The presence of porosity or Foreign Object Debris (FOD) in a polymer composite is not readily detectable or quantifiable with conventional nondestructive inspection approaches. However, both FOD and porosity affect the bulk thermal conductivity, density and heat capacity of the material, and thus alter the rate at which heat flows through the sample volume. Case studies on cured and uncured composites will be presented.
- Describe the basic principles of thermographic NDI
- Identify single pixel time history behavior associated with common composite material configurations and flaw types
- List the unique challenges that composite materials pose to thermographic NDI