Journal: Composites Part A: Applied Science and Manufacturing

Abbreviation

Compos., Part A Appl. Sci. Manuf.

Publisher

Elsevier

Journal Volumes

ISSN

1359-835X
1878-5840

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Publications1 - 10 of 34
  • Carbon fibre reinforced composite waste
    Item type: Journal Article
    Witik, Robert A.; Teuscher, Remy; Michaud, Véronique; et al. (2013)
    Composites Part A: Applied Science and Manufacturing
  • Rationally designed conductive wood with mechanoresponsive electrical resistance
    Item type: Journal Article
    Mastantuoni, Gabriella G.; Tran, Van Chinh; Gaermark, Jonas; et al. (2024)
    Composites Part A: Applied Science and Manufacturing
    Porous cellular foams, combining lightweight, high strength, and compressibility, hold great promise in a wide range of advanced applications. Here, the native structure of pine wood was modified by in-situ lignin sulfonation and unidirectional freezing, resulting in an alveolate structure inside the wood cell wall with arrays of sub-100 nm channels. The obtained wood foam exhibited highly enhanced permeability while retaining the native cellular arrangement and high lignin and hemicellulose content. Such engineered cellular foam contributed to superior mechanical performance with compressive strength of 9 MPa and Young's modulus of 344 MPa in the longitudinal direction. The high porosity allowed homogeneous infiltration of conductive polymer PEDOT:PSS inside the wood cell wall. The resulting composite exhibited high conductivity, sponge-like compressibility and the ability to modulate electrical resistance in a reversible manner in the radial direction. This rationally designed conductive wood demonstrated potential in durable and ultrasensitive pressure-responsive devices and strain sensors.
  • High strain sustaining, nitrile rubber based, large-area, superhydrophobic, nanostructured composite coatings
    Item type: Journal Article
    Schutzius, Thomas M.; Tiwari, Manish K.; Bayer, Ilker S.; et al. (2011)
    Composites Part A: Applied Science and Manufacturing
  • Out-of-plane permeability measurement for reinforcement textiles: A benchmark exercise
    Item type: Journal Article
    Yong, A.X.H.; Aktas, A.; May, D.; et al. (2021)
    Composites Part A: Applied Science and Manufacturing
    The out-of-plane permeability of two glass fibre fabrics was measured by 26 institutions using silicone oil as a test fluid. Participants in this study were free to select the test procedure, specimen dimensions and data analysis method, provided that testing was carried out at three target fibre volume fractions, 46 %, 50 % and 54 %. While results showed a variability of two orders of magnitude between participants, most values were within a significantly narrower band. A majority of participants used 1D saturated test method. A few selected 1D unsaturated and 3D unsaturated flow method which gave very similar results. Focusing on analysis of data and results of 1D saturated flow measurements, results are not conclusive, but they are consistent with number of layers in a specimen, fibre volume fraction, injection pressure and sealing of specimen edges all having an effect on the measured permeability. Specifying limits for these parameters is expected to result in reduced scatter in measured permeability.
  • Simultaneous binding and ex situ toughening concept for textile reinforced pCBT composites
    Item type: Journal Article
    Wu, Wangqing; Klunker, Florian; Xie, Lei; et al. (2013)
    Composites Part A: Applied Science and Manufacturing
  • Resolving discrepancies in wood micromechanics: Strain-mapped compression of tracheid wall micropillars
    Item type: Journal Article
    Amando de Barros, Júlio O.; Schwiedrzik, Jakob; Wittel, Falk K. (2025)
    Composites Part A: Applied Science and Manufacturing
    Wood’s increasing role as a structural resource in sustainable materials selection demands accurate characterization of its mechanical behavior. Its performance arises from a hierarchical structure, where the dominant load-bearing component is the S2 layer of tracheid cell walls—a thick, fiber-reinforced composite of cellulose microfibrils embedded in hemicelluloses and lignin. Due to the small dimensions and anisotropic nature of the S2 layer, mechanical testing presents significant challenges, particularly in producing uniform stress and strain fields. In this study, we apply micropillar compression (MPC) combined with digital image correlation (DIC) to Norway spruce tracheids, enabling direct and model-free strain measurements at the cell wall scale. Micropillars were oriented at different microfibril angles (MFAs), confirming the expected dependence of stiffness and yield stress on ultrastructural alignment, with higher stiffness and yield stress at low MFAs. For these under compression fibril-aligned kink bands occurred, while shear related failure was observed at higher angles. A parameter study on the acceleration voltage of the Scanning Electron Microscope revealed that electron beam exposure significantly degrades pillar integrity, which could explain data scatter and mechanical underestimation in earlier MPC studies. By controlling imaging protocols and using DIC-based strain measurements, we report the highest direct measurements of wood cell wall stiffness to date – up to 42 GPa for MFA = 0° – closer matching micromechanical model predictions compared to previous results. Findings are compared with Finite Element Method-based displacement corrections to establish a robust protocol for probing soft, anisotropic biological composites’ mechanical behavior while clarifying longstanding inconsistencies in reported results of wood MPC measurements.
  • Mechanical characterisation of GF-PET composite manufactured via in-situ Solid-State Polymerisation route
    Item type: Journal Article
    Vetterli, Oliver; Krüger, R.; Hentzen, S.; et al. (2025)
    Composites Part A: Applied Science and Manufacturing
    The work reported in this short communication focusses on the impact of solid-state polymerisation (SSP) of glass fibre-poly(ethylene terephthalate) (GF-PET) composites, on polymer's, interface's, and eventually composite's performance, characterised through transverse tensile testing. Comparison with a state-of-the-art film stacking process revealed that similar, but also improved mechanical performance can be achieved by composites produced via the in-situ (i.e., at composite lamina level) SSP method. When the polymer is reacted at long intervals to achieve high molecular weights in-situ, a robust fibre-matrix interface is apparently formed, yielding fully cohesive failure of the composite (on fully desized fibres), while the improved polymer's ductility enhances further the transverse performance. Composite's ultimate transverse tensile strength saturation was found at a PET intrinsic viscosity of 0.82 dL/g, with values of ∼60 MPa, and ultimate strain of ∼0.82%, with the latter to show a slight increase when the intrinsic viscosity reached 0.95 dL/g, through even-longer SSP times. Thus, the prevalent challenges in thermoplastic reinforced composites, namely high processing viscosity and a weak fibre-matrix interface, are effectively addressed by the developed in-situ SSP route.
  • Hybrid Bicomponent Fibres for Thermoplastic Composite Preforms
    Item type: Journal Article
    Schneeberger, Christoph; Wong, Joanna C.H.; Ermanni, Paolo (2017)
    Composites Part A: Applied Science and Manufacturing
  • In-nozzle impregnation of continuous textile flax fiber/polyamide 6 composite during FFF process
    Item type: Journal Article
    Terekhina, Svetlana; Egorov, Sergei; Tarasova, Tatiana; et al. (2022)
    Composites Part A: Applied Science and Manufacturing
    A simple and customized method is adapted to print the continuous bleached textile flax yarn/polyamide 6 composites by Fused Filament Fabrication. It is allowed to print successfully composite in one shot thanks to in-situ fiber impregnation inside the print head. Three filling patterns (0°, 90° and ± 45°) strategies relative to the tensile loading were adopted to investigate Young Modulus and tensile strength. The best mechanical properties were obtained for the unidirectional composite, where void content and inter-layer delamination decreased with increasing volume fiber fraction. However, the transversal tensile properties remained at their weakest point. Competitive specific elastic properties compared to those of continuous glass fiber/PA printed composites, given by the literature review, were obtained with the potential to compete the latter in infrastructure, automotive industry, and consumer applications. This is possible if only composite void content is decreased, and its yarn/matrix adhesion is improved.
  • Densified delignified wood as bio-based fiber reinforcement for stiffness increase of timber structures
    Item type: Journal Article
    Koch, Sophie; Grönquist, Philippe; Monney, Cyril; et al. (2022)
    Composites Part A: Applied Science and Manufacturing
    Carbon fiber reinforcements are applied in timber engineering thanks to their high strength, but their fossil origin compromises sustainability. Furthermore, applications for which an increase of stiffness is beneficial, such as in slab-type elements, still remain unexploited. Here, we reinforced beech wood with an emerging bio-based fiber type, densified delignified wood (DDW). We comparatively adhered DDW, flax, and carbon fibers to wood using a polyurethane adhesive. The specimens’ stiffness was tested before and after reinforcement using bending tests, and tensile tests of the isolated fiber composites were performed for modeling purposes. Whereas no beneficial effect was reported for flax fibers, DDW and carbon fibers were able to provide a stiffness increase of up to 10.5% and 16.7%, respectively, demonstrating the potential of DDW. On this basis, a design case study conducted for a timber–concrete composite slab showed that a DDW stiffness reinforcement can be a material saving alternative.
Publications1 - 10 of 34