Intension Analysis of 3-D Finite Element Analysis on 380 Diesel Crankshaft

Crankshaft is one of the most important parts in internal combustion engine. In this paper, a three-dimension model of 380 diesel engine crankshaft was created through Pro/ENGINEER software. The finite element analysis (FEM) software ANSYS was used to analyze the distortion and stress status of the crankshaft. First of all, the 380 diesel engine entity crankshaft model was created by Pro/ENGINEER software. Next, the model of crankshaft created by Pro/E software was imported to ANSYS software. Then, material properties, constraints boundary conditions and mechanical boundary conditions of the 380 diesel engine crankshaft were determined. Finally, the strain and stress figures of 380 diesel engine crankshaft were calculated, combined with maximum stress point and the dangerous area. Then this article checked the crankshaft's static strength and the fatigue evaluations which provide valuable theoretical foundation for the optimization and improvement of engine design.

I. Introduction

Crankshaft is one of the most important moving parts in internal combustion engine [1]. The strength of the crankshaft affects the reliability and life of internal combustion engine largely. Crankshaft bearing the gas pressure inside the cylinder, reciprocating and rotating inertia force of cyclical changes in the quality of the load which has been forced to crankshaft when engine working, at the same time torsional vibration, bending vibration and axial vibration have also been forced to crankshaft. So the bending stress and torsional stress in crankshaft will produce and lead to the bending deformation and torsional deformation. The stress concentration has been produced in the transition rounded corners of crankshaft. And now with the strength of engine enhancing, the working conditions of crankshaft become more and more harsh. The measures to ensure the crankshaft working reliability are essential.