior,peelingbehavior,andfailuremodeofthe
                  polyureacoatingundervariousconditions,suchassubstratesurfacefracturing,surfacehydraulicpressure,and
                  jointdeformation.Themainconclusionsareasfollows :(i)Concerningthecombinedsubstratesurfacefractureand
                  hydraulicpressurecondition ,thepeeledcoatingatthecracklocationexhibitsatensile - bendingstressstate.(ii)
                  Coatingmaterialdamagemayoccuratthestressconcentrationpoint.(iii)Themaximum stressincreaseswiththe
                  increaseofthehydraulicpressureandcohesivestrength,andthepeelinglengthofthecoatingdecreaseswiththe
                  increaseofcohesivestrengthandincreaseswiththeincreaseoffracturewidth.(iv)Concerningthejointdeformation
                  condition ,thepeelinglengthincreaseswiththecoatingthicknessandjointdeformationwidth,andthepeeling
                  lengthdecreaseswiththecohesivestrength.(v)Themaximumstressincreaseswiththecoatingthickness,cohesive
                  strengthandthehydraulicpressure.Finally,theframeofdesignandsimpledesignprogramwereproposed.
                  Keywords:polyureacoating;surfacefracturing;jointdeformation;numericalsimulation;coatingstructuraldesign

                                                                                    (责任编辑:韩 昆)









                —  4 4  —
                     8
   69   70   71   72   73   74   75   76   77   78   79