These inspections were conducted in a similar method as compared to standard inspections, which use chain-dragging and hammer-sounding to aid in determining the extent of potential delaminations
. When a delamination
was detected, spray paint was used to mark out the boundaries.
During experiment it was hard to detect amplitude difference between reflections from delamination
and good interface.
Use of a desiccant chamber (dry box), or bagging and sealing, usually solves assembly delamination
Since the viewing sequence is moving downward, this feature is probably the upper portion of a delamination
lower in the sample.
The deviation in the plates or of the plates disturbs the symmetry and this deviation is referred as delamination
and traversal imperfection (Beznea and Chirica, 2011).
Especially for the delamination
of composites techniques Lamb waves, X-ray CT, acoustic emission and thermography are normally used .
Feng, Lopes Ribeiro, and Geirinhas Ramos  analysed the interaction of symmetric [S.sub.0] and antisymmetric [A.sub.0] mode with the delamination
using finite element simulations.
Many authors have also proposed different mathematical formulations to analyze the delamination
crack growth in composite laminates under static loadings [9-12].
Several factors of the delamination
were obtained and evaluated, such as delamination
width, machine tool load and surface roughness of composite materials.
In particular, the material may display three different behaviors: only thermoelastic effects meaning that no damage occurred, small temperature increases to account for light delamination
and/or microcracks formation, or strong temperature rise in correspondence of severe breakage.
Hocheng and Tsao  studied the influence of five different drill geometries on thrust force and delamination
of carbon fiber reinforced composites: twist drill, saw drill, stick drill, core drill and step drill.