Defects sought
Non-destructive testing - Ultrasonic inspection
Article REF: AM5407 V1
Defects sought
Non-destructive testing - Ultrasonic inspection

Author : Christian BUDNIK

Publication date: October 10, 1997 | Lire en français

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3. Defects sought

The defects that affect part quality and mechanical properties are found in a skin-nida-skin sandwich part:

  • delamination, foreign bodies, porosity in the inner and outer skins of sandwich parts;

  • bonding defects at nest-skin interfaces;

  • mesh deformations, shearing of the nida within it.

Note :

nida is short for honeycomb (see specialized articles in this treatise).

3.1 Defect terminology

Delamination is a frank decohesion between two composite plies.

Porosity refers to the presence of a large number of cavities smaller than 1 mm in diameter,...

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