Investigation of First Ply Failure in Graphite/Epoxy Laminates Subjected to Biaxial Static and Fatigue Loadings.

Abstract

Thin graphite/epoxy (0/90)s and (+ or - 45)s tubes were loaded in various combinations of tension, torsion, and internal pressure, and physical evidence of first ply failure (FPF) was found using replication techniques. The FPF envelopes so identified were compared with ultimate strength envelopes, and with lamination theory predictions using a maximum strain criterion. Preliminary experiments were performed to examine the consequences of fatigue cycling inside of, and across the FPF envelope. (Author)

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Document Details

Document Type
Technical Report
Publication Date
Jun 01, 1976
Accession Number
ADA040823

Entities

People

  • David E. Walrath
  • Donald N. Weed
  • Philip H. Francis

Organizations

  • Southwest Research Institute

Tags

Communities of Interest

  • Air Platforms
  • Sensors

DTIC Thesaurus Topics

  • Air Force
  • Composite Materials
  • Creep
  • Detection
  • Epoxy Laminates
  • Fabrication
  • Failure Mode And Effect Analysis
  • Fatigue Tests (Mechanics)
  • Internal Pressure
  • Laminates
  • Materials
  • Materials Laboratories
  • Materials Processing
  • Measurement
  • Mechanical Working
  • Mechanics
  • Thermal Expansion

Readers

  • Adaptive Control and Estimation with Uncertainty in Dynamic Systems.
  • Reinforced Composite Materials
  • Structural Dynamics.