Asee peer logo

Computer Based Instrumentation For Detecting Heat Damage In Composties

Download Paper |


2000 Annual Conference


St. Louis, Missouri

Publication Date

June 18, 2000

Start Date

June 18, 2000

End Date

June 21, 2000



Page Count


Page Numbers

5.160.1 - 5.160.9



Permanent URL

Download Count


Request a correction

Paper Authors

author page

Paul Kulowitch

author page

Asad Yousuf

Download Paper |

NOTE: The first page of text has been automatically extracted and included below in lieu of an abstract

Session 2559


Asad Yousuf, Paul Kulowitch Savannah State University/Naval Air Warfare Center Aircraft Division.


Polymer-matrix composites (PMCs) have acquired popularity and acceptance in the aerospace industry. Their mechanical characteristics and low weight makes them desirable for fabrication of the structural and nonstructural components. However, the PMCs suffers thermal degradation upon exposure to elevated temperatures. These thermally degraded resins experience drop in mechanical strength and are eventually damaged. Composites visual and microscopic inspection may indicate that the composite is undamaged but in actuality may have lost up to 70% of their original strength due to chemical changes resulting from heat damage.

This paper will discuss implementation and comparison of portable laser induced fluorescence system and laser induced imaging system to detect heat damage in composites. These systems were considered because conventional methods are not suitable to detect the aforementioned heat damage but are meant to detect mechanical damages such as cracks and material loss.

In an effort to understand the implementation of the techniques involved in the detection of heat damage in polymer composites, this paper will discuss the results from the previous study and this study to demonstrate that laser-induced fluorescence offers a great promise as a powerful, innovative approach for rapidly detecting incipient thermal damage in polymer. Finally, discussion on future work will be presented to refine software and hardware components to develop a robust and automated system.


Laser-Induced Fluorescence (LIF) spectroscopy is a sensitive and powerful approach for detecting molecules and atoms, measuring species concentrations and energy-level population

Kulowitch, P., & Yousuf, A. (2000, June), Computer Based Instrumentation For Detecting Heat Damage In Composties Paper presented at 2000 Annual Conference, St. Louis, Missouri. 10.18260/1-2--8227

ASEE holds the copyright on this document. It may be read by the public free of charge. Authors may archive their work on personal websites or in institutional repositories with the following citation: © 2000 American Society for Engineering Education. Other scholars may excerpt or quote from these materials with the same citation. When excerpting or quoting from Conference Proceedings, authors should, in addition to noting the ASEE copyright, list all the original authors and their institutions and name the host city of the conference. - Last updated April 1, 2015