Abstract
Metal materials are gradually replaced by fiber reinforced composite and the electromagnetic shielding capacity needs to be quantitatively evaluated, especially for intense electromagnetic pulse. Equivalent permittivity and permeability of fiber composite are calculated by multi-scale model based on finite element method, which results are close to theoretical values. Transverse electrical conductivity is obtained by contact network model and numerical results are in agreement with experimental data. The propagation characteristics of high altitude electromagnetic pulse penetration through fiber reinforced composite is investigated by numerical method based on electromagnetic wave theory in time domain. It is found that fiber orientation and stacking sequence can affect the shielding capacity of fiber composite. Composite laminates stacked alternately at 45 degrees satisfy the shielding requirement when high altitude electromagnetic pulse incidence at any angle. Nickel-coated carbon fiber composite laminate show better shielding than that of carbon fiber composite laminate.
| Original language | English |
|---|---|
| Article number | 111307 |
| Journal | Composite Structures |
| Volume | 226 |
| DOIs | |
| State | Published - 15 Oct 2019 |
Keywords
- Carbon fibers
- Electrical properties
- Micro-structures
- Numerical analysis