Multiscale Phenomena in Bruggeman Composites

Multiscale Phenomena in Bruggeman Composites

Mechanical, magnetic, and transport properties of arbitrary inhomogeneous composites are investigated by a Bruggeman-type mean-field approach. The theory yields materials parameters as functions of the volume fractions, geometries, and materials constants of the phases. Each system is described by a single response parameter g, which is equal to the percolation threshold of the composite. For m...

Blood flow multiscale phenomena.

The cardiovascular disease is one of most frequent cause deaths in modern society. The objective of this work is analyse the effect of dynamic vascular geometry (curvature, torsion, bifurcation) and pulsatile blood nature on secondary flow, wall shear stress and platelet deposition. The problem was examined as multi-scale physical phenomena using perturbation analysis and numerical modelling. T...

Computational Simulation of Ablation Phenomena in Glass-filled Phenolic Composites

A one–dimensional, transient and thermal degradation model for predicting responses of composite materials when are exposed to the fire is presented. The presented model simulates ablation of composites with different layers of materials and considers material properties as functions of temperature. The reactions are modeled by using Arrhenius-type parameters and density-temperature diagram...

Analysis of Multiscale Phenomena in Heterogeneous Materials

A new variational methodology is developed for computing optimal bounds on the stress inside thermoelastic composites. The method also provides tight bounds on the strength domains for random two-phase elastic-plastic composites. A second effort develops a global local finite element method for problems with multiple length scales such as functionally graded thermal barrier coatings. The method...

Photoelectric phenomena in polymer-based composites