Design and Analysis of Bumper for Three Wheeled Vehicle (Bajaj)
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Date
2017-09-27
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Addis Ababa University
Abstract
This thesis aims for the design and analysis of bumper model using different geometrical shapes
for optimizing a three wheeled vehicle (Bajaj) through addressing the factors that contribute to
causalities and material losses sustained by the rising traffic accident. The study focuses on
design the bumper model for absorbing kinetic energy during collision and sudden accident.
Investigation of the most suitable and optimized geometrical design of three wheeled bumper at
conceptual design stage is carried out using Computer-Aided Engineering. For this reason, the
focus of the design is on increasing energy absorption at the moment of impact and on
minimizing accidental failure of occupants and damage of the components of the vehicle.
Many researchers have identified that a three wheeled vehicle accident causes a catastrophic
failure in human as well as vehicle. So, material selection and design parameter will minimize or
reduce the occurrence of an accident.
This thesis demonstrates the deformation as well as the total energy absorption of the bumper
model subjected to an impact velocity of different magnitude and geometry with a rigid wall for
analysis. During the impact analysis maximum Von Misses stress, total deformation, internal
energy absorption and specific energy absorption is also carried out by Ansys Explicit Dynamic
Analysis for modeling and analysis of the complex bumper geometry for different geometrical
shapes. The model was analyzed by explicit dynamic analysis using ANSYS Workbench
16.Among the two bumper model geometry (hexagonal and rectangular shapes), which are used
for the explicit dynamic analysis, hexagonal geometrical bumper model possess lower VonMisses
stress value, highest internal energy, highest specific energy absorption and the lowest
deformation, in view of rectangular geometry. This demonstrates that that the hexagonal
geometry is better than rectangular bumper model.
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Keywords
Explicit Dynamic analysis, specific Energy Absorption, Deformation, Hexagonal Geometry, Rectangular Geometry, impact