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Abstract
A crankshaft is used to convert reciprocating motion of the piston into rotary motion. Crankshaft is one of the critical components of an IC engine. Failure of the crankshaft leads to a drastic disaster in IC engines. The load of cylinder gas pressure is transmitted to crankshaft through connecting rod. The dynamic load and rotating system exerts repeated bending and shear stress due to torsion, which are common stresses acting on crankshaft and mostly responsible for crankshaft fatigue failure. In this paper, static analysis of crankshaft for four stroke single cylinder petrol engine is carried out. Initially the crankshaft is designed and then 3D model of crankshaft was developed in CATIA. Based on analytical calculations, load acting on crankshaft is obtained. This model is then imported to ANSYS to perform static analysis to obtain the variation of stress magnitude at critical locations. Analysis is done by considering two materials and results are compared to select the best material.