Engineering Transactions, 62, 2, pp. 109-130, 2014

Geometrically Nonlinear Analysis of Functionally Graded Shells Based on 2-D Cosserat Constitutive Model

Karol DASZKIEWICZ
Politechnika Gdańska Wydział Inżynierii Lądowej i Środowiska Katedra Mechaniki Budowli i Mostów
Poland

Jacek CHRÓŚCIELEWSKI
Politechnika Gdańska Wydział Inżynierii Lądowej i Środowiska Katedra Mechaniki Budowli i Mostów
Poland

Wojciech WITKOWSKI
Politechnika Gdańska Wydział Inżynierii Lądowej i Środowiska Katedra Mechaniki Budowli i Mostów
Poland

In this paper geometrically nonlinear analysis of functionally graded shells in 6-parameter shell theory is presented. It is assumed that the shell consists of two constituents: ceramic and metal. The mechanical properties are graded through the thickness and are described by power law distribution. Formulation based on 2-D Cosserat constitutive model is used to derive constitutive relation for functionally graded shells. Numerical results for typical benchmark geometries of smooth and irregular FGM shells under mechanical loading are presented. The influence of power-law exponent and micropolar material constants on the overall behaviour of functionally graded shells is investigated.
Keywords: functionally graded shells, nonlinear six-parameter shell theory, Cosserat constitutive equations, micropolar constants, large deflection.
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