Problem # p045

Shear stress in cross-section of a beam

Given is a shear-force V = 3000 N acting vertically downward on the beam cross-section as shown. Determine :
  1. the central moment of inertia
  2. the shear-stress at top and bottom of beam, y=±a/2
  3. make a rough sketch of Q(y)/b(y) as function of y. What happens at y=± t/2 ?
  4. the shear stress in the neutral surface ( y=0 )
  5. the location of the max shear stress ( it is NOT in the NS=neutral surface )
  6. the maximum shear-stress

a = 6 cm   t = 1 cm