Introduction to Aircraft Structural Analysis (Elsevier Aerospace Engineering)
312 CHAPTER 9 Thin Plates Theratioτ/τCRisknownastheloadingratioorbucklingstressratio.ThebucklingstressτCRmaybe calculatedfromthe ...
9.7Tension Field Beams 313 Fig.9.13 Calculation of stiffener buckling load. Fig.9.14 Effect of taper on diagonal tension field b ...
314 CHAPTER 9 Thin Plates Also,theshearforceSatanysectionofthebeamis,fromFig.9.14, S=W−(FT+FB)sinβ or,substitutingforFTandFBfrom ...
9.7Tension Field Beams 315 stressesmaybefoundapproximatelyfrom ( σmb σcrb ) 2 + ( τm τcr ) 2 = 1 (9.46) whereσcrbis the critical ...
316 CHAPTER 9 Thin Plates Further,thedirectstressσηontheplaneFD(Fig.9.16(c))whichisperpendiculartotheplaneofthe buckleisfoundfro ...
9.7Tension Field Beams 317 Fig.9.17 Determination of plastic hinge position. Then, Sxccφ= 2 Mpc′φ+σtctwsin^2 θ c^2 c 2 φ Themini ...
318 CHAPTER 9 Thin Plates Fig.9.18 Determination of flange stress. fromwhich σcf= Fc−^12 (σtcsinθcosθ+τm)twcc Acf (9.59) whereFc ...
9.7Tension Field Beams 319 Fig.9.19 Determination of flange forces. Theflangeforcesarethen Fc= Sult 2 d (dcotθ+ 2 s+b+cc−ct) + 1 ...
320 CHAPTER 9 Thin Plates andapproximatevaluesofFcandFtarefound,givingbetterestimatesforσcfandσtf.Theprocedure wasthenrepeatedun ...
Problems 321 Fig. P.9.1 Fig. P.9.2 method,findanapproximateexpressionforthemagnitudeofthestressσwhichcausestheplatetobuckle,assu ...
322 CHAPTER 9 Thin Plates Ans. 613.8N/mm,844.7N/mm. Fig. P.9.4 P.9.5 Asimplysupportedbeamhasaspanof2.4mandcarriesacentralconcent ...
Problems 323 iflocalinstability,skinbuckling,andpanelstrutinstabilityalloccuratthesamestress.NotethatinFig.P.9.7(a), onlytwoofse ...
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PART B Analysis of Aircraft Structures ...
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CHAPTER 10 Materials With this chapter, we begin the purely aeronautical part of the book, where we consider structures peculiar ...
328 CHAPTER 10 Materials propertyofthesealloysistheirretentionofstrengthathightemperatures,whichmakesthemparticularly suitable f ...
10.2 Steel 329 magnesium,0.6%manganese,withtheremainderaluminumandappearstobeasatisfactorycompromise betweenthevariousimportant, ...
330 CHAPTER 10 Materials components. To overcome some of these difficulties, types of steel known asmaragingsteels were develope ...
10.6 Composite Materials 331 Newfabricationprocesses(e.g.,superplasticformingcombinedwithdiffusionbonding)enablelarge andcomplex ...
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