DESIGN AND OPTIMIZATION OF CRANKSHAFT FOR SINGLE CYLINDER 4 – STROKE SPARK IGNITION ENGINE USING COUPLED STEADY-STATE THERMAL STRUCTURAL ANALYSIS

The aim of the study is to design and optimization of crankshaft for a single cylinder four stroke over head valve (OHV) spark ignition engine. This paper used reverse engineering techniques, in order to obtain of an existing physical model. A three-dimensional crankshaft has been created with the help of SOLIDWORKS and, it is imported to ANSYS environment for the coupled steady-state thermal structural analysis. The material used for crankshaft is AISI 1040, AISI 1045, AISI 4140 and AISI 4615. The objective of this paper focuses the light weight crankshaft design through coupled steady-state thermal structural analysis, and to optimize the crankshaft design within the design domain using parametric optimization. The results obtained from finite element analysis and parametric optimization concluded, the modified design is safe along the selected materials for AISI 1045 and shows the maximum von-mises stresses 184.21 MPa, factor of safety (n) is 2.4428 and it is reduced weight of the crankshaft was 63 grams which is 4.04 % less as compared to existing crankshaft model without compromising the strength to weight ratio.