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Deeper insights into the moisture-induced hygroscopic and mechanical properties of hemp reinforced biocomposites
- Source :
- Composites Part A: Applied Science and Manufacturing, Composites Part A: Applied Science and Manufacturing, Elsevier, 2019, 123, pp.278-285. ⟨10.1016/j.compositesa.2019.05.006⟩
- Publication Year :
- 2019
- Publisher :
- HAL CCSD, 2019.
-
Abstract
- This article provides deeper insight into moisture sorption over a wide range of relative humidity (RH), from 9% to 98%, and its effect on the evolution of the tensile behaviour and performance of hemp/epoxy unidirectional biocomposites. Moisture sorption is associated with orthotropic hygroscopic expansion which is also related to the influence of fibre reinforcement distribution and the generation of residual stresses due to manufacturing. Tensile behaviour is significantly modified by moisture content, with a non-linear behaviour becoming more evidenced. The increase of moisture content causes exponential decay of tensile modulus, but a non-monotonic evolution of tensile strength and strain at break shows optimal properties at about 3%. The hygroscopic property evolution observed is responsible for the creation of compressive radial stresses at the fibre/matrix interface, which promotes load transfer and benefits the interface performance.
- Subjects :
- Materials science
Moisture
Sorption
Young's modulus
02 engineering and technology
Epoxy
010402 general chemistry
021001 nanoscience & nanotechnology
01 natural sciences
0104 chemical sciences
symbols.namesake
[SPI]Engineering Sciences [physics]
Mechanics of Materials
Residual stress
visual_art
Ultimate tensile strength
Ceramics and Composites
symbols
visual_art.visual_art_medium
Relative humidity
Composite material
0210 nano-technology
Water content
Subjects
Details
- Language :
- English
- ISSN :
- 1359835X
- Database :
- OpenAIRE
- Journal :
- Composites Part A: Applied Science and Manufacturing, Composites Part A: Applied Science and Manufacturing, Elsevier, 2019, 123, pp.278-285. ⟨10.1016/j.compositesa.2019.05.006⟩
- Accession number :
- edsair.doi.dedup.....d26a84edb5f6566cb165e4d00b3515a4