Obtaining of specified effective mechanical, thermal, and electrical characteristics of composite filled with dispersive materials

Resumo

Properties of polymer matrices compositions can be governed in a variety of ways. The structural modification is one of the most commonly encountered methods, where different effective characteristics of the material are varied by means of reinforcing inclusions, while the chemical nature of the matrix and inclusions is not changed. We propose an approach to determination of governing parameters (phase composition, phase properties, internal geometry, interphase interaction character) providing specified effective properties to the material or getting them into predetermined intervals. In line with this approach, on the basis of solution of a limited number of direct problems (modeling tasks) that define effective characteristics by values of governing parameters, the corresponding response surfaces of electrical, thermal, and deformation-strength properties to the values of the governing parameters are constructed in the state space. Surface analysis allows us to determine whether there is a solution for the selected range of the specified effective characteristics and, if there is one, to specify the range of values of governing parameters. If necessary to ensure simultaneous receipt for the material of both effective thermal and electrical properties and deformation-strength properties, the values of governing parameters are found by the intersection of the relevant areas. The proposed method can obviously be extended to multiphase materials.