Non-destructive method for detecting zones with non conductive materials in a composite part
View Patent ↗Non-destructive method for detecting zones with non-conductive materials, such as materials that include glass fibers, in a part made of a conductive composite, such as a composite whose reinforcing fibers are carbon fibers, provided with an organic coating, that includes the following stages: a) providing a device for applying an electric potential on the surface of said part; b) determining the dielectric breakdown potential Pr corresponding to the thickness E of the coating; c) applying said dielectric breakdown potential Pr with said device to the part for the purpose of identifying those zones that have non-conductive materials when dielectric breakdown does not occur in them.
1. Non-destructive method for detecting zones with non-conductive materials in a part made of a conductive composite provided with an organic coating, characterized in that it comprises the following stages:
a) providing a device for applying an electric potential on the surface of said part;
b) determining the dielectric breakdown potential Pr corresponding to thickness E of the coating;
c) applying said dielectric breakdown potential Pr with said device to the part for the purpose of identifying those zones that have non-conductive materials when dielectric breakdown does not occur in them.
2. Method according to claim 1 , characterized in that said dielectric breakdown potential Pr is obtained by applying, for each specific coating, a function that depends on the thickness E of the coating, established on the basis of data obtained in tests.
3. Method according to claim 1 , characterized in that said conductive composite is a composite whose reinforcing fibres are carbon fibres.
4. Method according to claim 1 , characterized in that said non-conductive material is a material that includes glass fibres.
5. Method according to claim 1 , characterized in that said part is a structural element of an aircraft.