Continuing on Example 7.2, the shaft is transmitting a maximum of 25 [kW] or 33.5 [hp] and…

Continuing on Example 7.2, the shaft is transmitting a maximum of 25 [kW] or 33.5 [hp] and running at 3000 [rpm] in the clockwise direction. It is subjected to a maximum bending moment that is equal to the maximum applied torque. Find the internal dynamic stresses if the shaft has a cylindrical diameter of 45 [mm] or 1.75 [in]. The selected material is set as HR AISI 1040 or ISO C40. Estimate the factors affecting fatigue knowing that the estimated life span is 10 years and the shaft operates eight hours a day, the reliability should be 99.99%, the operating temperature is about 380 [Continuing on Example 7.2, the shaft is transmitting a maximum of 25 [kW] or 33.5 [hp] and running...-1C] or 716 [Continuing on Example 7.2, the shaft is transmitting a maximum of 25 [kW] or 33.5 [hp] and running...-1F], the evaluated stress concentration factor KSC is 2.1, and the notch radius is 2.5 [mm] or 0.1 [in]. Find the safety factor for ASME elliptic dynamic fatigue theory of failure.

Example 7.2

With reference to Example 7.1, compare the ultimate strength properties to the Brinell hardness numbers utilizing the previously developed equations in Section 7.6.

Example 7.1

A mass spectrometer testing the composition of a machine element indicated the carbon content is around 0.5%. Other elements exist, but they are within the admissible ranges of plain carbon steel. If the measurement of hardness indicates a value of about HB 195, what is the expected heat treatment of the steel? Estimate the mechanical properties of the steel, and compare the values to the AISI 1050 or the ISO C50. If the material is to be water quenched and tempered to 205 [∘C] or (400) [∘F], what are the expected properties? Compare results with available information about the heat treated plain carbon steels.

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