Consider a wing box beam with $9$ stringers and loaded as described in the figure below. Determine the shear flow under the given loading and the shear center for this cross section.

where:

$t_1=0\mathrm{.}1cm$

$t_2=0\mathrm{.}2cm$

$A_1=A_2=1c{m}^2,A_4=A_5=3c{m}^2$

$A_3=A_6=2c{m}^2$

$A_7=A_8=A_9=1c{m}^2$