Introduction to Aircraft Structural Analysis (Elsevier Aerospace Engineering)

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Problems 501

Fig. P.16.13 Fig. P.16.14

Plottheshearflowdistributionaroundthesection,withvaluesintermsofSanda.
Ans. q 1 =−0.52S/a,q 2 =q 8 =−0.47S/a,q 3 =q 7 =−0.17S/a,
q 4 =q 6 =0.13S/a,q 5 =0.18S/a
Parabolicdistributions,qpositiveclockwise.

P.16.15A box girder has the singly symmetrical trapezoidal cross section shown in Fig. P.16.15. It supports a
verticalshearloadof500kNappliedthroughitsshearcenterandinadirectionperpendiculartoitsparallelsides.
Calculatetheshearflowdistributionandthemaximumshearstressinthesection.


Ans. qOA=0.25sA
qAB=0.21sB−2.14× 10 −^4 s^2 B+ 250
qBC=−0.17sC+ 246
τmax=30.2N/mm^2.

Fig. P.16.15
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