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Untersuchung des Einflusses der Geometrie auf die Wasserabsorption bei Verbundwerkstoffen durch Diffusionsmodelle
Author(s) -
da Silva W. P.,
e Silva C. M. D. P. S.,
Farias V. S. O.,
Lima A. G. B.
Publication year - 2011
Publication title -
materialwissenschaft und werkstofftechnik
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.285
H-Index - 38
eISSN - 1521-4052
pISSN - 0933-5137
DOI - 10.1002/mawe.201100800
Subject(s) - parallelepiped , thermal diffusivity , slab , diffusion , absorption (acoustics) , representation (politics) , inverse , thermodynamics , composite number , absorption of water , materials science , chemistry , geometry , mathematics , composite material , physics , geophysics , politics , political science , law
In this paper, the influence of the geometric representation of samples of a composite material on the description of its water absorption is studied. It is supposed that diffusion models with boundary condition of the first kind satisfactorily describe the absorption, and that the volume and effective mass diffusivity are constant during the process. The geometries used to represent the samples are: infinite slab, rectangular plate and parallelepiped. The effective mass diffusivity is determined by coupling of the analytical solution corresponding to the model to an optimizer based on the inverse method. For the dimensions of the samples, based on statistical indicators obtained in the simulation of each model, it can be concluded that the best geometric representation is the parallelepiped. However, if there is no interest about the moisture distribution within the sample and the only objective of the research is to describe the water absorption kinetics, the infinite slab can also be used.