The loading diagram at the right with dimension d 6 If the

The loading diagram at the right with dimension d = 6”. If the total applied force F = 5.52 kips, what is the maximum moment in the beam in (lb-in). From strength of materials, what is the maximum tensile bending stress (psi)? (Note, this stress is the modulus of rupture).

Solution

Max moment = F/2 * d = 5.52/2 *6 = 16.56 lb-in

Max tensile bending stress = 6 M/d^3 = 6 X 16.56/ 6^3 = 0.46 psi.