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York, C.B. (2013)
Publisher: Elsevier
Languages: English
Types: Article
Subjects: T1
Stacking sequence configurations for hygro-thermally curvature-stable (HTCS) laminates have recently been identified in nine unique classes of coupled laminate with standard ply angle orientations +45, −45, 0 and 90°. All arise from the judicious re-alignment of the principal material axis of laminate classes with Bending-Twisting and/or Bending-Extension and Twisting-Shearing coupling; where off-axis material alignment of these parent classes gives rise to distinctly different mechanical coupling behaviour. However, for standard ply angle orientations, HTCS solutions were found in only 8-, 12-, 16- and 20-ply laminates. \ud This article considers non-standard ply angle orientations +60, −60, 0 and 90°, which lead to solutions in all ply number groupings for 10 plies and above, thus offering a possibility for ply terminations and hence tapered HTCS laminate designs.
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    • [1] C. B. York “Unified approach to the characterization of coupled composite laminates: Benchmark configurations and special Cases”. Journal of Aerospace Engineering, ASCE, Vol. 23, No. 4, pp. 219-42, 2010.
    • [2] C. B. York “Unified approach to the characterization of coupled composite laminates: Hygro-thermally curvature-stable configurations”. International Journal of Structural Integrity, Vol. 2, No. 4, pp. 406-36, 2011.
    • [3] S. J. Winckler “Hygrothermally curvature stable laminates with tension-torsion coupling”. Journal of the American Helicopter Society, Vol. 31, pp. 56-58, 1985
    • [4] H. P. Chen “Study of hygrothermal isotropic layup and hygrothermal curvaturestable coupling composite laminates”. Proc. 44th AIAA/ASME/ ASCE/AHS/ASC Structures, Structural Dynamics, and Materials Conf., AIAA-2003-1506, 2003.
    • [5] R. J. Cross, R. A. Haynes and E. A. Armanios “Families of hygrothermally stable asymmetric laminated composites”, Journal of Composite Materials, Vol. 42, pp. 697-716, 2008.
    • [6] R. Haynes and E. Armanios “Hygrothermally stable extension-twist coupled laminates with bending-twist couplined Laminates”. Proc. American Helicopter Society 67th Annual Forum, Virginia, USA, 2011.
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