Question

df 1n mon diame ss: F size 0.70 V): A cold drawn C-1025 steel rod of circular cross section is subjected to a variable bending moment of 10,000 in-lb to 17,000 in-lb, as the axial load varies from-2,000 lb to 5,000 lb. The maximum bending moment occurs at the same instant that the axial load is maximum. Determine the required diameter of the rod for a factor of safety N-2.3? The steel rod is connected to the support which causes a theoretical stress concentration factor K- 1.63. The notch sensitivity factor q may be taken at 0.87. Neglect any and column effect. Design is based on the basis of the maximum shear stress. For the given C-1025 cold drawn material: Ou 84,000 psi, σ,-67,500 psi, σ,-42,000 psi. The size correction factor is B 0.85. The surface correction factor is C 0.88, A-1.00 for bending, A 0.70 for axial load. (25 points)

Answer 1

Pageo in-lb Riveh Bendina Mome ao m1o, ooo Conveltin Bend'n 90.4 Nh Mom «t ohen abl en d ln No Mea Bend In v en TTd3 -21 29 85.79 MPa de and Stress 40 27.89 3 vev valent So frst endatane strength ơe and acis : D. 83 and kt:1.63

米 StandandSpecimenunl is ven al 42ooo Psi (e. 289.58 MPa cudale & μ.velant bend ng sevess 4027 979.88| 46.55% 216, 61 3 4 68 626.4Pa Acting Alone 44 2224-ї. -8896. + M Pa d2 dl 8 84 6.44 + 22 241.1 v) MPa

dl 214.61 ad S 84S 3.2 a. $8452.23448 626.41 ma 2- Case des 58453. 2 34612626.41 465| 396 2.3 しく + 57.2 84 Solvihe above e Rej.led dlamefess