10-09-2013, 04:53 PM
STRUCTURAL ANALYSIS OF TWO WHEELER SUSPENSION FRAME
STRUCTURAL ANALYSIS.pdf (Size: 540.88 KB / Downloads: 158)
ABSTRACT
The two-wheeler chassis consists of the frame, suspension,
wheels and brakes. The chassis truly sets the overall style of
the two-wheeler. Automotive chassis is the main carriage
systems of a vehicle. The frame serves as a skeleton upon
which parts like gearbox and engine are mounted. It can be
made of steel, aluminum or an alloy.
It is essential that the frame should not buckle on
uneven road surfaces and that any distortions which may occur
should not be transmitted to the body. The frame must
therefore be torsion resistant.
The aim of the project is to model a frame using 3D
modeling software Pro/Engineer. To validate the strength of a
frame, Structural analysis is done by applying the wheel
forces. In this analysis ultimate stress limit for the model is
determined. Analysis is done for frame using four materials
alloy steel, aluminum alloy A360, magnesium and carbon
fiber reinforced polymer to verify the best material for frame.
Model analysis is also done to determine different mode
shapes for number of modes. Analysis is done in ANSYS
software
INTRODUCTION
Motorcycle Chasis
The motorcycle chassis consists of the frame,
suspension, wheels and brakes. Each of these components is
described briefly below.
Frame
Motorcycles have a frame made of steel, aluminum
or an alloy. The frame consists mostly of hollow tubes and
serves as a skeleton on which components like the gearbox
and engine are mounted.
Suspension
The frame also serves as a support for the suspension
system, a collection of springs and shock absorbers that helps
keep the wheels in contact with the road and cushions the rider
from bumps and jolts.
COMPUTER AIDED DESIGN (CAD)
Computer-aided design (CAD), also known as computer-
aided design and drafting (CADD), is the use of computer
technology for the process of design and design-
documentation. Computer Aided Drafting describes the
process of drafting with a computer. CADD software, or
environments, provides the user
With input-tools for the purpose of streamlining design
processes; drafting, documentation, and manufacturing
processes.
CAD is mainly used for detailed engineering of 3D models
and/or 2D drawings of physical components, but it is also used
throughout the engineering process from conceptual design
and layout of products, through strength and dynamic analysis
of assemblies to definition of manufacturing methods of
components. It can also be used to design objects.
PRO/ENGINEER:
Pro/ENGINEER Wildfire is the standard in 3D product
design, featuring industry-leading productivity tools that
promote best practices in design while ensuring compliance
with your industry and company standards. Integrated
Pro/ENGINEER CAD/CAM/CAE solutions allow you to
design faster than ever, while maximizing innovation and
quality to ultimately create exceptional products.
CONCLUSION
In our project we have modelled a suspension frame
used in two-wheeler. Modelling is done in Pro/Engineer.
We have done structural and modal analysis on
suspension frame using four materials Steel,
Aluminium Alloy A360, Magnesium and carbon
fiber reinforced polymer to validate our design.
By observing the results, for all the materials the
stress values are less than their respective permissible
yield stress values. So our design is safe.
By comparing the results for four materials, stress
obtained is same and displacement is less for carbon
fiber reinforced polymer than other three materials.
So we conclude that for our design, CFRP is better
material for suspension frame.