International Research Journal of Engineering and Technology (IRJET)
e-ISSN: 2395 -0056
Volume: 04 Issue: 02 | Feb -2017
p-ISSN: 2395-0072
www.irjet.net
FINITE ELEMENT ANALYSIS OF CONNECTING ROD FOR TWO WHEELER AND OPTIMIZATION OF SUITABLE MATERIAL UNDER STATIC LOAD CONDITION Mr.Ruchir Shrivastava1 1 Asst. Professor, Department of Mechanical Engineering, RSR Rungta College of Engineering and Technology Bhilai490024 (C.G), India. 51/617, Tarun Nagar, Kushalpur, Raipur, C.G., India 492001
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Abstract - Connecting rod is a major mechanical element
for any vehicle engine .It transmits push and pulls from the piston pin to the crank pin with the help of pressure of burnt gases in the engine piston cylinder thus converting the reciprocating motion of piston into rotamotion of the crank. The connecting rod is therefore considered as a key component in terms of reliability and performance of an engine. In the present investigation a 4-stroke petrol engine of a specified model Hero splendor, market available connecting rod is selected for the static load analysis. A parametric model of connecting rod is modeled using CRE-O (2.0) software. Analysis has done by using ANSYS (APDL) software. Static analysis is done to determine von-misses stresses, strain, shear stress and total deformation and comparing the results for different aspects of design like stress concentration due to sudden change in the cross section and factor of safety for static load condition. In this analysis two materials are selected and analyzed. The software results of two materials are compared and utilize for designing of connecting rod.
Key Words: Connecting rod, Static analysis, CRE-O parametric, ANSYS (APDL), Finite element analysis. 1. INTRODUCTION
Connecting rod is a major mechanical kinematic link inside of a internal combustion engine. It connects the piston with the crank and main component for transferring power from the piston to the crankshaft and sending it to the gear transmission system of vehicle. Now days for production of connecting rod different types of materials are available and used for manufacturing method for the same. Materials used for connecting rods are steel and aluminum. Manufacturing processes which followed by the most manufacturer are casting, forging and powdered metallurgy. Connecting rod is known for mass production component in the I.C engine. Manufacturer of connecting rods among the world have used different types of materials and production methods in the creation of connecting rods. In operation the major stresses induced in the cone rod are mixture of axial and bending stresses. The axial stresses are produced due to cylinder burnt gas pressure (compressive only) and the inertia force Š 2017, IRJET
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Impact Factor value: 5.181
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arising in account of reciprocating action (both tensile as well as compressive), where as bending stresses are responsible for the centrifugal effects. The major parts of connecting rods are long shank, a small end and a big end. The cross-section of the shank may be rectangular, circular, tubular, I-section or H-section. Often circular section is used for low speed engines while I-section is preferred for high speed engines. There are manufacturing processes like casting, forging, and powder metallurgy. Connecting rod is subjected to a complex state of loading. It comes under high cyclic loads of the order of 108 to 109cycle. Which range from high compressive loads due to combustion, to high tensile loads due to inertia [1]. Failure of a connecting rod, it called "throwing a rod" .It is one of the most common causes of catastrophic Engine failure in cars, when rod broken then frequently putting the broken rod through the side of the crankcase and thereby rendering the engine irreparable. It can be easily replaceable component. it can result from fatigue near a physical defect in the rod, lubrication failure in a bearing due to faulty maintenance, or from failure of the rod bolts from a defect, improper tightening, or re-use of already used (stressed) bolts where not recommended. Now a day’s automotive internal combustion engine, it has connecting rods are most usually made of steel for production engine. For the connecting rod they are not rigidly fixed at either end, so that the angle between the connecting rod and piston can change when rod moves up and down and rotates around the crank shaft. The connecting rod is under tremendous stress from the reciprocating load represented by the piston, actually stretching and being compressed with every rotation. The load increases to the third power with increasing engine speed. Vehicle has connecting rod that is dynamic component, it transmits the axial cyclic motion of piston to the rotational motion of crankshaft. The connecting rod is considered as a key component in terms of the structural durability and ISO 9001:2008 Certified Journal
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