From the course: Introduction to Composite Manufacturing
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Thermography
- [Instructor] Thermal inspection comprises all methods in which heat-sensing devices are used to measure temperature variations for parts under inspection. All thermographic techniques rely on differentials in thermal conductivity between normal defect-free areas and those actually having a defect. Defect-free areas conduct heat more efficiently than areas with defects. The amount of heat that is either absorbed or reflected indicates the quality of the bond. The type of defects that affect the thermal properties include debonds, cracks, impact damage, thickness changes, water damage. Water ingress into composite materials and honeycomb can be detected by thermography. Thickness changes, when we talk about wear over time, friction can also easily be detected by thermography, but there are some limitations for those detection methods, and one of those is the thickness of the laminate. Also, where the defect is in relation to…
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