Accession Number : ADA301092

Title :   The Effect of Stress on the Fluorescence of Kevlar Fiber,

Corporate Author : CALIFORNIA UNIV LIVERMORE RADIATION LAB

Personal Author(s) : Richardson, J. H. ; Haugen, G. R. ; Penn, L. S. ; Feikert, J. H. ; Sherry, R. J.

PDF Url : ADA301092

Report Date : 18 OCT 1976

Pagination or Media Count : 19

Abstract : Kevlar, an aromatic polyamide fiber made by DuPont, is enjoying great popularity because of its excellent mechanical properties. This fiber finds many applications but is of particular use in Kevlar/epoxy composite materials and parts such as filament wound pressure vessels. Ultimately there is interest in predicting the lifetime of these pressure vessels under stress and assorted environmental conditions. Since the fiber has only been available for about five years, there is no long term performance data which has been experimentally determined under realistic field conditions. The lack of a predictive molecular model makes it difficult to directly correlate an experimental observation with an estimation of lifetime. An understanding, on a molecular level, of failure and of the changes associated with long term aging would greatly contribute to formulating an accurate and comprehensive model for predicting lifetime of the material. jg p.3

Descriptors :   *STRESSES, *FIBERS, *FLUORESCENCE, MECHANICAL PROPERTIES, FILAMENT WOUND CONSTRUCTION, MODELS, MOLECULAR STATES, COMPOSITE MATERIALS, OBSERVATION, POLYAMIDE PLASTICS, ESTIMATES, PRESSURE VESSELS, AROMATIC COMPOUNDS, EPOXY COMPOSITES, FIELD CONDITIONS.

Subject Categories : Laminates and Composite Materials
      Coatings, Colorants and Finishes
      Textiles
      Plastics
      Mechanics

Distribution Statement : APPROVED FOR PUBLIC RELEASE