Design of Crash Worthy Impact Attenuator for Racing Automotive Applications: Explicit Nonlinear FEM Formulation

Konstantinos Anyfantis

Research output: Chapter in Book/Report/Conference proceedingArticle in proceedingsResearchpeer-review

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Abstract

The design of crashworthy structures is a very important issue in automotive. Structures able to absorb a great amount of energy during impact are a challenge for automotive engineers nowadays. Currently, computer simulation is an efficient and cost-effective manner of designing structures. This paper is focused on the prediction of the behavior of the impact attenuator on a vehicle used for the Annual Formula SAE competition. The impact attenuator is made of expanded aluminum sheets joined by spot welding. The behavior of the crash zone is time sensitive (inertia effects) and extreme deformations occur during a collision. The commercial software LS-DYNA is used, which incorporates robust and effective explicit non-linear algorithms, for the prediction of the time dependent behavior of the impact attenuator. The finite element simulation has taken into account geometrical (contact and large deformations) and material nonlinearities. The results show the worthiness of the crash zone and its ability to smoothly absorb great amounts of energy.
Original languageEnglish
Title of host publicationProceedings
Number of pages6
Publication date2008
Publication statusPublished - 2008
Externally publishedYes
EventANSYS Conference & 26th CADFEM Users’ Meeting 2008 - Darmstadt, Germany
Duration: 22 Oct 200824 Oct 2008

Conference

ConferenceANSYS Conference & 26th CADFEM Users’ Meeting 2008
CountryGermany
CityDarmstadt
Period22/10/200824/10/2008

Bibliographical note

ANSYS Conference & 26th CADFEM Users’ Meeting 2008
October 22-24, 2008
darmstadtium wissenschaft|kongresse, Darmstadt, Germany

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