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Crankshaft is a key element of in an engine assembly. Crankshaft consists of two web sections and one crankpin. Crankshaft converts the reciprocating displacement of the piston to a rotary motion with a four link mechanism. This paper is related to design and finite element analysis of crankshaft of 4 cylinder diesel engine of heavy vehicle like truck. Engine capacity is 3785.1cc. The finite element analysis in ANSYS software by using three materials based on their composition viz. FG260, FG300 and Aluminum based composite material. The parameter like von misses stress, deformation; maximum and minimum principal stress & strain were obtained from analysis software. The results of Finite element shows that the Aluminum based composite material is best material among all.