Journal: Composite Structures

Abbreviation

Compos. struct.

Publisher

Elsevier

Journal Volumes

ISSN

0263-8223
1879-1085

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Publications 1 - 10 of 68
  • Wing twisting by elastic instability: A purely passive approach
    Item type: Journal Article
    Runkel, Falk; Fasel, Urban; Molinari, Giulio; et al. (2018)
    Composite Structures
  • Investigation of failure initiation in curved composite laminates using a higher-order beam model
    Item type: Journal Article
    Thurnherr, Claudia; Groh, Rainer M.J.; Ermanni, Paolo; et al. (2017)
    Composite Structures
  • Effect of saw-tooth ply drops on the mechanical performance of tapered composite laminates
    Item type: Journal Article
    Woigk, Wilhelm; Zhang, Bing; Jones, Mike I.; et al. (2021)
    Composite Structures
    Automated Fibre Placement (AFP) is a manufacturing technique to produce large, high quality composite parts, where preimpregnated carbon fibre tapes are laid side-by-side to generate the composite preform. Thickness changes within a component are realised through internal ply terminations, with the tapes being cut perpendicular to the fibre direction. In plies laid up at an angle to the taper direction, the AFP tape cuts create saw-tooth shaped ply drop tips. This increases the size of resin rich zones and enlarges the region where stress concentrations and cracks can develop, which amplifies the risk of failure. This study investigates the effect of simulated AFP saw-tooth ply drop tips, created by hand layup, on the mechanical properties and failure behaviour of carbon fibre/epoxy composites and compares its results to reference broad goods layups. The stiffness was found to be unaffected and the strength was reduced by similar to 10%. The failure mode was governed by delamination for the saw-tooth ply drop tips, whereas the reference specimens failed by rupture of the unidirectional fibres. A finite element modelling technique was used to select the layup to be tested. The models were then refined in the light of experimental results, to accurately predict the failure and explain the failure mode transition.
  • The Onsert
    Item type: Conference Paper
    Kress, G.; Naeff, P.; Niedermeier, M.; et al. (2006)
    Composite Structures
  • Stiffness analysis of corrugated laminates under large deformation
    Item type: Journal Article
    Thurnherr, Claudia; Ruppen, Lukas; Brändli, Simon; et al. (2016)
    Composite Structures
  • Mode I, II and Mixed Mode I/II delamination growth in composites
    Item type: Journal Article
    Jones, R.; Stelzer, S.; Brunner, A. J. (2014)
    Composite Structures
  • Frequency domain finite element estimates of viscoelastic stiffness of unidirectional composites
    Item type: Journal Article
    Gusev, Andrei A.; Kern, Leyla S. (2018)
    Composite Structures
  • Combined experimental–numerical approach for through-thickness unsaturated permeability characterization of deformable fiber-beds
    Item type: Journal Article
    Kabachi, Mohammed Ayyoub; Sandberg, Michael; Ermanni, Paolo (2025)
    Composite Structures
    Successful implementation of Liquid Composite Molding processes relies on a thorough knowledge of the flow and fiber-bed behavior, with unsaturated permeability being a key parameter. This paper presents a combined experimental–numerical method for the characterization of unsaturated through-thickness permeability of deformable engineering textiles. The experimental procedure, developed in a previous study, is based on visual tracking, and recording of flow-front advancement and eventual flow-induced fiber-bed deformation. This information, along with material and injection parameters, is fed to a numerical dual-scale flow model implemented using a finite volume scheme. The model considers different aspects of the impregnation, namely macro and micro flows between and inside fiber bundles, capillary flow, and fiber-bed deformation. The macro and micro permeability curves are obtained through an inverse method that considers different experimental parameters. The method is successfully applied on a glass fiber Non-Crimped-Fabric, where permeability results satisfy all the employed processing and material conditions.
  • A procedure for the simulation of failure in thermoplastic composites
    Item type: Journal Article
    Fritzsche, Peter; Weder, Mario; Wyss, Iwan; et al. (2008)
    Composite Structures
  • An efficient two-dimensional shear-lag model for the analysis of patched laminates
    Item type: Journal Article
    Kussmaul, Ralph; Zogg, Markus; Ermanni, Paolo (2018)
    Composite Structures
Publications 1 - 10 of 68