Accession Number : ADD012918

Title :   Damage Assessment System for Composite Plastic Structures Using Fiber Optics.

Descriptive Note : Patent,

Corporate Author : DEPARTMENT OF THE NAVY WASHINGTON DC

Personal Author(s) : Crane,Roger M ; Macander,Aleksander B

Report Date : 08 Apr 1986

Pagination or Media Count : 4

Abstract : This patent discusses a damage assessment system consisting of a three-dimensional grid of optical fibers for locating and assessing damage in plastic composite structures. A optical fiber grid system is implanted in a composite structure during its fabrication and becomes integrated with it. The optical fiber grid experiences an identical load/damage condition as the structure itself. Using a system of interrogation based on optoelectronics, passage or continuity of light throughout the system can be monitored for light attenuation or interruption. Highly stressed fibers would attenuate light while broken fibers would interrupt or hinder light transmission. By monitoring a number of optical fiber ends, the extent of damage in three dimensions can be determined.

Descriptors :   *PATENTS, *COMPOSITE STRUCTURES, *FIBER OPTICS, *REINFORCED PLASTICS, *FIBER REINFORCED COMPOSITES, *DAMAGE ASSESSMENT, ATTENUATION, COMPOSITE MATERIALS, CONTINUITY, ELECTROOPTICS, FIBERS, GRIDS, LIGHT, PLASTICS, STRESSES, THREE DIMENSIONAL, IMPLANTATION

Subject Categories : Plastics
      Fiber Optics and Integrated Optics

Distribution Statement : APPROVED FOR PUBLIC RELEASE