Question

1) what related topics in mechanics of material you see in these two figures

The Left Foot Figure 1: Human feet cross section Figure 2: Old Airplane window failure dictate the size of a join f 2.You are asked ra steel bridge (Figure below) built in Hartford, CT which has span length of 400 ft. How much expansion joint do you suggest? (You may find some required information by searching the web). Attach your solution here. (5 points) 3. Make comments at least on 1 other posts by your classmates. (5 points)

Answer 1

Related topics-

• Thermal stress and thermal expansion- shown images show train tracks, surface of earth, window area of airplane with cracks running through them. These cracks are generally and most likely produced by temperature change that occur due to seasonal conditions and altitude variations. This change in temperature causes thermal stress beyond material can resist so it fails generating cracks as shown.
• fatigue failure- fatigue caused by fluctuating load also produces this kind of failure.
• creep failure- combination of stress and temperature change also produce these failure.