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- W2991781708 abstract "The method of modifying the differential equations describing the diffusion and chemical reaction in solids for solution by the finite element (FE) method to simulate chemical aging in polymers is described. The purpose is to predict chemical aging process in solid polymers. Henry's law is applied to modify the mass balance equations to meet the requirement of an FE continuous solution variable at the material, and the resulting mass balance equations' analogy with the heat conduction equation is exploited to utilize existing FE coding. The FE architecture formulations for the solution vector, stiffness, and capacitance matrices for simple one-dimensional solid parametric elements are presented. The ability of the method to compute a numerical solution that preserves discontinuities in chemical species concentration at dissimilar material interfaces is described and illustrated. The method is extended to include temperature effects by coupling the heat conduction equation to the FE solution of the mass balance equations. An application is presented, the chemical aging of large assets. Aging data are presented in a comparison to model predictions. A single set of material properties and boundary conditions were found that fit the chemical profile data for the two assets of different ages." @default.
- W2991781708 created "2019-12-13" @default.
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- W2991781708 date "2002-04-22" @default.
- W2991781708 modified "2023-10-16" @default.
- W2991781708 title "Diffusion and Chemical Reaction by the Finite Element Method" @default.
- W2991781708 doi "https://doi.org/10.2514/6.2002-1682" @default.
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