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Stiffness-modifiable composite for pedestrian protection
RISE - Research Institutes of Sweden (2017-2019), Materials and Production, SICOMP.ORCID iD: 0000-0002-5988-2293
RISE - Research Institutes of Sweden (2017-2019), Materials and Production, SICOMP. Luleå University of Technology, Sweden.ORCID iD: 0000-0003-3755-6419
RISE - Research Institutes of Sweden (2017-2019), Materials and Production, SICOMP.
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2014 (English)Conference paper, Published paper (Refereed)
Abstract [en]

A novel functional material allowing stiffness-reduction upon external stimulation was developed. Implementation of such technology in the design of a car front has high potential to result in increased protection of vulnerable road users (VRUs). The composite material is obtained by coating carbon fibres with a thermoplastic polymer in a continuous process, followed by infusion with an epoxy resin. The process is scalable for industrial use. The coating process was optimized regarding coating efficiency, energy consumption, risks involved for operating personnel and environment, and tailored to gain the optimal coating thickness obtained from numerical calculations. A drastic decrease in transversal stiffness could be detected for the composite material by dynamic mechanical thermal analysis (DMTA), when the temperature was increased above the glass transition temperature of the thermoplastic interphase. The ability of the material to achieve such temperature and associated reduction in stiffness by the application of current was verified using a special 3-point bending setup developed for this task.

Place, publisher, year, edition, pages
European Conference on Composite Materials, ECCM , 2014.
Keywords [en]
Fibre/matrix interface, Pedestrian protection, Stiffness-variable composite
National Category
Materials Engineering
Identifiers
URN: urn:nbn:se:ri:diva-13076Scopus ID: 2-s2.0-84915756456ISBN: 9780000000002 (print)OAI: oai:DiVA.org:ri-13076DiVA, id: diva2:973272
Conference
16th European Conference on Composite Materials, ECCM 2014
Available from: 2016-09-22 Created: 2016-09-22 Last updated: 2023-05-16Bibliographically approved

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Bachinger, AngelikaMarklund, Erik

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