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7-2 Problem 7-2 Section of a shaft containing a grinding-relief groove. Unless otherwise specified, the diameter at the root of the groove d, = d - 2r, and though the section of diameter d is ground, the root of the groove is still a machined surface. The section of shaft shown in the figure is to be designed to approximate relative sizes of d = 0.75D and r = D/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 lbf 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.

7-2 Problem 7-2 Section of a shaft containing a grinding-relief groove. Unless otherwise specified, the diameter at the root of the groove d, = d - 2r, and though the section of diameter d is ground, the root of the groove is still a machined surface. The section of shaft shown in the figure is to be designed to approximate relative sizes of d = 0.75D and r = D/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 lbf 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.

Elements Of Electromagnetics
Elements Of Electromagnetics
7th Edition
ISBN:9780190698614
Author:Sadiku, Matthew N. O.
Publisher:Sadiku, Matthew N. O.
ChapterMA: Math Assessment
Section: Chapter Questions
Problem 1.1MA
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7-2 Problem 7-2 Section of a shaft containing a grinding-relief groove. Unless otherwise specified, the diameter at the root of the groove d, = d - 2r, and though the section of diameter d is ground, the root of the groove is still a machined surface. The section of shaft shown in the figure is to be designed to approximate relative sizes of d = 0.75D and r = D/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 lbf 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.
Transcribed Image Text:7-2 Problem 7-2 Section of a shaft containing a grinding-relief groove. Unless otherwise specified, the diameter at the root of the groove d, = d - 2r, and though the section of diameter d is ground, the root of the groove is still a machined surface. The section of shaft shown in the figure is to be designed to approximate relative sizes of d = 0.75D and r = D/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 lbf 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.
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