Abstract
The objective of the present work is to investigate the induced stress and deformation of a crank shaft. For this purpose, Variable Compression Ratio (VCR) engine is tested at 16.5 compression ratio. Peak pressures were recorded at various crank angles. A Matlab code is generated for dynamic analysis. For structural analysis and factor of safety, a three dimensional model crank shaft was developed using solid works. Finite element analysis of AISI E4340 Forged steel and Aluminum alloy 7076-T6 materials are carried by using analysis software ANSYS. The obtained results are equivalent Von-Mises stress, total deformation and factor of safety at different crank angles for the two materials are analyzed. It is concluded that Aluminum alloy exhibits better results than forged steel.
Highlights
The work output of the diesel engine depends on the torque conversion in combustion chamber
For structural analysis of the crank shaft the Solid model is converted into a FEA model and the results are obtained after applying the structural boundary conditions [25,26,27,28,29]
2) For the above crank angles, structural analysis was done using ANSYS and the results shows that the stresses and total deformation are more at crank pin than at bearing supports
Summary
The work output of the diesel engine depends on the torque conversion in combustion chamber. Several studies prove that, nitriding proves to be the best and the most effective method to increase fatigue resistance [6]. Literature on crankshaft failure and stress analysis reveals that, K Satyanarayana et al [9, 10] investigated the stress induced in the crank shaft AISI E4340 forged steel and determined the pin forces and bearing reactions with respective crank angles. Zoroufi and Fatemi [12] in their review article the effect of influential parameters like residual stress on fatigue behaviour and the methods of inducing compressive residual stress in crankshafts. In paper [13,14,15,16,17] an attempt was made to analyze the crank shaft with two alloys and their effect on the mechanical behaviour
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