Influence of fibre orientation on the tensile behaviour of ultra-high performance fibre reinforced cementitious composites
| Autor: | Mário Pimentel, Amin Abrishambaf, Sandra Nunes |
|---|---|
| Přispěvatelé: | Faculdade de Engenharia |
| Rok vydání: | 2017 |
| Předmět: |
Materials science
Orientation (computer vision) 0211 other engineering and technologies Biaxial tensile test Concrete engineering Structural engineering Civil engineering 02 engineering and technology Building and Construction Cementitious composite 021001 nanoscience & nanotechnology Engenharia do betão Engenharia estrutural Engenharia civil Casting (metalworking) 021105 building & construction Ultimate tensile strength Hardening (metallurgy) Engenharia civil [Ciências da engenharia e tecnologias] General Materials Science Civil engineering [Engineering and technology] Ultra high performance Composite material 0210 nano-technology Tensile testing |
| Zdroj: | Repositório Científico de Acesso Aberto de Portugal Repositório Científico de Acesso Aberto de Portugal (RCAAP) instacron:RCAAP |
| ISSN: | 0008-8846 |
| DOI: | 10.1016/j.cemconres.2017.03.007 |
| Popis: | The main objective of this study is to quantify the effect of fibre orientation on the tensile behaviour of Ultra-High Performance Fibre-Reinforced Cementitious Composites (UHPFRC). A strategy to align the steel fibres within the matrix based on the activation of an external magnetic field while casting is adopted to achieve a wide range of fibre orientation profiles. The uniaxial tensile test is used for determining the tensile stress-elongation curves of 22 specimens and the quantitative evaluation of the fibre density and orientation characteristics is performed resorting to an image analysis technique. Based on the obtained results it was possible to validate an analytical formulation for determining the tensile strength of UHPFRC and to quantify the involved parameters. It is also shown that length of the hardening branch of the tensile stress-elongation curve is also very well correlated with the same parameters used in the determination of the tensile strength. |
| Databáze: | OpenAIRE |
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