Development of a Radio-Frequency Transparent Energy-Absorbing Structural Element.
Abstract
An experimental investigation has been conducted to develop highly efficient energy absorbing structural elements from radiofrequency transparent materials. The materials were evaluated using two types of energy absorption processes; the fragmenting tube and the crushing of honeycomb and foamed materials. Plastic reinforced glass fabric tubes, employed in the fragmenting tube process, yielded specific energies of 28,400 and 12,300 ft-lb/lb for fabric orientation in the longitudinal and hoop directions respectively. The crushing of nylon phenolic honeycomb yielded a value of specific energy of l4,400 ft-lb/lb for a 3/16 inch cell size, 9.0 lb/ft3 density, and with a usable stroke of 80% of initial length. Radio frequency transmission losses were well within acceptable limits for the specified 100 to 2000 megacycle frequency range investigated.
Document Details
- Document Type
- Technical Report
- Publication Date
- Jul 01, 1965
- Accession Number
- ADA307656
Entities
People
- Ronald H. Smith