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see attached capture for details. The test results shown below are the fatigue l

ID: 1858743 • Letter: S

Question

see attached capture for details.

The test results shown below are the fatigue lives of several notched rotating bending specimens. The specimens had a 0.3 in. diameter and contained a radial hole with a diameter of 0.055 in. The stress concentration factor for this geometry. K,, is 2.05. The properties for this material arc S., = 97 ksi 5 'un"0,eh' d' = 48 ksi a, = 150 ksi Determine how well the two estimation techniques shown on Figs. 4.11 and 4.12 predict the behavior of these specimens. (Data tak en from Ref. 19.)

Explanation / Answer

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