摘要：compare the fatigue performance of two competing manufacturing technologies for automotive crankshafts, namely forged steel and ductile cast iron. In this study a static simulation was conducted on two crankshafts, cast iron and forged steel, from similar single cylinder four stroke en-gines.Finite element analyses was performed to obtain the variation of stress magnitude at critical locations. The dynamic analysis was done analytically and was verified by simulations in ANSYS. Results achived from aforementioned analysis were used in optimization of the forged steel crankshaft.Geometry,material and manufacturing processes were optimized considering different constraints, manufacturing feasibility and cost.The optimization process included geometry changes compatible with the current engine,fillet rolling and result in in-creased fatigue strength and reduced cost of the crankshaft, without changing connecting rod and engine block.
