Introduction to Aircraft Structural Analysis (Elsevier Aerospace Engineering)

Problems 575

Fig. P.20.1

P.20.2 IfthewebinthewingsparofP.20.1hasathicknessof2mmandisfullyeffectiveinresistingdirectstresses,
calculatethemaximumvalueofshearflowinthewebatasection1mfromthefreeendofthebeam.

Ans. 46.8N/mm.

P.20.3 CalculatetheshearflowdistributionandthestringerandflangeloadsinthebeamshowninFig.P.20.3at
asection1.5mfromthebuilt-inend.Assumethattheskinandwebpanelsareeffectiveinresistingshearstress
only;thebeamtaperssymmetricallyinaverticaldirectionaboutitslongitudinalaxis.

Ans. q 13 =q 42 =36.9N/mm,q 35 =q 64 =7.3N/mm,q 21 =96.2N/mm,

q 65 =22.3N/mm.

P 2 =−P 1 =133.3kN,P 4 =P 6 =−P 3 =−P 5 =66.7kN.

Fig. P.20.3