Design and analysis of air bag based front bumper system

Abstract

It is known that safe transportation is one of the biggest concerns of vehicle manufacturers; Automobile accidents threaten human lives and have become a socio-economic problem ,and occupant safety in vehicle accidents is a great challenge. The severity of the crash reflects the energy absorption of the car's structure during the accident and also has a close relationship with the amount of energy absorbed by the restraint system. Among the components involved in the restraint system, the front vehicle bumper is the most common one. In the past, important variables like material, structures, shapes and impact conditions were studied for analysis of the bumper in order to improve its crashworthiness during a collision; but this alternative solution did not face the harmful consiquences of the accident . This study is focused on the design and analysis of an air-bag based bumper system. The Air-bag based bumper system is a new feature in which the front bumper with air-bag is designed and analysed with ANSYS. The outside air-bag system, which is fitted in front car bumper, is designed to improve. In this study mainly, impact analysis performed at moderate speed of 40km/hr, 50km/hr and 60km/hr dynamic explicitly ANSYS package software and comparative study of bumper with air bag system and bumper without air bag system ,energy absorption of the system measured after collision are performed and the energy absorption of the airbag 193KJ, 240KJ and 256KJ at vehicle speed of 40Km/hr,50Km/hr and 60Km/hr with pressure of 2.731 MPa, 3.416MPa and 4.1MPa respectively, but the conventional one absorbed 1.68KJ,2.4KJ and 3.71KJ with external pressure of 2.731MPa, 3.416MPa and 4.1 MPa. Therfore, it conclude that the new airbag based bumper is better energy absorber than the conventional one. The significant of the study is it can reduce loss of human lives, chassis damage of the vehicle due to low transmission of energy to the vehicle body