47文献阅读报告

文献阅读报告ThePapersReadingReportPPTTemplates汇报人：张涛本周阅读文献ThePapersYouReadThisWeek本周阅读文献（一）英文文献[1]LeweiTong.Experimentalinvestigationonlongitudinalresidualstressesforcold-formedthick-walledsquarehollowsections[J].TongjiUniversity,2012.CONTENT论文背景及意义论文综述研究方法论题总结ThebackgroundandsignificanceThePaperreviewsTheresearchmethodsThesummaryCONTENT论文背景及意义论文综述研究方法论题总结ThebackgroundandsignificanceThePaperreviewsTheresearchmethodsThesummary选题背景及意义Thebackgroundandsignificance选题背景及意义Squarehollowsectionsareformedusingtwodifferentformingprocessesofa“directsquare”wayandan“indirectwayfromcirculartosquare”.Twotestmethodsofthehole-drillingmethodandtheX-raydiffractionmethodareusedtomeasurethemagnitudesanddistributionsoflongitudinalresidualstresses.Themagnitudesanddistributionsoflongitudinalresidualstressesalongthesectionperimeteraswellasalongthesectionthicknessareobtainedinthisstudy.Itisshownthatthelongitudinalresidualstressesareintensionatoutersurfaceandincompressionatinnersurface,andpresentnonlineardistributions,whichseemslike“sine”curvealongthesectionthickness.Furthermore,theeffectsofformingprocessandcross-sectiongeometryonthemagnitudesanddistributionsoflongitudinalresidualstressesforcoldformedthick-walledsquarehollowsectionsarediscussed.Atlast,twodistributionpatternshavebeenproposedforthesquarehollowsectionsformedusingtwodifferentformingprocesses,respectively.CONTENT论文背景及意义论文综述研究方法论题总结ThebackgroundandsignificanceThePaperreviewsTheresearchmethodsThesummary论文综述ThePaperreviewsTestprincipleHole-drillingmethod图一图二论文综述ThePaperreviews论文综述ThePaperreviews图三Nominalspecimendimensions论文综述ThePaperreviews图四图五论文综述ThePaperreviews表一论文综述ThePaperreviewsDeterminationofresidualstressdistributionalongthicknessThemeasuredvaluesofthestressesinsidethesectionneedtobecorrectedbytheamountwhichwasdeterminedusingelasticmethod.Namely,therealstressvalues(σ)equalsthemeasuredstressvaluesafterthetubeisstripped(σ′)plusthecorrectionamount(Δσ)。•thick-walledcircularhollowsections论文综述ThePaperreviews•thick-walledflatplatesTheequationsforthick-walledcircularhollowsectionsandthickwalledflatplatesshallbeusedforthecornerpartsandflatpartsofthesquarehollowsections,respectively.CONTENT论文背景及意义论文综述研究方法论题总结ThebackgroundandsignificanceThePaperreviewsTheresearchmethodsThesummary研究方法TheresearchmethodsExperimentalstudyTestspecimens研究方法TheresearchmethodsTestingusingthehole-drillingmethod研究方法Theresearchmethods(1)文献报告图\ResidualstresserforseriesofC-135×10usingthehole-drillingmethod(2)文献报告图\ResidualstresserforseriesofS-135×10usingthehole-drillingmethod(3)文献报告图\ResidualstresserforseriesofS-300×16usingthehole-drillingmethodTestresultsAsexpected,themagnitudesoflongitudinalresidualstressesattheweldsarehighestduetothestressconcentration,whichalmostreachthematerialyieldstrengths(fy)研究方法TheresearchmethodsTheeffectsofformingprocessForthecornerpart,itwasshownthatthemagnitudesanddistributionsoflongitudinalresidualstressesfortheseriesS-135×10werealmostthesameasthosefortheseriesC-135×10.However,fortheflatparts,itwasshownthatthemagnitudesoflongitudinalresidualstressesfortheseriesS-135×10weremuchsmallerthanthosefortheseriesC-135×10。文献报告图\Comparisonofresidualstressesbetweendifferentformingprocesses研究方法TheresearchmethodsProposedresidualstressmodelsForthecold-formedthick-walledsquarehollowsectionsformedusingthe“directway”,thelongitudinalresidualstressesforflatpartsofthesectioncanbecalculated研究方法TheresearchmethodsThelongitudinalresidualstressesforcornerpartsofthesectioncanbecalculated。研究方法TheresearchmethodsForthecold-formedthick-walledsquarehollowsectionsformedusingthe“indirectway”,thelongitudinalresidualstressesforflatpartsofthesectioncanbecalculated。研究方法TheresearchmethodsThelongitudinalresidualstressesforcornerpartsofthesectioncanbecalculated：CONTENT论文背景及意义论文综述研究方法论题总结ThebackgroundandsignificanceThePaperreviewsTheresearchmethodsThesummary论题结论ThesummaryThemagnitudesanddistributionsoflongitudinalresidualstressforcold-formedthick-walledsquarehollowsectionscalculatedusingproposedequationshavealsobeenshownbelow:论题结论Thesummary论题结论ThesummaryconclusionThelongitudinalresidualstressesareintensionatoutersurfaceandincompressionatinnersurface,andpresentnonlineardistributionsalongthesectionthickness.Longitudinalresidualstressesaresmallatthemiddle-surfacealongthethicknessofthesection.Itisalsoshownthatthemagnitudesofthelongitudinalresidualstressesatthecornerpartsarelargerthanthoseatflatparts.theformingprocesshaslittleinfluencesforthecornerparts,themagnitudesanddistributionsoflongitudinalresidualstressesfortheseriesS-135×10(formedusingthe“directway”)werealmostthesameasthosefortheseriesC-135×10(formedusingthe“indirectway”).However,thisisnotthecasefortheflatparts,themagnitudesoflongitudinalresidualstressesfortheseriesS-135×10weremuchsmallerthanthosefortheseriesC-135×10.