NDT.net - March 1999, Vol. 4 No. 3

HEAT DAMAGE IN GRAPHITE EPOXY COMPOSITES: DEGRADATION, MEASUREMENT AND DETECTION
A State-of-the-Art Report - NTIAC-SR-98-02

George A. Matzkanin
Nondestructive Testing Information Analysis Center,
George P. Hansen
Johnson & Johnson MedicalTM Division of Ethicon, Inc.
Prepared For NTIAC: Nondestructive Testing Information Analysis Center A DoD Information Analysis Center Sponsored by the Defense Technical Information Center (DTIC), September 1998, Approved for Public Release; Distribution Unlimited.
For more information contact:
George Matzkanin (matzkanin@ntiac.com) or Shelly Clark ( clark@ntiac.com),
(512) 263-2106 or (800) NTIAC 39.
URL: http://www.ntiac.com

TABLE OF CONTENTSPage

Prefaceiii

Table of Contentsv

List of Figuresvii

List of Tablesxi
1.0Introduction1
  1.1Background1
  1.2Scope and Organization2
2.0Characteristics of Thermal Degradation3
  2.1Degradation Mechanisms3
  2.2Mechanical and Materials Properties4

25 °C to 177 °C (77 °F to 350 °F)6

177 °C to 371 °C (350 °F to 700 °F)6

460 °C to 2982 °C (560 °F to 5400 °F)14

Summary14
  2.3Theoretical Modeling15
3.0Review of NDE Investigations27
  3.1General NDE Methods27
  3.2Diffuse Reflectance Infrared Fourier Transform Spectroscopy (DRIFTS).39
  3.3Laser Induced Fluorescence (LIF)45
4.0Conclusions54
5.0References56
AAppendix A
Summaries of Principal Work Cited in the Field of Graphite/Epoxy Composite Thermal Degradation
61
BAppendix B
Additional Bibliographic Citations on Graphite/Epoxy Thermal Degradation
64

1.0INTRODUCTION
1.1Background

1.2Scope and Organization

4.0CONCLUSIONS

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