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Passive thermography is a large area inspection technique and is commonly used during fatigue loading of composite structures. Passive thermography allows for real time tracking of damage. This provides an accurate assessment of the damage progression as a function of load cycles and determines when the loading is stopped for ultrasonic or X-ray CT evaluations for detail damage assessment through-the-thickness. In addition, if new areas of damage growth are detected, with passive thermography, then those areas are additionally inspected with ultrasound or X-ray CT. A custom developed passive thermography inspection system for fatigue loading is presented. Passive thermography of damage progression is compared to ultrasound inspections as a function of the fatigue cycles. Discussion is made on processing of the thermal data for periodic and non-periodic thermal responses.
Joseph N. Zalameda andWade C. Jackson
"Acquisition and processing of passive thermography fatigue test data", Proc. SPIE 11409, Thermosense: Thermal Infrared Applications XLII, 114090R (28 April 2020); https://doi.org/10.1117/12.2557435
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Joseph N. Zalameda, Wade C. Jackson, "Acquisition and processing of passive thermography fatigue test data," Proc. SPIE 11409, Thermosense: Thermal Infrared Applications XLII, 114090R (28 April 2020); https://doi.org/10.1117/12.2557435