Approximations for warp free laminate configurations

Weaver, P.M., O’Donnell, M.P. and York, C.B. (2010) Approximations for warp free laminate configurations. In: 51st AIAA/ASME/ASCE/AHS/ASC Structures, Structural Dynamics, and Materials Conference, Orlando FL, USA, 12-15 Apr 2010, (doi: 10.2514/6.2010-2774)

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The relationship between laminates exhibiting thermal warping characteristics and the required strain in flattening a warped plate is described. Upper limits on these strains are proposed and subsequently used to define the boundaries of a feasible region from which coupled laminates approximating a warp free condition may be safely chosen. The study also characterizes the growth of this feasible region as a function of the allowable strain for laminates with standard ply angles (±45, 0 and 90 degrees), for all possible layups with up to 10 plies. The results show that symmetric configurations significantly reduce design freedom, particularly as the number of plies increase. A simple, yet intuitive, design approach incorporating non-symmetric subsequences is therefore developed.

Item Type:Conference Proceedings
Glasgow Author(s) Enlighten ID:York, Dr Christopher
Authors: Weaver, P.M., O’Donnell, M.P., and York, C.B.
College/School:University Centres > Glasgow Materials Research Initiative

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