Question

7-2 The section of shaft shown in the figure is to be designed to approximate relative sizes of d 0.75D andD/20 with diameter d conforming to that of standard rolling-bearing bore sizes. The shaft is to be made of SAE 2340 steel, heat-treated to obtain minimum strengths in the shoulder area of 175 kpsi ultimate tensile strength and 160 kpsi yield strength with a Brinell hardness not less than 370. At the shoulder the shaft is subjected to a completely reversed bending moment of 600 Ibf in, accompanied by a steady torsion of 400 lbf in. Use a design factor of 2.5 and size the shaft for an infinite life using the DE-ASME Elliptic criterion. Problem 7-2 Section of a shaft containing a grinding-relief groove. Unless otherwise specified, the diameter at the root of the groove dr-d-Zr, and though the section of diameter d is ground, the root of the groove is still a machined surface.

Answer 1

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1-46 (4-oo 54-g (13) 160 (103) 0-30 a I-23 in 3L. 1-23, -о-о 62 ih 2 O

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