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Q6_04m - which varies from 5 ksi to 15 ksi Determine the...

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ME 466 - Machine Design NAME _________________________________ Summer Term, 2004 Quiz 6, 25 Points, Open Book 1. (10 Points) Determine the fatigue strength of a machined 3/4 inch diameter 4140 steel shaft (heat treated - oil quench- and tempered at 800 ° F) which is to be designed for a life of 60,000 revolutions. 2. (15 Points) A steel cantilever beam is subjected to a fluctuating force which causes a bending stress at the wall
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Unformatted text preview: which varies from 5 ksi to 15 ksi. Determine the factor of safety of this application if the beam has a yield strength of 75 ksi, an ultimate tensile strength of 125 ksi, a fully corrected fatigue strength of 50 ksi, and a notch sensitivity of 0.80. The stress concentration at the wall is 2.40....
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