Abstract
The use of non-conventional and innovative materials is increasingly important in automotive design. They allow reductions in the weights of structures with consequent reductions in fuel consumption and carbon dioxide emissions. At the same time, they ensure excellent safety levels. Once excellent results in terms of active and passive safety have been obtained, the attention of car manufacturers, and of the public opinion, is focused on the safety of vulnerable road users (VRU), pedestrians and cyclists. Some examples concerning the redesign of a bonnet with the double targets of weight reduction and pedestrian safety are illustrated. Hybrid metal/plastic and more conventional metal sheet solutions are compared. The static performance (stiffness and denting resistance), as well as the impact against a pedestrian head, are evaluated by means of FEM models along with actual regulations.
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References
Altair Engineerign Inc. (2007). Radioss Starter Manual Version 5.1.
APROSYS (2007). Description of the work — SP7 virtual testing. APROSYS SP1 Report, Deliverable AP-SP11-001.
Asadi, M., Vollaire, A. C., Ashmead, M. and Shirvani, H. (2007). Experimental test and finite element modeling of pedestrian headform impact honeycomb sandwich panel. In EMD. 18th EMD Int. Conf., 3–6 June 2007, Blacksburg, U.S.A.
Avalle, M., Belingardi, G., Ibba, A, Kayvantash, K. and Delcroix, F. (2007). Stochastinc crash analysis of vehicle models for sensitivity analysis and optimization. ESV, 20th ESV Int. Conf., 18–21 June 2007, Lyon, France.
Avalle, M., Kayvantash, K. and Gaviglio, I. (2009). Development of the virtual testing benchmarks (VTB). ESV, 21th ESV Int. Conf., 15–18 June 2009, Stuttgart, Germany.
Dings, J. (2008). Reducing CO2 emissions from new cars: A study of major car manufacturers, progress in 2007, Brussels: European federation for transport and environment AiSBL.
Edelmann, S., Gross, C. and Chladek, H. (2007). LS-Dyna study of the innovative concepts of engine bonnets to improve passive safety of head impact. 6th German LSDyna Forum. 11–12 October 2007, Frankenthal, Germany.
Environmental Protection Agency Office of Transportation and Air Quality (2005). Average Carbon Dioxide Emissions Resulting from Gasoline and Diesel Fuel. Washington, U.S.
Environmental Protection Agency Office of Transportation and Air Quality (2006). Greenhouse Gas Emissions from the U.S. Transportation Sector, 1990–2003, Washington, U.S.
Esping, M., Johannaber, M. and Wohlecker, R. (2006). Simulation of the fuel economy by vehicle mass reduction. ATZ, 108, 18–20.
EuroNCAP (2004). European New Car Assessment Programme (EuroNCAP) — Pedestrian Testing Protocol. V4.1.
European Automobile Manufacturers Association (2008a). European Automobile Industry Report 07/08, Brussels.
European Automobile Manufacturers Association (2008b). Cars, Trucks & Environment, Brussels.
European Commission (2003). L’Europa al Bivio. Trasporti Sostenibili: Una Necessità, Luxembourg.
European Commission (2004). A study on the feasibility and measures relating to the protection of pedestrians and other vulnerable road user — Final report. [Online] Available at:: http://ec.europa.eu/enterprise/automotive/pagesbackground/pedestrianprotection/pedestrian_background.htm, [accessed 13/1/2009].
European Federation for Transport and Environment (2006). How Clean is Your Car Brand?. T&E Publication. Brussels.
European Vehicle Passive Safety Network (2004). Roadmap of Future Automotive Passive Safety Technology Development.
Evans, L. (1991). Traffic Safety and the Driver. Van Nostrand Rheinold. New York.
Friedel, B. and Cesari, D. (2003). European enhanced vehicle safety committee-Status Report for the 18th ESV Cof.. ESV, 18th ESV Int. Conf.. 19–22 May 2003, Nagoya, Japan.
Hardy, R. (2008). Vulnerable road user safety. ATZ Auto Technology, 8, 54–58.
Koch, W. and Howard, M. (2003). Comprehensive approach to increased pedestrian safety. ATZ Worldwide, 105, 20–23.
Koppel, S., Charlton, J., Fildes, B. and Fitzharris, M. (2008). How important is vehicle safety in the new vehicle purchase process? Accident Analysis & Prevention, 40, 994–1004.
Kuehn, M., Froeming, R. and Schindler, V. (2005). Assessment of vehicle related pedestrian safety. ESV 19th ESV Int. Conf., 6–9 June 2005, Washington, USA.
LSTC (2007). LS-Dyna Keyword User’s Manual, II. Livermore Software Technology Corporation.
Neal-Sturgess, C. E., Carter, E., Hardy, R., Cuerden, R., Guerra, L. and Yang, J. (2007). APROSYS European indept pedestrian database. ESV, 20th ESV Int. Conf., 18–21 June 2007, Lyon, France.
NHTSA (2008). Final environmental impact statement. Corporate average fuel economy standards, passenger cars and light trucks, model years 2011–2015. Washington.
Peden, M. (2004). World Report on Road Traffic Injury Prevention: Summary, Geneve. World Health Organization.
Peters, G. A. and Peters, B. J. (2002). Automotive Vehicle Safety. Warrendale. SAE.
Seiffert, U. and Wech, L. (2003). Automotive Safety Handbook. Warrendale. SAE.
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Belingardi, G., Chiandussi, G., Gobetto, E. et al. Bonnet weight reduction and VRU protection: Design proposals implementing non-conventional materials. Int.J Automot. Technol. 11, 831–842 (2010). https://doi.org/10.1007/s12239-010-0099-9
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DOI: https://doi.org/10.1007/s12239-010-0099-9