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In this paper, an efficient approach is used to evaluate the stochastic variations of the bulk permittivity for complex periodic composite material. This method is based on the stochastic collation method together with a periodic 3-D finite-difference approach. Based on the proposed method, the influence of the input uncertainties (e.g., mixture inclusion permittivity, conductivity, volume fraction,...
In this paper, a GPU accelerated three-dimensional finite difference method is presented as an efficient approach of performing fast parallel simulations of composite materials. Using a NVIDIA GeForce 9800 series GPGPU and with an optimized CUDA implementation, a considerable speed-up (>20) was observed for simulations of large size problems. Further performance improvements could be achieved by...
The ability to design dielectric composite material exhibiting maximum loss at a specific frequency is of interest in telecommunications and radar absorption. In this paper, an optimization procedure based on genetic algorithm is presented for the design of composite material with maximum loss at multiple frequencies using multiphase and multilayer of spherical filler particles. This approach can...
In this paper, an optimization procedure is proposed to design the maximum loss for composite material at multiple frequencies using multiphase spherical particles. This approach is based on a genetic algorithm together with the Maxwell-Garnett formulas. Once initial designs are completed, more accurate finite-difference method will be used to evaluate the designs. This approach can also be used to...
This paper presents an efficient technique to evaluate the variations of electromagnetic properties for composite materials. This technique can significantly reduce the CPU time and yet maintain the accuracy of the stochastic analysis. This technique is extended along with stochastic collocation method and sparse grid method to investigate variations in the inclusion permittivity and conductivity...
This paper describes a methodology to extract effective electrical properties for periodic composite medium. The extraction algorithm is based on a periodic finite-difference time-domain (FDTD) method. The results are compared with conventional mixing theories and 3D Fourier series expansion methods. Two results show satisfactory agreement. With the extracted effective permittivity and conductivity,...
In this paper, the FDM is extended to analyze the effective anisotropic permittivity of composite materials with non-isotropic or biaxial anisotropic inclusions. Numerical experiments have demonstrated that this technique has the ability to effectively analyze three-dimensional complex composite materials with macroscopic anisotropic dielectric properties.
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