Question

When performing a ring (coin tap) test on composite structures, a change in sound may be due to damage or to transition to a different internal structure.
(2) The extent of separation damage in composite structures is most accurately measured by a ring (coin tap) test.
Regarding the above statements,
A — only No. 1 is true.
B —- only No. 2 is true.
C — both No. 1 and No. 2 are true.

Answer 1

When conducting a ring (coin-The tap) test, a change in sound could point to a delamination. The switch to a new internal structure might also be to blame for the altered sound.

If delamination is found, further complex testing would be required to identify its extent. The material must be fed into the saw as you cut acrylic plastic sheets in order to prevent... The metallic ring test for honeycomb structural inspection yields two distinct metallic sounds: the facing sound and the core sound. 90% of all aircraft inspections of composite structures are visual, frequently with a Tap Test as a backup. The aviation sector employs a wide range of inspection methods, including the use of dye penetrants, bond testers, ultrasonic inspection, radiography, mechanical impedance, and thermography.

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