Stress Analysis and Shape Optimization of Connecting Rod using Different
Journal Title: REST Journal on Emerging trends in Modelling and Manufacturing - Year 2015, Vol 1, Issue 2
Abstract
In a reciprocating engine, the connecting rod is one of the most critical components that are bear static and dynamic fluctuation of various loads. Every vehicle that uses an IC engine requires, at least one connecting rod depending upon the number of cylinders in the engine. It endures various complex loads of periodic change: power thrust from piston pin, the inertia force produced by swing the connecting rod and high compression load due to compression of fuel, whereas bending stress caused by the thrust and on the piston and by centrifugal effects. The connecting rod is generally made of forged steel due to its good mechanical properties like compression, tension, toughness and fatigue. The main objective of the present work was to improve the strength to weight ratio and its optimization by weight reduction in connecting rod and to perform stress analysis at varying load and stress conditions and shape optimization opportunities for the production of forged steel, grey cast iron, aluminum and titanium connecting rod. This has entailed performing equivalent stresses which are generated at the surface of the connecting rod. Firstly the two geometric models were developed using CATIA V5 for difference analysis. Therefore, this study has dealt with two subjects, first, gradually changing the cross sectional area of the connecting rod to perform stress analysis at varying load and stress conditions. Second, static load stresses analysis of the connecting rod for four materials. In the present work, after developing the model of connecting rod then it was analyzed in ANSYS 12 workbench that provides a highly interactive and visual environment to analyze product design performance and a finite model was developed. For the first analysis, drawing the conclusion that the stress induced at the smaller end of the connecting rod is greater than the larger end. Therefore, the shifting of stress from the smaller end to the middle of the connecting rod is achieved by gradually reducing the cross sectional area of the shank and in the second analysis, the stresses were found in the different existing model of connecting rod for a given loading condition using ANSYS 12 workbench. The topology is used to achieve the objective of optimization in order to improve the shape of the connecting rod and comparison of strength using different materials.
Authors and Affiliations
Prakash Kumar
Keywords
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