Abstract
Attributing to its unique dual cover systems, the numerical manifold method (NMM) provides a uniform framework for both continuous and discontinuous analysis. In this work, the NMM is developed to perform 2D transient moisture diffusion analysis in functionally graded materials (FGMs). The NMM discrete formulations are derived based on the governing equation, the boundary conditions and the modified variational principle, and then solved by the backward difference scheme. The accuracy of the proposed method is verified through a typical numerical example, and the influence of the material gradient of the FGMs on the moisture concentration field is also examined.
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