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Fatigue performance measure of materials Identify the standard property used to indicate resistance to fatigue failure under cyclic loading. Choose the correct option.

Difficulty: Easy

Elastic limit
Young's modulus
Ultimate tensile strength
Endurance limit

Correct Answer: Endurance limit

Explanation:

Concept
The endurance limit (or fatigue limit) is the stress amplitude below which a material can theoretically endure an infinite number of cycles without failure (for some ferrous alloys). It is the standard measure of fatigue resistance.

Why others are incorrect
Elastic limit and E relate to elastic behavior; UTS measures monotonic strength, not endurance under cyclic loads.

Final Answer
Endurance limit

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