Eyasu, Woldesenbet (Prof.)Tewodros, Gebremichaiel2020-11-272023-11-182020-11-272023-11-182017-09-27http://etd.aau.edu.et/handle/12345678/23645This 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.en-USExplicit Dynamic analysisspecific Energy AbsorptionDeformationHexagonal GeometryRectangular GeometryimpactThesis