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In the second part of this work, the acousto–ultrasonics waveforms acquired during the tests described in part I are processed using wavelet-based techniques in order to extract parameters capable of monitoring the damage accumulation in the C/C test coupons. A 10 level decomposition using the...
This paper investigates the effect of tufting on the mechanical properties of non crimped fabric (NCF) composites. In-plane behaviour is examined under tension and compression in the axial (0/90) and shear (±45) directions. Cyclic experiments in the bias and axial directions combined with a...
In the present work, in situ polymerizations of sulfonated polyoxadiazole through a polycondensation reaction of A–A (hydrazine sulphate) and B–B (aromatic dicarboxylic acid) monomers with carbon nanotubes in poly(phosphoric acid) were performed. The structures of composites were...
Three different PAN based carbon fibres (Toray T600S, T700S and Tenax STS5631) were recycled from epoxy resin/carbon fibre composites using supercritical n -propanol. The recycled carbon fibres were characterised using single fibre tensile tests, SEM, XPS and micro-droplet test. The tensile...
The dynamic tensile properties of carbon fiber (CF) composite loaded in the matrix-dominant direction are experimentally determined. In this study, thermoplastic epoxy resin is used as a matrix of the CF composite. A dynamic tensile test is performed using a tension-type split Hopkinson bar...
It is the objective of this work to verify the validity of different approximations in the analysis of geometrically non-linear vibrations of open, cylindrical, laminated, fully clamped shells. Namely, it is intended to verify if membrane inertia and transverse shear deformation can be neglected...
Hollow glass microsphere (HGM)–filled epoxy composites, with filler content ranging from 0 to 51.3 vol.%, were prepared in order to modify the dielectric properties of the epoxy. The results showed that the dielectric constant ( D k ) and dielectric loss ( D f ) of the composites decreased...
A novel image analysis procedure named Fourier transform misalignment analysis (FTMA) for measuring fibre misalignment in unidirectional fibre composites is presented. Existing methods are briefly illustrated and evaluated. The FTMA-method is presented, describing the specimen preparation and...
The viscoelastic/rate-sensitive plastic constitutive law to describe the nonlinear, anisotropic/asymmetric and time/rate-dependent mechanical behavior of fiber-reinforced (sheet) composites was developed under the plane stress condition. In addition to the theoretical aspect of the developed...
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