Polymer matrix composites as broadband radar absorbing structures for stealth aircrafts

Design of Broadband Radar Absorbing Materials Using Particle Swarm Optimization

The design of planar multi-layer coatings with high absorption for a desired frequency and angle range is presented. The design technique is based on Particle swarm optimization (PSO). PSO is an evolutionary optimization algorithm based on the bird fly. Several design cases are presented. Numerical results that are compared with the existing in the literature show the advantages of this approac...

Manufacturing of Polymer-matrix Composites

Simple Method for the Preparation of Fe3O4/MWCNT Nanohybrid as Radar Absorbing Material (RAM)

We have successfully prepared Fe3O4/MWCNT nanohybrid with a very simple and economical method. Multi-Walled Carbon NanoTubes (MWCNT) encapsulated with Fe3O4 nanoparticles were synthesized via pyrolyzing of ferrocene. The sample was characterized with XRD, TEM and Vibrating Sample Magnetometer (VSM). Also, Permeability (µ) and Permittivity (ε) were...

Metal- and Polymer-Matrix Composites: Functional Lightweight Materials for High-Performance Structures

The special topic ‘‘Metaland Polymer-Matrix Composites’’ is intended to capture the state of the art in the research and practice of functional composites. The current set of articles related to metal-matrix composites includes reviews on functionalities such as self-healing, self-lubricating, and selfcleaning capabilities; research results on a variety of aluminum-matrix composites; and invest...

A micromechanics approach for damage modeling of polymer matrix composites

A new model for damage evolution in polymer matrix composites is presented. The model is based on a combination of two constituent-level models an9 an interphase model. This approach reduces the number of empirical parameters ·since the two constituent level models are formulated for isotropic materials, namely fiber and matrix. Decomposition of the state variables down to the micro-scale is ac...