1. A torsion bar of length L consists of a round core of stiffness (GJ)c and a shell of stiffness (GJ)s . If a torque T is applied to this composite bar, what percentage of the total torque is carried...

1. A torsion bar of length
L
consists of a round core of stiffness
(GJ)c
and a shell of stiffness
(GJ)s
. If a torque
T
is applied to this composite bar, what percentage of the total torque is carried by the shell? 2. A rectangular aluminum bar 10 mm thick and 60 mm wide is welded to fixed supports at the ends, and the bar supports a load
W
= 4 kN, acting through a pin as shown. Find the reactions at the supports and the deflection of point
A.