Fatigue Life Estimation of Forged Steel and Ductile Iron Crankshaft of Single Cylinder Engine Using Fatigue assessment Techniques
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Abstract
Crankshaft is one of the critical components of an IC engine, failure of which may result in disaster and makes engine useless unless costly repair performed. It possesses intricate geometry and while operation experiences complex loading pattern. In IC engines, the transient load of cylinder gas pressure is transmitted to crankshaft through connecting rod, which is dynamic in nature with respect to magnitude and direction. However, the piston along with connecting rod and crankshaft illustrate respective reciprocating and rotating system of components. 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. Hence, fatigue strength and life assessment plays an important role in crankshaft development considering its safety and reliable operation. The present paper is based on comparative studies of two crankshafts of fatigue life assessment of a single cylinder diesel engine crankshaft by using High cycle fatigue (HCF) technique
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References
Williams, J., Montazersadgh, F.H., and Fatemi, A., 2007, “Fatigue Performance Comparison and Life Prediction of Forged Steel and Ductile Cast Iron Crankshafts
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Montazersadgh, F.H., 2007, “Stress Analysis and Optimization of Crankshafts Subjected to Dynamic Loading,” Masters Thesis, The University of Toledo, Toledo, OH, USA.
Park, H., Ko, Y. S., and Jung, S. C., 2001, “Fatigue Life Analysis of Crankshaft at Various Surface Treatments,” SAE Technical Paper No. 2001-01- 3374, Society of Automotive Engineers, Warrendale, PA, USA.
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