Prediction of porous materials mechanical properties is crucial for their industrial applications. Now numerical models containing some errors or analytical semi-empirical models are used. Percolation theory model is suitable to describe porosity dependence of Young‘s and shear modulus and Poisson‘s ratio over whole porosity range as it includes critical porosity. Moreover, it is able to explain Poisson‘s ratio porosity independence as well its decrease with increased porosity (see Fig).
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Jaroslav Kováčik (2008) studied this question.
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