A solid round bar with diameter D=1D=1 has a grove of depth e=0.1e=0.1 in, with radius...

A solid round bar with diameter D=1D=1 has a grove of depth e=0.1e=0.1 in, with radius r=0.1r=0.1 in, as shown in Table A-15-15. The bar is made of cold drawn steel with SUT=54SUT=54 kpsi. The bar is only subjected to reversing torque T=1.5T=1.5 klfb-in. Must carry at least 4 significant digits for everything. Estimate ff using equations, not Fig. 6-18. Knock down SUTSUT for torsion, but only AFTER calculating S?eSe? and ff; only then calculate aa, bb, and life NN with the lower SUTSUT. Use Eqs. 6-34 and 6-35b for notch sensitivity in terms of uncorrected SUTSUT and rr, not Fig. 6-21. Assume Nt=103,Ne=106Nt=103,Ne=106.
?? Calculate the endurance limit SeSe adjusted for modifying factors.
?? Calculate the reduction factor ff.
?? Calculate the intercept aa of the high-cycle fatigue line.
?? Calculate the slope bb of the high-cycle fatigue line.
?? Calculate the fatigue stress concentration KfsKfs adjusted for notch sensitivity.
?? Calculate the number of cycles NN to failure.

Expert Solution

samet mamat answered 2 years ago

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