Compute F2 and σ2  
scene 10 of 12
The figure shows the front view and the cross section view of a brass link which is labeled 1. A steel rod labeled 2 is shown below. The inside length of the brass link is 250 millimeters. The width and the thickness of the brass link are 20 millimeters and 10 millimeters respectively. A 30 millimeters diameter steel rod is shown below. The length of the steel rod is 0.2 millimeters longer than the inside length of the brass link.

From the equilibrium equation, the force in steel rod (2) is:

The normal stress in the steel rod can now be computed:

Numeric values
Temperature change

ΔT = +20°C

Brass link (1)

L1 = 250 mm
A1 = 400 mm2
E1 = 105 GPa
α1 = 20.9 × 10-6/°C

Steel rod (2)

L2 = 250 mm
A2 = 706.86 mm2
E2 = 200 GPa
α2 = 11.7 × 10-6/°C