Stress Analysis of Crankshaft Using Numerical Methods

In this chapter, an FEA was conducted on crankshafts from single-cylinder engines made of titanium alloy to determine the stress behavior. Cyclic loading condition plays an important role in determining the performance and life of an engine and here the crankshaft is subjected to several loading conditions. The main reason for comparison of stress distributions is to find materials which increase performance level and decrease weight and also increase fatigue life. Titanium alloy is among the material studied. Static Loading analyses were run through the FEA simulations and a detailed 3D Crankshaft model was modelled in SOLIDWORKS 2020 with optimized dimensions. In the case of loading conditions, this work focuses on key stress zones, including crankpin radius and crankpin fillet. The analysis of presented results indicated that position of titanium alloys on material ranking refers to lowest concentrations of equivalent stress up to 4.5% and biggest influence on substance’s weight. It is believed that these results would provide valuable suggestions for the choice of crankshaft material in single-cylinder engine and to optimize the dimension of significant areas. The experimental results indicate that the stress concentrations for the titanium alloys are lower and considerable mass savings. These observations provide useful suggestions when it comes to the choice of the crankshaft in single-cylinder engine operations.