Design and analysis of Front Bumper for Light Passenger Vehicles

Authors: Nitesh joshi, Rupesh tiwari , G.V.R.Seshagiri Rao

Certificate: View Certificate

Abstract

Car accidents are happening every day. If, we take into account the statistics, ten thousand dead and hundreds of thousands to million wounded each year. These numbers call for the necessity to improve the safety of automobiles during accidents. Automotive bumper system is one of the key systems in passenger cars which help to protect the vehicle during impacts. Bumper is one of the main parts which are used as protection for passengers from front and rear collision. The aim of this study is to analyze and study the structure and material employed for car bumper in one of the car manufacturer. In this, the most important variables like material, structures, shapes and impact conditions are studied for analysis of the bumper beam in order to improve the crashworthiness during collision. The model of the bumper is drawn in Ansys 14.0 considered thickness as 10 mm. Structural analyses has been performed for all the two cases and the results obtained are compared with the standard previous results. Keywords: Bumper, FEM, Impact Test, Ansys 14.0.

Introduction

Car accidents are happening every day. Most drivers are convinced that they can avoid such troublesome situations. The front and rear of the vehicle should be protected in such a manner that low speed collisions will only damage the vehicle slightly, or not at all. For this purpose front and rear bumpers were invented. The uses of bumpers has evolved from being a mechanism placed on the front and rear of the car to protect the body and safety features of a motor vehicle from damage due to a low speed collision to a decorative ornament designed more for the aesthetics of the motor vehicle rather than the actual functionality

Conclusion

As we knew through several tests made to identify the suitable material useful for Bumper is Polyethylene. We were trying to get the better design and feasible thicknesses (considering manufacturing feasibility). This report shows us the Polyethylene bumper made of 10 mm thick. The objective is to get a better optimized design with comparative deflection and stress contours with very less plastic strain in the beam (assuming the rest of parts in the vehicle as lumped mass). Finite element method is used to perform these tests non-physically. Thus, Setup and boundary conditions were made more physically as illustrated in the earlier slides. A result from FE Data explains that the optimized design is very useful to continue the further research on assuming various materials to the required mass of the vehicle.