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Nondestructive Testing (NDT) Study Guide & Core Inspection Methods Revision Notes

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Nondestructive Testing (NDT) Study Guide & Core Inspection Methods Revision Notes

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Nondestructive Testing (NDT) Study Guide & Core Inspection Methods Revision
Notes


What does the acronym NDI stand for? - ANS ✔✔Non-destructive inspection



List the two main ultrasonic methods used to inspect composite structures. - ANS ✔✔Pulse-
echo and through-transmission



List three limitations associated with ultrasonic inspection. - ANS ✔✔Requires a couplant
between the transducer probe and part being inspected.

Calibration standards are required for each type of material and thickness.

Interpretation of data demands carful aanallysis.



What type of composite structure can inspected using a light table. - ANS ✔✔...



Describe the "tap" test. - ANS ✔✔By tapping on the composite part and listening for a change in
sound.



List four limitations for"tap" testing. - ANS ✔✔Not good for deep damage.

Requires knowledge of the underlying structure .

not very effective in quantifying the degree of damage.

Cannot locate small defects.



Define the following damage types.

a. Delamination

b. Disbond or debond - ANS ✔✔a. A disbond between layers of plies in a laminate.

b. A lack of a bond between two substrates.

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