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| An estimation of failure stress condition in rocker arm shaft through FEA and microscopic fractography Dong Woo Lee
The Journal of Mechanical Science and Technology, vol. 22, no. 11, pp.2056-2061, 2008
Abstract : The failure analysis of a rocker arm shaft for a 4-cylinder SOHC engine is presented. Fracture accidents occur in the
interface between the rocker arm shaft and the engine block. These fractures are responsible for bolt tightening. The
failure boundary condition is estimated by using an orthogonal array and ANOVA. Stress range is obtained by fatigue
striation spacing and fracture mechanical simplification. Minimum and maximum stresses are predicted by FEA for the
failure boundary condition. This study shows that the stress conditions for a fracture surface with fatigue striation can
be determined by FEA and SEM.
Keyword :
Orthogonal array; ANOVA; Fractography; Fatigue striation; SEM; FEA; Stress intensity factor
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