Introduction to Aircraft Structural Analysis (Elsevier Aerospace Engineering)

9.7Tension Field Beams 319

Fig.9.19

Determination of flange forces.

Theflangeforcesarethen

Fc=

Sult

2 d

(dcotθ+ 2 s+b+cc−ct)

+

1

d

(

Mpt′−Mpc′ +Fwq−Mw−

∑

n

Wnzn

)

−

1

2

τmtw(dcotθ+b−cc−ct)

(9.64)

Ft=

Sult

2 d

(dcotθ+ 2 s+b+cc−ct)

+

1

d

(

Mpt′ −Mpc′ −Fwq−Mw−

∑

n

Wnzn

)

+

1

2

τmtw(dcotθ+b−cc−ct)

(9.65)

Evansetal.[Ref.14]adoptedaniterativeprocedureforsolvingEqs.(9.61)through(9.65)inwhichan
initialvalueofθwasassumedandσcfandσtfweretakentobezero.Then,ccandctwerecalculated,