Engineering an Ultra-Light Bumper for Passenger Vehicles

This study investigates the design and development of lightweight bumpers for four-wheeled vehicles, focusing on optimizing safety, efficiency, and aesthetics. It examines the evolution of bumper technology from steel structures to advanced composites, analyzing their impact on vehicle performance and crash safety. The research evaluates various materials for bumper components, including aluminium alloys, ABS plastics, carbon fiber-reinforced plastics for the body, and expanded polypropylene and polyethylene foam for energy absorbers. The study simulates bumper performance under low-velocity impact conditions using computer-aided design and finite element analysis. Three energy absorption geometries - triangular, diamond, and honeycomb structures - are assessed for crash scenarios. The paper highlights trade-offs between design complexity, manufacturing considerations, and energy absorption performance. This comprehensive study contributes to the understanding of bumper design optimization, material selection, and performance evaluation, offering valuable insights for automotive engineers developing next-generation vehicle safety systems. The main findings indicate that ABS polymer is the best material for bumper bodies because it offers the best impact resistance and the least amount of deformation while achieving significant weight reduction as compared to conventional materials. Although production difficulty must be taken into account, the best strength absorption and deformation characteristics in electricity absorber design are shown by the hexagonal cross-sectional shape in vertical orientation. While polyethylene foam performs well in prolonged impact situations, expanded polypropylene is more effective for initial impact absorption in power absorbers, indicating the possibility of hybrid solutions in future designs.