Application of Advanced Multiphase Steels in Crashworthiness Structures: Experimental Study and Constitutive Equations

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This work presents results of tensile testing of advanced high strength steels of interest for crashworthy structures: Dual-Phase and TRIP (Transformation Induced Plasticity) steels. The improvements in vehicle crashworthiness observed in recent years have been closely linked to advanced high-strength steels that are currently being produced or in process of development. Amongst these, Dual-Phase and TRIP steels have presented excellent properties for use in crashworthy structures. For these steel grades an understanding of material behaviour at relevant strain rates is needed as well as constitutive equations suitable for use in analytic and numerical calculations. For that purpose an experimental program of tensile testing was performed in a range of strain rates of interest for crashworthiness problems: 0.0001 /s to 1000 /s. The test results were used to compare material properties and to evaluate the Cowper-Symonds constitutive equation and a modified version. Crush tests were performed at different speeds for top-hat and hexagonal tubes manufactured using laser welding and the results discussed in view of energy absorption.

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Periodical:

Materials Science Forum (Volumes 514-516)

Edited by:

Paula Maria Vilarinho

Pages:

579-583

DOI:

10.4028/www.scientific.net/MSF.514-516.579

Citation:

N. Peixinho and A. Pinho, "Application of Advanced Multiphase Steels in Crashworthiness Structures: Experimental Study and Constitutive Equations", Materials Science Forum, Vols. 514-516, pp. 579-583, 2006

Online since:

May 2006

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$35.00

[1] M. Marsh, Development of autobody sheet materials for crash performance, in ImechE2000, pp.55-64, (2000).

[2] R. Birch; N. Jones, Measurement of impact loads using a laser Doppler velocimeter, Proc. Instn. Mech. Engrs., Vol. 204, Part C: Journal of Mechanical Engineering Science pp.1-8, (1990).

[3] K. Miura; S. Takagi; O. Furukumi; T. Obara; S. Tanimura, Dynamic deformation behaviour of steel sheet for automobile, SAE paper nº 960019, p.1-, (1996).

DOI: 10.4271/960019

[4] N. Jones, Structural Impact, Cambridge University Press, (1989).

[5] N. Jones, Material properties for structural impact problems, in Advances in Materials and their Applications, P. Rama Rao, ed., Wiley Eastern, New Delhi, pp.151-163, (1993).

[6] N. Peixinho; N. Jones; A. Pinho, Experimental and numerical study in axial crushing of thin- walled sections made of high-strength steels, J. Physique IV, 110, pp.717-722, (2003).

DOI: 10.1051/jp4:20020778

[7] Automotive design manual, version 5. 1, AISI - Auto/Steel Partnership, (1998).

[8] A. Mamalis; D. Manolakos; M. Ioannidis; P. Kostazos; C. Dimitriou, Finite element simulation of the axial collapse of metallic thin-walled tubes with octagonal cross-section, Thin-Walled Structures, Vol. 41(10), (2003).

DOI: 10.1016/s0263-8231(03)00046-6

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