Data Acquisition and Control for Multiple Composite Life Tests

Abstract

Strength durability of composite materials has many current Navy applications including rocket motor cases, pressure vessel for submarine flasks, energy storage for space applications and for pilot ejection seats. The primary effect of composite aging can be characterized by the fiber filament life under constant stress (stress rupture). This thesis develops experimental facilities for parallel testing of fiber filaments in the form of a bundle. A fast data acquisition system records the filaments breakage during load application. The filaments within a bundle sample are maintained at a constant strain level which is automatically adjusted for creep by digital feedback signal from the load of a control sample. A slow speed data acquisition system records filament breakage during long elapse time (days to years). This thesis establishes a nationally unique capability at the Naval Postgraduate School to quantitatively characterize the reliability of composite material. Keywords: Stress rupture, Bundle testing.

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Document Details

Document Type
Technical Report
Publication Date
Jun 01, 1988
Accession Number
ADA198395

Entities

People

  • James W. Emery Jr

Organizations

  • Naval Postgraduate School

Tags

Communities of Interest

  • Ground and Sea Platforms
  • Weapons Technologies

DTIC Thesaurus Topics

  • Aeronautical Engineering
  • Composite Materials
  • Control Systems
  • Data Acquisition
  • Distribution Functions
  • Energy Storage
  • Engineering
  • Failure Mode And Effect Analysis
  • Graphitic Materials
  • Life Tests
  • Load Cells
  • Measurement
  • Mechanics
  • Reliability
  • Schools
  • United States
  • United States Naval Academy

Readers

  • Electrical Engineering
  • Mechanical Engineering/Mechanics of Materials.
  • Reinforced Composite Materials

Technology Areas

  • Space