A class 8.8, M273 ISO bolt has rolled threads and is used to clamp two rigid members together so that ke = 6 kb. There is an external force fluctuating rapidly between 0 and 20 KN. The construction and precision of manufacture are such that there is a possibility of slight bolt bending. Bolt material exhibits an idealized elastic, perfectly-plastic stress-strain curve. Answer the following two questions for the initial tension of regular value that a mechanic would apply using a torque wrench, i.e. F (N) = 2800 d(mm) a) Make a force-versus-time plot showing the fluctuating external load, bolt force and clamping force. b) Analyze bolt failure. Consider both separation and eventual fatigue failure. Provide safety factors when applicable.