College - Author 1

College of Engineering

Department - Author 1

Materials Engineering Department

Degree Name - Author 1

BS in Materials Engineering

College - Author 2

College of Engineering

Department - Author 2

Materials Engineering Department

Degree - Author 2

BS in Materials Engineering



Primary Advisor

Trevor Harding, College of Engineering, Materials Engineering Department

Additional Advisors

Armen Kvryan, Naval Surface Warfare Center, Port Hueneme Division


The Naval Surface Warfare Center, Port Hueneme Division, is interested in the development of non-destructive damage assessment of shipboard materials via drones at distance. Long Pulsed Thermography (LPT), a method of non-destructive evaluation, was investigated as a possible method for detecting damage in metals (5005h24 Al alloy and 1008 carbon steel) and composites (aramid fiber honeycomb sandwich structure) at distances from 0.5 m to 3.0 m. LPT was conducted using two 1000 W can lights to heat the samples, and a FLIR E8-XT thermal camera. The images were then analyzed using ImageJ software to determine if damage could be detected from the thermal images. LPT detected damage most consistently in the composite material at distances of 0.5 m and 1.5 m. Camera resolution limited measurement at longer distances. Damage was only detectable at 0.5 m in both metal samples due to the reflection of heat from their surfaces. Though the ImageJ software was able to detect some defects that were visually detectable in the thermal images, it failed to consistently or accurately determine damage size. This study shows that damage detection is possible at near distances (0.5 m-1.5 m) for composites and even shorter distances for metals. However, characterization of samples with marine coatings aided by better image analysis algorithms are needed prior to implementation of this technology