A rigid bar is pinned at the top and attached to opposing walls by two
10 cm
long steel wires, A and B, with
E=
200 GPa
,
A =
0.2 cm^{2}
,
and
"{\\alpha}"=
"11.7\\times10^{-6} /^{\\circ}C"
.
Initially, the forces in both wires are zero. What are the stresses in wire A and wire B in this state?
Stress in wire A:
Stress in wire B:
Then, the temperature of rod A decreased by
"50 ^{\\circ}C"
. What are the stresses in wire A and wire B following this temperature change?
Stress in wire A:
Stress in wire B:
