Predictions Of Effective Physical Properties Of Multiphase Materials

Theoretical prediction of effective properties for multiphase material systems is very important not only to analysis and optimization of material performance, but also to new material designs. In this paper, the main point is the software research on the prediction of the effective physical properties of multiphase materials. With deeply understanding of the theory of random generation-growth algorithm for reproducing multiphase microstructures based on the geometrical and morphological information obtained from measurements and experimental estimations and lattice Boltzmann method for the corresponding governing equations, software have been developed for our research. This set of numerical method has been demonstrated effectiveness and robustness not only with various applications by comparing the predictions with existing experimental data but also by accounting for the effects due to component properties, component size, material anisotropy, multiphase interactions and internal morphology.There are 4 chapters in this thesis; each chapter is summarized as follows:In the first chapter, the development and application of theoretical methods and numerical methods at home and abroad is investigated, the applications and limitations of various methods have been pointed out, combined with the domestic and abroad research status of the prediction method for the effective properties of multiphase materials, clarifying the meaning and the content of the research topic.In Chapter two, based on the introduction of the random generation-growth algorithm for granular-reinforced materials and fiber-reinforced materials and lattice Boltzmann solver, indicated a detailed explanation of the software for these numerical methods.In Chapter three, various applications are provided to validate the feasibility, effectiveness and robustness of this methodology by comparing the predictions with existing experimental data, accounting for the effects due to component properties, component size, material anisotropy, multiphase interactions and internal morphology. In Chapter four, the research of this thesis is summarized. Combining the research in this paper, the reference for further study is put forward.