Damage mechanisms characterization of flax fibers–reinforced composites with interleaved natural viscoelastic layer using acoustic emission analysis
| Autor: | Isabelle Gimenez, Abderrahim El Mahi, Hajer Daoud, Mohamed Taktak, Jean-Luc Rebiere, Mohamed Haddar |
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| Přispěvatelé: | Laboratoire d'Acoustique de l'Université du Mans (LAUM), Centre National de la Recherche Scientifique (CNRS)-Le Mans Université (UM), Laboratoire de recherche de Mécanique, Modélisation et Production (LA2MP), Université de Sfax - University of Sfax-École Nationale d'Ingénieurs de Sfax | National School of Engineers of Sfax (ENIS), Centre de Transfert de Technologie du Mans (CTTM) |
| Jazyk: | angličtina |
| Rok vydání: | 2019 |
| Předmět: |
tensile
Materials science Composite number Composite 02 engineering and technology Viscoelasticity [SPI]Engineering Sciences [physics] 0203 mechanical engineering Flexural strength Ultimate tensile strength Materials Chemistry Composite material natural viscoelastic layer Mechanical Engineering 021001 nanoscience & nanotechnology Characterization (materials science) 020303 mechanical engineering & transports Acoustic emission Mechanics of Materials flax fibers Ceramics and Composites fatigue 0210 nano-technology Layer (electronics) damage flexural |
| Zdroj: | Journal of Composite Materials Journal of Composite Materials, SAGE Publications, 2019, 53 (18), pp.2623-2637. ⟨10.1177/0021998319836236⟩ |
| ISSN: | 0021-9983 |
| DOI: | 10.1177/0021998319836236⟩ |
| Popis: | International audience; In this paper, the static and fatigue behavior of flax fiber-reinforced composites with and without an interleaved natural viscoelastic layer are investigated. Viscoelastic composite plates consist of a soft natural viscoelastic layer which is confined between two identical flax fiber reinforced composites. Different stacking sequences of specimens are tested with uniaxial tensile loading until failure. The mechanical behavior and the acoustic activity of damage sources in various configurations with and without a viscoelastic layer are compared. The analysis of acoustic emission signals and the macroscopic and microscopic observations led to the identification of the main acoustic signatures of different damage modes dominant in each type of composites (with and without a viscoelastic layer). These results allow better identification of the influence of the impact of a viscoelastic layer on the mechanical behavior of different composites. In addition, static and fatigue flexural behavior of unidirectional composites with and without viscoelastic layer are characterized in 3-point bending tests. The effects of viscoelastic layer on the stiffness, hysteresis loops, and loss factor are studied for various numbers of cycles during cyclic fatigue. |
| Databáze: | OpenAIRE |
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