Standard Practice for Infrared Flash Thermography of Composite Panels and Repair Patches Used in Aerospace Applications

Importancia y uso:

5.1 Typically, FT is used to identify flaws that occur in the manufacture of composite structures, or to identify and track flaws that develop during the service lifetime of the structure. Flaws detected with FT include delamination, disbonds, voids, inclusions, foreign object debris, porosity, or the presence of fluid that is in contact with the backside of the inspection surface. For example, the effect of variable ply number (or thickness), bridging, and an insert simulating delamination on heat flow into a composite is shown in Fig. 1 (left). Bridging (Fig. 1, right) or delaminated areas show up as hot spots due to discontinuous heat flow, causing heating to be localized close to the inspection surface. With dedicated signal processing and the use of representative test samples, characterization of flaw depth and size, or measurement of component thickness and thermal diffusivity, may be performed.

Subcomité:

E07.10

Referida por:

E2981-21, E2533-21, E3353-22

Volúmen:

03.04

Número ICS:

49.035 (Components for aerospace construction)

Palabras clave:

composite; flash; IR; nondestructive; thermography;