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Design and Analysis of an Automobile Bumper with the Capacity of Energy Release Using GMT Materials

Authors: A.R. Mortazavi Moghaddam, M. T. Ahmadian


Bumpers play an important role in preventing the impact energy from being transferred to the automobile and passengers. Saving the impact energy in the bumper to be released in the environment reduces the damages of the automobile and passengers. The goal of this paper is to design a bumper with minimum weight by employing the Glass Material Thermoplastic (GMT) materials. This bumper either absorbs the impact energy with its deformation or transfers it perpendicular to the impact direction. To reach this aim, a mechanism is designed to convert about 80% of the kinetic impact energy to the spring potential energy and release it to the environment in the low impact velocity according to American standard1. In addition, since the residual kinetic energy will be damped with the infinitesimal elastic deformation of the bumper elements, the passengers will not sense any impact. It should be noted that in this paper, modeling, solving and result-s analysis are done in CATIA, LS-DYNA and ANSYS V8.0 software respectively.

Keywords: Impact, Composite Material, Bumper, Energy Release, GMT

Digital Object Identifier (DOI):

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[1] "The Research Requirements of the Transport Sectors to Facilitate an Increased Usage of Composite Materials" - Part II June 2004.
[2] Yuxuan Li. Zhogqin Lin. Aiqin J.Guanlong Chen. "Experimental study of glass fiber mat thermoplastic material impact properties and lightweight automobile body analysis" .J Material & Design. Elsevier 2004; 579-585.
[3] Steve Ickes M-Tek, "Development of Low Density Glass Mat Thermoplastic Composites for Headliner Applications "Inc. Paper No. 2000-01-1129.
[4] "The Rate Influence on Mechanical Properties of GMT" Technical Information of Quadrant Plastic Composites site.
[5] "Glass Mat Reinforced Thermoplastics, Processing Guidelines", Quadrant Plastic Composite AG, GMT Parts, Edition 2.1.
[6] James Crandall and Dinesh Bhutani," Design of a New Bumper Beam Using Structural Thermoplastic Composite," Society of Automotive Engineers (SAE) Technical Paper Series, Paper No. 930542, SAE, Warrendale, PA, 1993.
[7] Christopher Clark, Peter Bejin, "A Comparison of C-Shaped and I-Type Cross-Sections for Bumpers Using Compression Molded Thermoplastics," Society of Automotive Engineers (SAE) Technical Paper Series, Paper No. 940171 SAE, Warrendale, PA 1994.
[8] Walt Bassett, Gerry Battino, "Advanced GMT Technology Boosts Performance of Automotive Bumper Components," Society of Automotive Engineers (SAE) Technical Paper Series, Paper No. 970480, SAE, Warrendale, PA, 1997.
[9] Cheon, S.S., Choi, J.H., and Lee, D.G., "Development of the composite bumper beams for passenger cars", Composite Structures, (1995), 32:491-499.
[10] Minaudo, B.P., Rawson, J., and Montone, M, "Development of a onepiece, injection moulded, thermoplastic rear bumper system with pole impact protection", (1997), SAE Technical paper 970483.
[11] Clark, C.L., Bals, C.K., and Layson, M.A., "Effects of fibre and property orientation ÔÇÿC- shaped cross sections", (1991), SAE Technical Paper 910049.
[12] Cheon, S.S., Lim, T.S., and Lee, D.G., "Impact energy absorption characteristics of glass fiber hybrid composites" Composite Structures, (1999), 46:267-278.
[13] Gilliard, B., Bassett, W., Haque, E., Lewis, T., Featherman, D., and Johnson, C., "I-section bumper with improved impact performance from new mineral-filled glass mat thermoplastic (GMT) composite", (1999), SAE Technical Paper 1999-01-1014.
[14] "Structural Bumper Beams made in GMTexTM" Technical Information , Quadrant Plastic Composites site.
[15] "Steel bumper system for passenger cars and light trucks" American Iron and Steel Institute. Revision no.2 February 15/2003.
[16] Paolo F. Attilio M."Development of carbon /epoxy structural components for high performance vehicles".J Composite .Elsevier 2004.
[17] Tao XM, Yu TX, Ngan KM, Ko FK. "Energy absorption of cellular textile composite under quasi-static compression", In: ICCE/4, Hawaii, USA, July; 1997. p. 981-2.
[18] Yu TX, Tao XM, Wu KQ. "Energy absorption of cellular textile composite under impact", In: ICCE/4, Hawaii, USA, July; 1997. p. 1099-100.
[19] Yu TX, Tao XM, Xue P. "The energy-absorbing capacity of grid-domed textile composites", Compos Sci Technol 2000; 60:785-800.
[20] S.W.Lam, X.M.Tao, T.X.Yu "Comparison of different thermoplastic cellular textile composites on their energy absorption capacity" J .composite science and technology 64 (2004) 2177-2184.
[21] E.Mahdi, A.M.S.Hamouda, B.B.Sahari,Y.A.Khalid "Experimental quasi-static axial crushing of cone-tube-cone composite system" J. composites: part B 34 (2003) 285-302.
[22] A.A.A. Alghmadi "Collapsible impact energy absorbers: an overview" J. thin-walled structures 39 (2001) 189-213.
[23] "Handbook of composites" edited by S.T. Peters, 2nd ed. London Chapman and Hall 1998.
[24] "United States National Highway Traffic Safety Administration (49 CFR), part 581& part 571.208 Bumper Standard.
[25] Ed.Hall "Optimization with the Genetic Algorithm /Direct Search Toolbox" Research computing support center. [email protected]