Question

The cantilevered bar in the figure is made from a ductile material and is statically loaded with Fx-320 lbf, Fy = 255 lbf, and F- 105 lbf. The critical stress element experiences = 58.4 kpsi, σ x ,axial =0.407 kpsi and τ = 15.6 kpsi. Determine the minimum factor of safety for fatigue at point A, based on infinite life. If the life is not infinite, estimate the number of cycles. The force F is applied as a repeated load (zero to maximum). The material is AISI 1015 CD steel. in 9 in 1 1/2-in 1/8-in R. 2 i 1-in dia 1 1/2-in dia 3/4-in dia. 12 in Table 1 Yield Strength, MPa (kpsi) 170 (24) Tensile SAE and/or Proce ing Strength, MPa (kpsi) Elongation in 2 in, % Reduction in Area, % Brine Hardness UNS No. AISI No. G10060 300 (43 330 (48280 (41) 320 (47 370 (53) 340 (50 390 (56 400 (58) 440 (64) 380 (53 470 (G8) 470 (O8) 520 (76) 500 (72) 550 (80) 520 (76 590 (85) 570 (82 630 (91) 620 (90 690 (100) 580 (84) 680 (98 770 2 42061.5) 830 (120) 180 (26) 300 (44) 190 (27.5) 320 (47) 220 (32) 370 (54) 210 (30 390 157) 260 37.3) 440 (64) 270 (39.5) 460 (67) 290 (42) 490 (71) 310 (45) 30 (77) 340 (49.5) G10150 1015 GI0180 1018 116 CD 126 G10200 CD G10300 20 137 G10350 35 G10400 35 G10450 G10500 370 (34) G10800 G10950 460 66)

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