Introduction to Aircraft Structural Analysis (Elsevier Aerospace Engineering)

532 CHAPTER 18 Combined Open and Closed Section Beams sothat q 03 =−1.04s 3 (v) andq 3 =−104N/mminthewall03.Itfollowsthatforequi ...

18.3 Torsion 533 18.3 Torsion................................................................................................ Ge ...

534 CHAPTER 18 Combined Open and Closed Section Beams Thetorsionalrigidityofthecompletesectionisthen GJ= 5000 × 107 + 6 × 107 = ...

Problems 535 Fig. P.18.2 P.18.3 IfthewingboxofP.18.2issubjectedtoatorqueof100kNm,calculatetherateoftwistofthesectionand themaxim ...

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CHAPTER 19 Structural Idealization.................................................................. Sofarwehavebeenconcernedwit ...

538 CHAPTER 19 Structural Idealization Fig.19.2 Idealization of a wing section. dueto,say,bendingofthewingwouldbesmall.Furthermo ...

19.2 Idealization of a Panel 539 Fig.19.3 Idealization of a panel. Similarly, B 2 = tDb 6 ( 2 + σ 1 σ 2 ) (19.2) InEqs.(19.1)and ...

540 CHAPTER 19 Structural Idealization TheidealizedsectionisshowninFig.19.4(b),inwhich,fromsymmetry,B 1 =B 6 ,B 2 =B 5 ,B 3 =B 4 ...

19.3 Effect of Idealization on the Analysis 541 19.3 EffectofIdealizationontheAnalysisofOpenandClosedSectionBeams............... ...

542 CHAPTER 19 Structural Idealization Fig.19.5 Idealized fuselage section of Example 19.2. The origin of axes Cxycoincides with ...

19.3 Effect of Idealization on the Analysis 543 Table 19.1 ① ② ③ ④ ⑤ Boom y(mm) B(mm^2 ) Ixx=By^2 (mm^4 ) σz(N/mm^2 ) 1 + 660 6 ...

544 CHAPTER 19 Structural Idealization Theseshearloadsproducedirectstressesduetobendingintheboomsandskinandshearstressesin thesk ...

19.3 Effect of Idealization on the Analysis 545 Fig.19.7 Idealized channel section of Example 19.3. Theeffectivedirectstress-car ...

546 CHAPTER 19 Structural Idealization Similarly, q 34 =− 12 − 10 −^4 × 300 ×(− 200 )=−6N/mm while,finally,attheoutsideofboom4,t ...

19.3 Effect of Idealization on the Analysis 547 Fig.19.9 Curved web with constant shear flow. or Sx=q 12 ∫^2 1 cosφds which,from ...

548 CHAPTER 19 Structural Idealization Therefore,theresultantshearforceactingonthewebistheproductoftheshearflowandthelengthof th ...

19.3 Effect of Idealization on the Analysis 549 19.3.3 Shear Loading of Closed Section Beams Argumentsidenticaltothoseintheshear ...

550 CHAPTER 19 Structural Idealization Eq.(19.11)reducesto qs=− Sy Ixx ∑n r= 1 Bryr+qs,0 (i) inwhich Ixx= 2 ( 200 × 302 + 250 × ...

19.3 Effect of Idealization on the Analysis 551 Fig.19.12 Shear flow distribution N/mm in walls of the beam section of Example 1 ...