International Journal of Material Forming

, Volume 3, Supplement 1, pp 1111–1114

Non-conventional technologies for the manufacturing of anti-intrusion bars

Non-conventional processes: L. Santo


Design and manufacturing issues are here studied about the production of hollow structures made of an outer high resistance skin and a metal foam filler. These structures can be very useful as reinforcements against lateral impacts of vehicles. In car bodies, at the waistline or door height, the available space is very limited. Compact bars with light weight, high energy absorption efficiency and limited maximum deflection (i.e. high maximum load) are required. The skin of the proposed structure provides strength and stiffness and can be assembled to the vehicle body. The foam core provides energy absorption properties. The combination of non conventional technologies (hydroforming and metal foams) allows for the production of lightweight, high performance components, particularly suited for flexural resistance in terms of amount of energy absorbed for a given maximum load. A performance indicator y is proposed with the aim of comparing the performance of side impact absorbers with different cross sections and made of different materials. The tube hydroforming process is investigated as a suitable way for performance improvement of metal foam filled structures in side impacts, particularly for non-constant section bars.


metal foams tube hydroforming lateral vehicle crash 


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  1. [1]
    Bloch B.: On the safe side. Crash test technology international 4–8, June 2009.Google Scholar
  2. [2]
    Alwan J.M., Wu C.-C., Sheng T.H. et al.: Light Weight Steel Technology Used in A Vehicle Design: Safety CAE Analysis. American Soc. of Mech. Eng., AMD 250:57–71, 2001Google Scholar
  3. [3]
    Mildenberger U.: Planning for an environment-friendly car. Technovation 20(4):205, 2000Google Scholar
  4. [4]
    Ashby M.F., Evans A.G., et al.: Metal Foams: A Design Guide. Butterworth Heinemann 2000.Google Scholar
  5. [5]
    Johnson, W. Mamalis, A.G., Crashworthiness of Vehicles, Mechanics Engineering Publications, London, 1978.Google Scholar
  6. [6]
    Zarei H.R., Krogger M.: Bending behavior of empty and foam-filled beams: Structural optimization. Int. J. of Impact Engineering 35:521–529, 2008.Google Scholar
  7. [7]
    Santosa S., Banhart J., Wierzbicki T.: Experimental and numerical analyses of bending of foam-filled sections. Acta Mechanica 148:199–213, 2001.Google Scholar
  8. [8]
    Carrino L., Durante M., Franchitti S., Strano M.: On the Optimization of the Properties of Foam Filled Tubular Structure Using FEM. 2nd Int. Symposium on Cellular Metals for Structural and Functional Applications, CELLMET, Dresden 2008.Google Scholar
  9. [9]
    Schäffler P., Aluminium Foam Potentials for the Automotive and other Industries, Metfoam 2009, Bratislava 2009.Google Scholar
  10. [10]
    Gagliardi F., De Napoli L., Filice L. et al.: A comparison among FE models to simulate metallic foams forming. Materials and Design 30: 1282–1287, 2009.Google Scholar
  11. [11]
    Hanssen A.G. et al.: Validation of constitutive models applicable to aluminium foams. Int. J. of Mechanical Sciences 44:359–406, (2002).Google Scholar

Copyright information

© Springer-Verlag France 2010

Authors and Affiliations

  1. 1.Politecnico di Milano – Dipartimento di MeccanicaMilanoItaly
  2. 2.Laboratorio MUSPPiacenzaItaly

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