02-08-2013, 02:49 PM
Modeling and Analysis of Two Wheeler Connecting Rod
Two Wheeler Connecting .pdf (Size: 639.98 KB / Downloads: 174)
ABSTRACT:
The connecting rod is the intermediate
member between the piston and the Crankshaft. Its primary
function is to transmit the push and pull from the piston pin
to the crank pin, thus converting the reciprocating motion
of the piston into rotary motion of the crank.
Existing connecting rod is manufactured by using
Carbon steel. This paper describes modeling and analysis
of connecting rod. In this project connecting rod is replaced
by Aluminum reinforced with Boron carbide for Suzuki
GS150R motorbike. A 2D drawing is drafted from the
calculations. A parametric model of connecting rod is
modelled using PRO-E 4.0 software. Analysis is carried out
by using ANSYS software.
INTRODUCTION
Connecting rods are widely used variety of
engine. The function of connecting rod is to transmit the
thrust of the piston to the crank shaft, and as the result the
reciprocating motion of the piston is translated into
rotational motion of the crank shaft. It consist of a pin –end.
A shank section, and crank an end .Pin end and crank end
pin holes are machined to permit
accurate fitting of 1.
bearings. One end of the connecting rod is connected to the
piston by the piston pin. Connecting rods are subjected to
forces generated by mass and fuel combustion .Theses two
forces results in axial load and bending stresses. A
connecting rod must be capable of transmitting axial 2.
tension, axial compression, and bending stress caused by
the thrust and full of the piston and by centrifugal force.
Finite element (FEM) Modal is a modern way for fatigue
analysis and estimation of the component .The influential
component factors are able to change such as material
.cross section conditions etc.
SPECIFICATION OF THE PROBLEM
The objective of the present work is to design and
analyses of connecting rod made of Aluminum Reinforced
with Boron carbide. Steel and aluminum materials are used
to design the connecting rod. In this project the material
(carbon steel) of connecting rod replaced with Aluminum
Reinforced with Boron carbide. Connecting rod was created
in Pro-E. Model is imported in ANSYS 12.0 for analysis.
After analyis a comparison is made between exisisting steel
and aluminum connecting rod viz., Aluminum Reinforced
with Boron carbide in terms of weight, factor of safety,
stiffnes, deformation and stresse.
THEORETICAL CALCULATIONS OF
CONNECTING ROD
A connecting rod is a machine member which is subjected
to alternating direct compressive and tensile forces. Since
the compressive forces are much higher than the tensile
force, therefore the cross-section of the connecting rod is
designed as a strut and the Rankin formula is used.
A connecting rod subjected to an axial load W may buckle
with x-axis as neutral axis in the plane of motion of the
connecting rod, {or} y-axis is a neutral axis. The
connecting rod is considered like both ends hinged for
buckling about x-axis and both ends fixed for buckling
about y-axis. A connecting rod should be equally strong in
buckling about either axis.
STRUCTURAL ANALYSIS OF
CONNECTING ROD
Dimensions of Width and height of the conecting
rod is For C.S = 12.8mm and For AL 360 = 16.4 mm. A 3-
D model of connecting is used for analysis in ANSYS 12.0.
The loading conditions are assumed to be static. Analysis
done with pressure load applied at the piston end and
restrained at the crank end or other load applied at the crank
end and restrained at the piston end. The element choosen is
SOLID 187, it was used with the tetrahedral option, making
it a 10-node element with 3 degrees of freedom at each
node. The finite element analysis is carried out on carbon
steel connecting rod as well as on three different materials
of carbon steel, aluminum boron carbide and aluminum
360. From the analysis the equivalent stress (Von-mises
stress), strain, displacements were determined and are
shown in figure 4-15. Table 2 shows the comparative of
factor of safety for three different materials.
CONCLUSIONS
By checking and comparing the
results of materials in above tables and finalizing the results
are shown in below.