Illustrative Problem:
A two-member truss supports a block of weight W as shown
in the figure. The cross-sectional areas for the members
are 800𝑚𝑚2for AB and 400𝑚𝑚2for AC. Determine the safe
value of W if the working stress are 110𝑀𝑃𝑎for AB and
1 2 0 𝑀 for
𝑃 𝑎 AC.
Illustrative Problem:
A composite bar consists of aluminum section rigidly
fastened between a bronze section and a steel section as
shown in the figure. Axial loads are applied at the
positions indicated. Determine the stresses in each
section
and indicate whether tension (T) or compression
(C).