CASE II: CRANKSHAFT DESIGN
A crankshaft in an engine is used to convert reciprocating motion of a piston (in combustion chamber) to rotary motion for the transmission of power through shaft at the end of which a flywheel is connected to take up the fluctuations in speed due to varying pressure in different strokes. A crankshaft is subjected to shock loads (developed during explosion stroke) and to repeated torsional and bending stresses. Therefore, fatigue strength of the material of crankshaft is of utmost importance. To achieve maximum mechanical strength, the crankshafts of various engines, that is, aero engines, marine engines and auto engines are generally forged. Materials used in the manufacture of crankshafts are: (1) Fe 490, with ...
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