Find the maximum transverse shear stress in the thin walled box beam shown in the figure below. This beam is subjected to a shear force V= 10 kip and maximum transverse shear will be at the neutral axis.

A beam has a bending moment of 3.5 kN-m applied to a section with a hollow circular cross-section of external diameter 3.6 cm and internal diameter 2.4 cm . The modulus of elasticity for the material is 210 x 109 N/m2. Calculate the radius of curvature and maximum bending stress. Also, calculate the stress at the point at 0.5 cm from the neutral axis (i) The moment of inertia =  ii) The radius of curvature is  (iii) The maximum bending stress is iv) The bending stress at the point 0.5 cm from the neutral axis  is

A simply supported composite beam 3 m long carries a uniformly distributed load of intensity q 3.0 kN/m (see figure). The beam is constructed of a wood member, 100 mm wide by 150 mm deep, reinforced on its lower side by a steel plate 8 mm thick and 100 mm wide. (a) Find the maximum bending stresses sw and ss in the wood and steel, respectively, due to the uniform load if the moduli of elasticity are Ew 10 GPa for the wood and Es 210 GPa for the steel. (b) Find the required thickness of the steel plate so that the steel plate and wood reach their allowable stress values, sas 100 MPa and saw 8.5 MPa, simultaneously under the maximum moment.

A 8 B 0 2 3 Calculate the shear force in kN at x=2,5 m in the beam in the figure. Note: The absolute magnitude of the force must be taken into account. C D E 0,25 2,75 3,25 4 kN/m 4 3 kN/m 4 KN 5 6 z (m)