Machine Design
Stress concentration factor is defined as the ratio of

Maximum stress to the endurance limit
Maximum stress to the nominal stress
Nominal stress to the maximum stress
Nominal stress to the endurance limit

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Machine Design
Which is correct statement? Stress concentration in cyclic loading is

Seriousness would depend on other factors
Equally serious in both types of materials
Very serious in ductile materials and less serious in brittle materials
Very serious in brittle materials and less serious in ductile materials

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