Use of Multidimensional Fiber Grating Strain Sensors for Damage Detection in Composite Pressure Vessels

Abstract

Arrays of multi-axis fiber grating strain sensors have been integrated into a composite pressure vessel test article, and are used to monitor changes in the transverse and axial strain fields during curing and pressure cycling near cut tow and Teflon tape defects. These changes in the multi-axis strain due to four pressure cycles and repeated impacts are measured and compared to ultrasonic and eddy current scans. Examples of the remote detection of damage using transverse strain and transverse strain gradients is given as well as data showing the ability of the system to distinguish broken tow and delamination defects.

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Document Details

Document Type
Technical Report
Publication Date
Mar 01, 2004
Accession Number
ADA427508

Entities

People

  • Eric Udd
  • Kurt Mildenhall
  • Marley Kunzler
  • Mont Johnson

Tags

Communities of Interest

  • Sensors

DTIC Thesaurus Topics

  • Abstracts
  • Air Force
  • Bragg Gratings
  • Composite Materials
  • Damage Detection
  • Delamination
  • Demonstrations
  • Detection
  • Detectors
  • Eddy Currents
  • Fibers
  • Optical Fibers
  • Polarization
  • Pressure Vessels
  • Refraction
  • Refractive Index
  • Three Dimensional

Readers

  • Mechanical Engineering/Mechanics of Materials.
  • Reinforced Composite Materials
  • Structural Health Monitoring of Composite Structures.