Investigation of Fatigue Strength of Multilayer Advanced Fiber Composites.

Abstract

The analytical characterization of a multilayer fiber composite plate (without hole) was accomplished for both static and dynamic loading conditions using the finite difference technique. Thornel 300/5208 composites with and without holes were subjected to static and tensile fatigue testing. Five fiber orientations were submitted to test. Tensile fatigue testing also included three loading conditions and two frequencies. The low-cycle test specimens demonstrated a shorter tensile fatigue life than the high-cycle test specimens. Failure surfaces demonstrated effect of testing conditions. Secondary failure mechanisms, such as: delamination, fiber breakage, and edge fiber delamination were present in (01/+ or -45/0) sub s and (0/+ or -60/0) sub s specimens. Longitudinal delamination between plies also occurred in these specimens. (MM)

Open PDF

Document Details

Document Type
Technical Report
Publication Date
Sep 01, 1974
Accession Number
ADA303726

Entities

People

  • H. R. Thornton
  • T. J. Kozik

Organizations

  • Texas A&M University

Tags

Communities of Interest

  • Energy and Power Technologies

DTIC Thesaurus Topics

  • Composite Materials
  • Epoxy Composites
  • Failure Mode And Effect Analysis
  • Fracture (Mechanics)
  • Graphite Epoxy Composites
  • Graphitic Materials
  • Jet Propulsion
  • Materials Laboratories
  • Materials Processing
  • Materials Science
  • Materials Testing
  • Mechanical Engineering
  • Mechanical Properties
  • Mechanical Working
  • Mechanics
  • Stress Strain Relations
  • Tensile Strength

Readers

  • Structural Health Monitoring of Composite Structures.