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Toward lightweight smart automotive hood structures for head impact mitigation: Integration of active stiffness control composites
RISE - Research Institutes of Sweden, Materials and Production, SICOMP.
University of Florence, Italy.
Technical University of Kaiserslautern, Germany.
2019 (English)In: Journal of Intelligent Materials Systems and Structures, ISSN 1045-389X, E-ISSN 1530-8138, Vol. 31, no 1, p. 71-83Article in journal (Refereed) Published
Abstract [en]

Recently, novel material concepts for high-performance carbon fiber–reinforced composites with active stiffness control were presented in the literature. Although this new class of intelligent, smart, and responsive materials has wide application potential, actual design concepts using active stiffness control are still rare. The integration of smart materials into conventional products often requires radically new design concepts. This communication presents an innovative automotive hood design concept, which integrates active stiffness control composites in order to achieve improved design performance trade-offs in terms of structural weight reduction and vulnerable road user safety. The integration of active stiffness control composites in the hood structure aims to enable active stiffness reduction of the hood or bonnet structure in order to reduce head impact injuries in case of a collision, while satisfying the structural stiffness requirements and lightweight objectives under normal operating conditions. The design concept is investigated using simulation-based evaluation of static, dynamic, and lightweight design criteria. The results are promising, and the presented concept design is a step toward the realization of lightweight smart hood structures for head impact mitigation. Several design features could also be of interest for the integration of active stiffness control composites, in other applications. © The Author(s) 2019.

Place, publisher, year, edition, pages
SAGE Publications Ltd , 2019. Vol. 31, no 1, p. 71-83
Keywords [en]
Active stiffness control composites, automotive design, composite materials, smart materials, smart structures, vulnerable road user safety
National Category
Natural Sciences
Identifiers
URN: urn:nbn:se:ri:diva-40884DOI: 10.1177/1045389X19880016Scopus ID: 2-s2.0-85074246505OAI: oai:DiVA.org:ri-40884DiVA, id: diva2:1373324
Note

Funding details: European Commission, EU, 314567; Funding text 1: Vyas Gaurav M 1 André Alann 1 https://orcid.org/0000-0001-9358-169X Sala Ramses 2 3 1 RISE SICOMP, Mölndal, Sweden 2 Department of Industrial Engineering, University of Florence, Florence, Italy 3 Department of Mechanical and Process Engineering, Technical University of Kaiserslautern, Kaiserslautern, Germany Ramses Sala, Department of Industrial Engineering, University of Florence, Via di Santa Marta 3, 50139 Florence, Italy. Email: sala@rhrk.uni-kl.de 10 2019 1045389X19880016 © The Author(s) 2019 2019 SAGE Publications Recently, novel material concepts for high-performance carbon fiber–reinforced composites with active stiffness control were presented in the literature. Although this new class of intelligent, smart, and responsive materials has wide application potential, actual design concepts using active stiffness control are still rare. The integration of smart materials into conventional products often requires radically new design concepts. This communication presents an innovative automotive hood design concept, which integrates active stiffness control composites in order to achieve improved design performance trade-offs in terms of structural weight reduction and vulnerable road user safety. The integration of active stiffness control composites in the hood structure aims to enable active stiffness reduction of the hood or bonnet structure in order to reduce head impact injuries in case of a collision, while satisfying the structural stiffness requirements and lightweight objectives under normal operating conditions. The design concept is investigated using simulation-based evaluation of static, dynamic, and lightweight design criteria. The results are promising, and the presented concept design is a step toward the realization of lightweight smart hood structures for head impact mitigation. Several design features could also be of interest for the integration of active stiffness control composites, in other applications. Active stiffness control composites smart structures smart materials composite materials automotive design vulnerable road user safety European Commission https://doi.org/10.13039/501100000780 314567 edited-state corrected-proof The authors would like to thank Mr Leif Hagebeuker and Mr Frederic Nuss at the Institute for Automotive Engineering of RWTH Aachen University, Germany, for their involvement with the HIC evaluations and the static stiffness tests of the benchmark hoods. We are also grateful to Oxeon AB, Sweden, for providing the composite material for the inner hood structure. Declaration of conflicting interests The author(s) declared no potential conflicts of interest with respect to the research, authorship, and/or publication of this article. Funding The author(s) disclosed receipt of the following financial support for the research, authorship, and/or publication of this article: This study was funded by the European Commission within the project ENLIGHT (grant agreement no: 314567). ORCID iD Ramses Sala https://orcid.org/0000-0001-9358-169X

Available from: 2019-11-26 Created: 2019-11-26 Last updated: 2020-01-10Bibliographically approved

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