Aircraft Structures and Materials Flashcards

What is the function of a web in an aircraft wing spar?

Answer: To carry shear loads between the spar caps

The spar web primarily carries vertical shear loads, transferring them between the upper and lower spar caps.

When inspecting a composite structure for delamination, which non-destructive testing method is most effective?

Answer: Ultrasonic C-scan inspection

Ultrasonic C-scan inspection is the most effective NDT method for detecting internal delamination in composite laminates.

What type of corrosion forms between two dissimilar metals in contact with an electrolyte?

Answer: Galvanic corrosion

Galvanic corrosion occurs when two dissimilar metals are in electrical contact in the presence of an electrolyte, causing the anodic metal to corrode.

Which alloy designation series indicates aluminum alloyed primarily with zinc?

Answer: 7000 series

The 7000 series aluminum alloys use zinc as the primary alloying element, producing the highest-strength aluminum alloys.

What is the primary advantage of a geodesic (geodetic) airframe construction?

Answer: High strength-to-weight ratio with redundant load paths

Geodesic construction uses interlocking diagonal members that create a very high strength-to-weight ratio with multiple redundant load paths.

What is the minimum bend radius rule used to prevent when working sheet metal?

Answer: Cracking or fracturing of the metal

Observing minimum bend radius prevents cracking or fracturing of the metal on the outer surface of the bend.

In aircraft structural terminology, what is a 'joggle'?

Answer: A small offset in a structural member allowing parts to overlap flush

A joggle is a small step or offset formed into a structural member so that overlapping parts lie flush with each other.