Fatigue failure of a material results from ______________ stress?
Correct answer: C. Fluctuating
- A. Tensile
- B. Compressive
- C. Fluctuating
- D. None of these
Explanation
Fatigue failure develops under repeated or fluctuating stress, often at stress levels below the material's static strength. A constant tensile or compressive stress alone normally causes static failure or creep rather than fatigue.
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