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Real Time Detection of Damage During Quasi-Static Loading of a Single Stringer Panel Using Passive ThermographyReal time nondestructive evaluation is required for composites load testing. The early detection and measurement of damage progression is important to understand failure modes. A single stringer panel was subjected to quasi-static loading to induce deformation which can result in the formation of delamination damage between the stiffener flange and skin. Passive thermography was used to detect damage in real time as a function of the applied load. The loading was stopped when damage growth was detected. Of particular interest was the early detection of damage formation which can be challenging, as compared to cyclic fatigue loading. Passive thermography data were acquired and processed in real time and revealed damaged areas due to heating from fiber breakage and delamination formation. The processed thermal imagery was also compared to acoustic emission and ultrasound data.
Document ID
20180006311
Acquisition Source
Langley Research Center
Document Type
Other
Authors
Zalameda, Joseph N. (NASA Langley Research Center Hampton, VA, United States)
Horne, Michael R. (National Inst. of Aerospace Hampton, VA, United States)
Date Acquired
October 16, 2018
Publication Date
April 15, 2018
Subject Category
Fluid Mechanics And Thermodynamics
Report/Patent Number
NF1676L-28443
Meeting Information
Meeting: SPIE Defense and Commercial Sensing
Location: Orlando, FL
Country: United States
Start Date: April 15, 2018
End Date: April 19, 2018
Sponsors: International Society for Optical Engineering
Distribution Limits
Public
Copyright
Public Use Permitted.

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