Design and Analysis of Composite Multilayered Shells

摘要

The principal objective of this investigation was to provide a reliable and efficient prototype software for the engineering design and analysis of multilayered composite shells, capable of modeling linear and nonlinear behavior in three dimensions. In addition, it should be capable of assessing the quality of the solution and providing feedback on the basis of which the solution quality can be improved. Its hierarchic structure should allow the selection of models of increasing complexity in an adaptive way, such that the goals of computation are satisfied within the required accuracy and with minimal effort. The project addressed the investigation of a hierarchic sequence of models for multilayered composite shells and their implementation within the framework of the p-version of the finite element method. In the Phase I project, we investigated the use of the hierarchic models for the analysis of bending of laminated (flat) plates. Phase II utilized the results of Phase I to fully assess the problems associated with bending/membrane coupling and curvature, and extend those results to the nonlinear (small- strain, large- deformation) solution methods for laminated shells, where the most significant technological contributions are to be realized.