The I-beam of Figure 3 in an aircraft is loaded with a vertical shear force Sy = 2300 N and a horizontal shear force Sx = 800 N through the shear centre at the end of the beam. (a) Determine the expression for the shear flow distribution and then sketch it: and (b) by using this, go on to find the position of the shear centre.

2300 N Scx Shear centre Scy 2500 mm Tip 800 N Root All dimensions in mm 3.75 Cross sectional view at 750 mm from free end 3.75 40 Fig. 3 1.25 1.25 40 20 20 150