Standard Practice for Radiographic Examination of Flat Panel Composites and Sandwich Core Materials Used in Aerospace Applications

Importancia y uso:

5.1 Radiographic examination may be used during product and process design optimization, on line process control, after manufacture inspection, and in service inspection. In addition to verifying structural placement, radiographic examination can be used in the case of honeycomb core materials to detect node bonds, core-to-core splices, and core-to-structure splices. Radiographic examination is especially well suited for detecting sub-surface flaws. The general types of defects detected by radiographic examination include blown core, core corrosion, damaged filaments, density variation, entrapped fluid, fiber debonding, fiber misalignment, foreign material, fractures, inclusions, micro-cracks, node bond failure, porosity/voids, and thickness variation.

5.2 Factors that influence image formation and X-ray attenuation in radiographic examination, and which are relevant to interpreting the images for the conditions of interest, should be included in the examination request. Examples include, but not limited to, the following: laminate (matrix and fiber) material, lay-up geometry, fiber volume fraction (flat panels); facing material, core material, facing stack sequence, core geometry (cell size); core density, facing void content, adhesive void content, and facing volume percent reinforcement (sandwich core materials); overall thickness, specimen alignment, and specimen geometry relative to the beam (flat panels and sandwich core materials).

5.3 Information regarding discontinuities that are detectable using radiographic examination methods can be found in Guide E2533.

Subcomité:

E07.01

Referida por:

E1025-18, E2981-21, E2533-21

Volúmen:

03.04

Número ICS:

49.035 (Components for aerospace construction)

Palabras clave:

aerospace composites; computed radiology (CR); digital detector array (DDA); digital radiography (DR); fiber-reinforced polymer matrix composites; flat panels; high modulus fibers; high performance composites; honeycomb core; laminates; nondestructive evaluation (NDE); nondestructive inspection (NDI); nondestructive testing (NDT); polymeric matrix composites (PMC); radiography (RT); radioscopy (RTR); sandwich core materials; sandwich constructions; structural sandwich constructions;