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Structural Mechanics Problems: Trusses & Composite Bars

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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 800π‘šπ‘š2for AB and 400π‘šπ‘š2for AC. Determine the safe
value of W if the working stress are 110π‘€π‘ƒπ‘Žfor AB and
1 2 0 𝑀 for
𝑃 π‘Ž 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).
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