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Effective thermal conductivity of porous building materials is a very important parameter particularly in the thermal performance analysis of building envelopes. There are many different analytical models to estimate or calculate effective thermal conductivity of N–phase porous media partially or fully filled with air and/or water. In this paper the selected models of effective thermal conductivity for 2 and 3–phase porous material are selected and reviewed.
The possibilities of application in building of the rail vehicles surface elements with the porous structure are presented. The results of the strength analysis of the fragment of coaches roof with the porous engineering material model are discussed.
The method and experimental results of investigations of shaped charge liner reduction during early stage of collapse are presented in this paper. The liners made of sintered copper with porosity of 6, 8, 10 and 15% were examined. The tests for two variants of loading pressure were carried out. From the research it follows that during early phase of liners collapse, the decay of pores does not occur. Verification of experimental results, on the basis of theoretical model of compression of porous material, was made.
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