Analysis of the manufacturing signature on AFP-manufactures variable stiffness composite panels
Alfonso Pagani, Alberto Racionero Sánchez-Majanodownload PDF
Abstract. Variable stiffness composites broaden the design space, in comparison with straight-fiber composites, to meet fixed mechanical performance. Nevertheless, the manufacturing of these advanced composites incurs into the presence of undesired fabrication defects such as gaps and overlaps, which alter the mechanical behavior of the laminated parts. In this work, the authors couple the Defect Layer Method, utilized to model defects, with the Carrera Unified Formulation in order to study how the manufacturing signature affects the fundamental frequency of variable stiffness laminates.
Variable Stiffness Composites, Automated Fiber Placement, Unified Formulation, Defect Modeling
Published online 11/1/2023, 4 pages
Copyright © 2023 by the author(s)
Published under license by Materials Research Forum LLC., Millersville PA, USA
Citation: Alfonso Pagani, Alberto Racionero Sánchez-Majano, Analysis of the manufacturing signature on AFP-manufactures variable stiffness composite panels, Materials Research Proceedings, Vol. 37, pp 317-320, 2023
The article was published as article 69 of the book Aeronautics and Astronautics
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 R. Olmedo, Z. Gürdal. Buckling response of laminates with spatially varying fiber orientations. In 34th Structures, Structural Dynamics and Materials Conferences (1993), 1567. https://doi.org/10.2514/6.1993-1567
 A. W. Blom, C. S. Lopes, P. J. Kromwijk, Z. Gürdal, P. P. Camanho. A theoretical model to study the influence of tow-drop areas on the stiffness and strength of variable-stiffness laminates. Journal of Composite Materials 43(5) (2009), 403-425. https://doi.org/10.1177/0021998308097675
 K. Fayazbakhsh, M. A. Nik, D. Pasini, L. Lessard. Defect layer method to capture effect of gaps and overlaps in variable stiffness laminates made by automated fiber placement. Composite Structure 97 (2013), 245-251. https://doi.org/10.1016/j.compstruct.2012.10.031
 E. Carrera, M. Cinefra, M. Petrolo, E. Zappino. Finite Element Analysis of Structures through Unified Formulation. Wiley & Sons, Hoboken, New Jersey. 2014.
 A. R. Sánchez-Majano, R. Azzara, A. Pagani, E. Carrera. Accurate stress analysis of variable angle tow shells by high-order equivalent-single-layer and layer-wise finite element models. Materials 14(21) (2021), 6486. https://doi.org/10.3390/ma14216486
 A. Pagani, M. Petrolo, A.R. Sánchez-Majano. Stochastic characterization of multiscale material uncertainties on the fibre-matrix interface stress state composite variable stiffness plates. International Journal of Engineering Science 183 (2023), 103787. https://doi.org/10.1016/j.ijengsci.2022.103787
 E. Carrera. Theories and finite elements for multi-layered, anisotropic, composite plates and shells. Archives of Computational Methods in Engineering 9(2) (2002), 87-140.
 H. Akhavan, P. Ribeiro. Natural modes of vibration of variable stiffness composite laminates with curvilinear fibers. Composite Structures 93(11) (2011), 3040-3047. https://doi.org/10.1016/j.compstruct.2011.04.027