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https://hdl.handle.net/1822/44167
Título: | Development and characterization of novel auxetic structures based on re-entrant hexagon design produced from braided composites |
Autor(es): | Subramani, P Rana, S. Ghiassi, Bahman Fangueiro, Raúl Oliveira, Daniel V. Lourenço, Paulo B. Xavier, José |
Palavras-chave: | Smart materials Mechanical properties Analytical modelling; Mechanical testing Braiding A. Smart materials B. Mechanical properties C. Analytical modelling D. Mechanical testing E. Braiding |
Data: | 15-Mai-2016 |
Editora: | Elsevier |
Revista: | Composites Part B: Engineering |
Resumo(s): | This paper reports the first attempt of developing macro-scale auxetic structures based on re-entrant hexagon design from braided composite materials for civil engineering applications. Braided composite rods (BCRs) were produced and arranged as longitudinal and horizontal elements to produce three types of auxetic structures: (1) basic re-entrant hexagon structure, (2) basic structure modified by adding straight longitudinal elements and (3): structure-2 modified by changing structural angle. The influence of various material and structural parameters as well as structure type on Poisson's ratio and tensile properties was thoroughly investigated. The auxetic behaviour was found to strongly depend on the structural angle and straight elements, resulting in lower auxeticity with lower angles and in presence of straight elements. Material parameters influenced the auxetic behaviour to a lesser extent and a decrease in auxetic behaviour was noticed with increase in core fibre linear density and using stiffer fibres such as carbon. The reverse effect was observed in case of tensile strength and work of rupture. Among these structures, structure-3 exhibited good auxetic behaviour, balanced tensile properties, and high energy absorption capacity and their auxetic behaviour could be well predicted with the developed analytical model. Therefore, these novel structures present good potential for strengthening of civil structures. |
Tipo: | Artigo |
URI: | https://hdl.handle.net/1822/44167 |
DOI: | 10.1016/j.compositesb.2016.02.058 |
ISSN: | 1359-8368 |
Arbitragem científica: | yes |
Acesso: | Acesso aberto |
Aparece nas coleções: | DET/2C2T - Artigos em revistas internacionais com arbitragem científica ISISE - Artigos em Revistas Internacionais |
Ficheiros deste registo:
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1_2016 Development and characterization of novel auxetic structures based on re-entrant hexagon design produced from braided composites.pdf | 568,26 kB | Adobe PDF | Ver/Abrir |