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Crashworthiness analysis of S-shaped structures under axial impact loading

Sobhan Esmaeili-Marzdashti, Sadjad Pirmohammad and Sareh Esmaeili-Marzdashti

Article (2017)

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Cite this document: Esmaeili-Marzdashti, S., Pirmohammad, S. & Esmaeili-Marzdashti, S. (2017). Crashworthiness analysis of S-shaped structures under axial impact loading. Latin American Journal of Solids and Structures, 14(5), p. 743-764. doi:10.1590/1679-78253430
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Abstract

To mitigate shock forces in collision events, thin-walled members are used as energy absorber. In this article, crashworthiness of single-cell and multi-cell S-shaped members with various crosssections including triangular, square, hexagonal, decagon and circular were investigated under axial dynamic loading using finite element code LS-DYNA. Furthermore, crashworthiness of the S-rails with the same outer tubes and different inner ones was studied as well. The multi-cell members employed in this task were doublewalled tubes with several ribs connecting the inner and outer tubes together. Modified multi criteria decision making method known as complex proportional assessment (COPRAS) was used to rank the members using three conflicting crashworthiness criteria namely specific energy absorber (SEA), peak crash force (Fmax) and crash force efficiency (CFE). Moreover, the multi-cell S-shaped members were found to perform better than single-cell ones in terms of crashworthiness. In addition, the multi-cell S-rail with decagonal cross-section was found as the best energy absorber, and also the Srail having the same inner and outer tube with decagonal crosssection displayed desirable rashworthiness performance. Optimum geometry of this S-rail was eventually obtained from the parametric study.

Uncontrolled Keywords

Multi-cell members, S-rails, axial dynamic loading, crashworthiness, COPRAS

Open Access document in PolyPublie
Subjects: 2100 Génie mécanique > 2100 Génie mécanique
2100 Génie mécanique > 2108 Génie aérospatial, aéronautique et automobile
Department: Département de génie mécanique
Research Center: Non applicable
Date Deposited: 16 Aug 2021 14:32
Last Modified: 17 Aug 2021 01:20
PolyPublie URL: https://publications.polymtl.ca/4858/
Document issued by the official publisher
Journal Title: Latin American Journal of Solids and Structures (vol. 14, no. 5)
Publisher: Scientific Electronic Library Online
Official URL: https://doi.org/10.1590/1679-78253430

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