Abstract
Crankshaft is one of the crucial parts for the internal combustion engine which required effective and precise working. In this study, the aim of the study is to identify the stress state in the crankshaft and to explain the failure in automotive crankshaft and fatigue life of crankshaft by using finite element analysis. The 3D solid modelling of the crankshaft model was designed and developed using SolidWorks. A static structural and dynamic analysis on an L-twin cylinder crankshaft were used to determine the maximum equivalent stress and total deformation at critical locations of the crankshaft. The model was tested under dynamic loading conditions to determine fatigue life, safety factor, equivalent alternating stress and damage using the fatigue tool. The results obtained from this study indicated that the crankshaft has obvious fatigue crack which was belongs to fatigue fracture. The fatigue fracture developed was only attributed to the propagating and initiate cracks on the edges of the lubrication hole under cyclic bending and torsion. Overall, the crankshaft is safe for both static and fatigue loadings. In dynamic analysis, the critical frequency obtained in the frequency response curve should be avoided which it may cause failure of the crankshaft.
Highlights
Throughout many decades, internal combustion engine (ICE) has played a crucial role in our daily life
The results reported from this analysis stated that the failure began at the fillet region on the lubrication hole and this was caused by the high bending stress concentration
The high stress concentration zone was the focus of this study as its location of failure, the crankpin and the corners were evaluated as the high stress concentration and fatigue failure zone in this study
Summary
Throughout many decades, internal combustion engine (ICE) has played a crucial role in our daily life. Research has been actively carried out to learn about the improved model for the generation. This contributes to the maximization power of ICE and minimization of fuel consumption of the automobile vehicle and air pollution to the environment, such as greenhouse effect [1]. The crankshaft is an essential mechanical part in ICE because it transforms the linear movement of the pistons into rational movement in the shaft. The engine may be unavailable to use if the crankshaft is not working fine.
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