Problem Statement: A solid round bar with diameter D = 1 in, has a grove of depth = 0.02381 in, with radius r=0.07143 in, as shown in the Figure. The bar is made of steel SAE 1020 CD with SUT- 68 kpsi, endurance Se= 34 kpsi, and f=0.9. The bar is subjected to reversing torque T = +2.5 klfb-in, in phase with a push-pull force F = +8 klbf. Estimate the life N. Use Eqs. 6-34 and 6-35 for notch sensitivity, not Fig. 6-20/21. Assume N₁ = 10³, № 106. • Calculate the component intercepta of the high-cycle fatigue line. • Calculate the component slope b of the high-cycle fatigue line. • Calculate the fatigue normal-stress concentration Kf adjusted for notch sensitivity. • Calculate the fatigue shear-stress concentration Kfs adjusted for notch sensitivity. Calculate the number of cycles N to failure. Answer tolerance = 2%. Be sure to include units and the correct sign with your answers. Carry at least 4 significant digits for everything. Your answers: a (no units) = b (no units) = Kf (no units) = Kfs (no units) = 1.3924 N (no units) 1750.856 110.16 .08509

Problem Statement: A solid round bar with diameter D = 1 in, has a grove of depth = 0.02381 in, with radius r=0.07143 in, as shown in the Figure. The bar is made of steel SAE 1020 CD with SUT- 68 kpsi, endurance Se= 34 kpsi, and f=0.9. The bar is subjected to reversing torque T = +2.5 klfb-in, in phase with a push-pull force F = +8 klbf. Estimate the life N. Use Eqs. 6-34 and 6-35 for notch sensitivity, not Fig. 6-20/21. Assume N₁ = 10³, № 106. • Calculate the component intercepta of the high-cycle fatigue line. • Calculate the component slope b of the high-cycle fatigue line. • Calculate the fatigue normal-stress concentration Kf adjusted for notch sensitivity. • Calculate the fatigue shear-stress concentration Kfs adjusted for notch sensitivity. Calculate the number of cycles N to failure. Answer tolerance = 2%. Be sure to include units and the correct sign with your answers. Carry at least 4 significant digits for everything. Your answers: a (no units) = b (no units) = Kf (no units) = Kfs (no units) = 1.3924 N (no units) 1750.856 110.16 .08509

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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