Question 1 0.2 pts Fatigue data indicate that a particular material exposed to a

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Question 1 0.2 pts Fatigue data indicate that a particular material exposed to a stress amplitude of 400 MPa fails after 105 cycles. In this case, 400 MPa is called the yield strength fatigue limit fatigue strength at 105 cycles fatigue life 0.2 pts Question 2 For materials that have a fatigue limit (also called endurance limit, we would normally design such that the stress amplitude in a cyclic loading situation will be: O above the fatigue limit O below the fatigue limit No answer text provided. No answer text provided.

Explanation / Answer

a) It is called as Fatigue strength at 105 cycles.

Fatigue strength is defined as the value of stress at which failure occurs after Nf cycles, and fatigue limit, Sf, as the limiting value of stress at which failure occurs as Nf becomes very large.

the defination is taken from wikipedia.

b) It should be below the fatigue limit as at fatigue limit, it breaks after some cycles.

Endurance limit means no failure occurs after infinite cycles.

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