GATE_AE_2027_MOCK_01_Q35
GATE 2027 Aerospace Engineering All-India Master Mock 01 (Foundation & Standard Core Calibration)
MCQ · 1 Mark
Aerospace Structures • Aerospace Materials & Fatigue • Aluminum, Titanium & Aerospace Alloys
In aircraft wing skin structures, Aluminum-Copper alloy 2024-T3 is widely favored for the lower wing skin primarily due to its:
(A) Superior fatigue resistance and fracture toughness under cyclic tensile loads
(B) Higher compressive yield strength than 7075-T6
(C) Immunity to galvanic corrosion with carbon fiber
(D) Low density comparable to magnesium
Answer Key:
A
Step-by-Step Verified Solution
### Solution: Lower wing skins experience predominantly cyclic tensile stresses during flight, making high fracture toughness and fatigue crack growth resistance (embodied by 2024-T3) critical. 7075-T6 is preferred on the upper skin for compression buckling. Correct: A.