Thermal imaging of graphite/epoxy composite samples with fabricated defectsConsideration is given to a thermal inspection system for quickly inspecting large area composites for increased reliability and maintainability of helicopters resulting from improved quality assurance manufacturing. The infrared camera/image processor-based inspection system was used to image defects in composites. Noncontacting and single-sided measurements were performed on graphite/epoxy samples with fiber volume fraction variations, fabricated porosity, impact damage, and inclusions in incurred lay ups. These defects were imaged by determining the variations in the cooling rates caused by differences in through ply thermal diffusivity. Attention is also given to the system's sensitivity to measuring the defects due to sample thickness.
Document ID
19920046031
Acquisition Source
Legacy CDMS
Document Type
Conference Paper
Authors
Zalameda, Joseph N. (NASA Langley Research Center; U.S. Army, Aviation Research and Technology Activity, Hampton VA, United States)
Winfree, William P. (NASA Langley Research Center Hampton, VA, United States)
Date Acquired
August 15, 2013
Publication Date
January 1, 1991
Subject Category
Quality Assurance And Reliability
Meeting Information
Meeting: Annual Review of Progress in Quantitative Nondestructive Evaluation