Extension-twist coupled laminates for aero-elastic compliant blade design

York, C.B. (2012) Extension-twist coupled laminates for aero-elastic compliant blade design. In: 53rd AIAA/ASME/ASCE/AHS/ASC Structures, Structural Dynamics and Materials Conference, Honolulu, Hawaii, 23-26 Apr 2012, pp. 1-22. (doi: 10.2514/6.2012-1457)

Abstract

A definite list of laminate configurations with extension-twisting (and shearing-bending) coupling is derived for up to 21 plies of identical thickness. The list comprises individual stacking sequences, containing standard angle-ply and cross-ply sub-sequences; combinations which are contrary to the previously assumed form for this class of laminate. The list also contains dimensionless parameters from which the extensional, coupling and bending stiffness terms are readily calculated for any fiber/matrix system. Lamination parameters are shown graphically to illustrate the extent of the design space with up to 21 plies. A special sub-group from this class of coupled laminate is identified that can be manufactured flat under a standard elevated temperature curing process; this sub-group possesses hygro-thermally curvature-stable behavior. Finally, bounds on the compression buckling strength are assessed using a closed form solution for all the laminate groups presented.

• Item Type: Conference Proceedings
• Keywords: Coupled Laminates, Lamination Parameter Design Space, Extension-Twisting, Hygro-Thermally Curvature-Stable Lamination Parameters, Quasi-Homogeneous, Shearing-Bending, Angle-Ply Laminates, Standard-Ply Laminates.
• Status: Published
• Refereed: Yes
• Glasgow Author(s) Enlighten ID: York, Dr Christopher
• Authors: York, C.B.
• Subjects: T Technology > T Technology (General)
• College/School: College of Science and Engineering > School of Engineering
• Copyright Holders: Copyright © 2012 The Author
• Publisher Policy: Reproduced with the permission of the Author

Project Code	Award No	Project Name	Principal Investigator	Funder's Name	Funder Ref	Lead Dept
66253		53rd AIAA/ASME/ASCE/AHS/ASC Structures, Structural Dynamics and Materials Conference in Hawaii, USA	C. B. York	Royal Aeronautical Society	UNSPECIFIED