P3

An idealized cross section of a thin walled beam has thicknesses: t = 0.005m, t2 = 0.007m, t3 = 0.006m. Its

shear modulus is G = 2.0GPa. It is loaded with a torque T = 3kN-m. T

Obtain:

a) shear flows: 91, 92 and 93,

b) shear stresses in all five walls,

c) angle of twist per unit length,

d) torsional rigidity per unit of rotation.