The Effect of Environment on the Mechanical Behavior of Kevlar/Epoxy Materials

Abstract

Applicability of a viscoelastic characterization to Kevlar 49/5208 material under severe environment was investigated. Specific studies include development of properties reflecting material dependence on time, temperature and humidity and resolution of the question as to whether a specific thermal conditioning environment can be directly substituted for a specific moisture conditioning environment over a prescribed temperature vs. humidity range. Specimens with 0 deg, 90 deg and + or - 45 deg layup were used for creep- recovery tests in various environments. Test data were analyzed by using a viscoelasticity theory and power law representation of the creep compliance. Stress dependence of the material is emphasized to account for non-linearity.

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Document Details

Document Type
Technical Report
Publication Date
Mar 01, 1982
Accession Number
ADA115292

Entities

People

  • Tak‐San Ho

Organizations

  • Vought

Tags

Communities of Interest

  • C4I
  • Energy and Power Technologies
  • Sensors
  • Space
  • Weapons Technologies

DTIC Thesaurus Topics

  • Airframes
  • Body Weight
  • Composite Materials
  • Epoxy Composites
  • Information Processing
  • Material Degradation Processes
  • Materials
  • Materials Laboratories
  • Materials Processing
  • Materials Science
  • Materials Testing
  • Mechanical Properties
  • Mechanics
  • Military Research
  • Stresses
  • Structural Components
  • Tensile Strength

Readers

  • Aerospace Test and Evaluation
  • Reinforced Composite Materials
  • Theoretical Analysis.