A New 3-D Numerical Semi-analytical Algorithm for Multiply Composite Structures with Varied Thickness
Sun Qin
(Northwestern Polytechnical University, Xi'an 710072, P.R.C)

Abstract:  Based on stratified theoretical methodology of composite laminates, a new 3-D numerical semi-analytical algorithm for multiply composite structures has been established, which constructs its displacement functions through the combination of spline function, functional series and numerical interpolation. This present algorithm overcomes dependenceon the selection of analytical functions for different loading conditions in normal semi-analytical methods, and no special assumptions are needed for varied-thickness structural region of composite laminates. Compared with ordinary finite element method, this method has taken noticeable advantages and much better improvement on data-preparation, numerical accuracy, convergence and stability, which are shown by some numerical examples.
Keywords: new 3-D semi-analytical algorithm, multi-ply composite structures, varied-thickness.