Abstract
This paper presents a refined finite element shell model for the numerical analysis of thick or thin anisotropic laminated shells. A layered approach is adopted for solution with displacement variables assumed at each laminate interface. Elastic-plastic numerical analysis is performed based on flow theory and a Huber-Mises yielding surface extended by Hill for fully three-dimensional anisotropic materials. Numerical results obtained for both nonlaminated and laminated shells are presented and the effects of boundary constraints on the load-boundary deformation characteristics and on the spread of plastic zones are discussed. Comparisons are made to show the effects of anisotropy and bending-stretehing coupling on the elastic-plastic response. The effects of lamina angle sequences on the structural characteristics are also illustrated.
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