The shown circular bar is fixed to the left wall. It has a diameter of 0.5 in and length of 60 in at 50 °F when it is unloaded. There is a gap of 0.08 inches between the bar end and the right opposite wall. The bar was simultaneously loaded axially with a load P and heated such that the temperature was raised from 50 °F to 130 °F along all the bars. The bar material has a modulus of elasticity = 15 x 106 psi and coefficient of thermal expansion = 10.6x106 1/°F. Determine the maximum magnitude of the load P such that the right opposite wall remains stress free. P

Determine the compressive force (in lb) in the bars shown after a temperature rise of 173°F if d = 0.015 in. Round off the final answer to five decimal places. Use the following data: Bronze              Aluminum A = 2.24 sq. in          A = 2.78 sq. in  E = 14959726 psi            E = 10594540 psi L = 12.5 in            L = 16.6 in α = 11.61 x 10-6/ °F      α = 12.67 x 10-6/°F

The following structure has a compression allowable stress of 50 MPa. In the laboratory, it was found that the allowable stress in tension is 5 MPa.