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The infrequent tensile stress ____________ the fatigue life, whereas the infrequent compressive load ____________ fatigue life.

The infrequent tensile stress ____________ the fatigue life, whereas the infrequent compressive load ____________ fatigue life. Correct Answer Increases, decreases

The infrequent tensile stress on the crack tip on unloading produces the compressive residual stress on the crack tip, so it enhances the fatigue strength. Similarly, the compressive stress produces the tensile residual stress which reduces fatigue life.

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