GATE_AE_2027_MOCK_04_Q35
GATE 2027 Aerospace Engineering All-India Master Mock 04 (Aerospace Structures, Thin-Walled Beams & Aeroelasticity)
MCQ · 1 Mark
Aerospace Structures • Aerospace Materials & Fatigue • Stress-Strain Behavior & Failure Theories
Under cyclic tensile-compressive fatigue loading, the stress ratio R is defined as:
(A) R = \sigma_{min} / \sigma_{max}
(B) R = \sigma_{mean} / \sigma_a
(C) R = \sigma_a / \sigma_y
(D) R = \sigma_{max} / \sigma_{min}
Answer Key:
A
Step-by-Step Verified Solution
### Solution: The fatigue stress ratio is universally defined as R = \sigma_{min} / \sigma_{max}. For fully reversed loading, R = -1. Correct: A.