Cyclic hygrothermal ageing of flax fibers' bundles and unidirectional flax/epoxy composite. Are bio-based reinforced composites so sensitive?

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The stiffness respectively increases by 22% and 32% under maximum stresses levels of 180 MPa (55% of ultimate tensile stress) and 155 MPa (45% of ultimate tensile stress). This

Fig.2 Relative modulus evolution as a function of ageing time for polyester resin, glass and flax-fibre composites (untreated and silane treated flax fibre) immersed in water

(a) Illustration of the dispersion states of fibre bundles within the epoxy matrix before and after the chemical treatments and thermo-compression processes; and SEM micrographs

Figure 7: Typical curves of axial mean strain, and dynamic elastic modulus recorded during fatigue tests as a function of normalized number of cycles, for different

But, most of the time, in order to substitute glass fibers by natural fibers in structural composites, a traditional curing and post-curing at high temperature,

adopts the null cop- ula analysis in order to preserve the topological fields in German when the copula is omitted in declaratives while Bender (2001) cannot account for long

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