Answer to Question #302414 in Civil and Environmental Engineering for Chacks

Question

A continuous cable (diameter 6 mm) with tension force T is attached to a horizontal frame member

at B and C to support a sign structure, Fig. 1. The cable passes over a small pulley at D. The wire

is made of a copper alloy, and the stress-strain relationship for the wire is

(a) Find the axial normal strain in the cable and its elongation due to the load W = 6.8 kN

(b) If the forces are removed, what is the permanent set of the cable.

Hint: Start with constructing the stress-strain diagram and determine the modulus of elasticity, E

and the 0.2% offset yield stress.

Answer 1

Answer is given below