1. ENGR 220 Section 4.6

2. Thermal Stress

3. Pillow Block Bearings

4. Expansion Loop in Steam Piping

5. Expansion Joints

6. High Speed Aircraft The only aircraft that grows more in length than the SR- 71 due to aerodynamic heating is the Concorde (aluminum structure, coefficient of thermal expansion is 22 x 10^-6), which at the end of it's Mach 2.0 heat cycle, is about 18 inches longer than when it took-off.

7. “Sun Kinks” in Railroad Tracks

8. The A-36 steel bar is constrained to fit between two fixed supports when T 1 = 60ºF. If the temperature is raised to T 2 =120ºF determine the average thermal stress developed in the bar.

9. Lecture Example: The 40-ft long A-36 steel rails on a train tack are laid with a small gap to allow for thermal expansion. Determine the gap required so that the rails touch one another when the temperature is increased from -20°F to 90°F. What would the force on the rails be if the temperature were to rise to 110°F. The cross-sectional area of each rail is 5.1 in 2.

10. Determine the force exerted on the walls when temperature increases from 10  C to 20  C