Development of novel auxetic structures from braided composite rods for structural applications

P. Subramani, S. Rana, Daniel V. Oliveira, Raul Fangueiro

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

1 Citation (Scopus)


Auxetic materials are a class of materials that expand transversely when stretched longitudinally. Recently, auxetic materials are gaining special interest in technical sectors mainly due to their attractive mechanical behavior. This paper reports, for the first time, the development of auxetic structures from composite materials and the characterization of their auxetic as well as mechanical properties. The auxetic structures were developed by varying their geometry using core reinforced braided composite rods containing glass fibres for axial reinforcement, polyester filaments for braided structure and epoxy resin as matrix. The auxetic behavior of the structures was studied in a tensile testing machine using an image-based tracking method. The auxetic behavior and the tensile characteristics of the structure depends strongly on the initial geometric configuration of the structures. The Poisson's ratio measured from the structures tested are in the range of -0.30 to -5.15.

Original languageEnglish
Title of host publication16th European Conference on Composite Materials, ECCM 2014
Number of pages8
ISBN (Electronic)9780000000002
Publication statusPublished - 2014
Externally publishedYes
Event16th European Conference on Composite Materials - Seville, Spain
Duration: 22 Jun 201426 Jun 2014
Conference number: 16


Conference16th European Conference on Composite Materials
Abbreviated titleECCM 2014


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