1. A rotating 1-in diameter solid round bar has a groove 0.1-in deep with a 0.1-radius machined into it. The bar is made of AISI 1020 CD steel and is subjected to a purely reversing torque of 1800 lbf-in. For the S-N curve of the material, let f= 0.9. 1) Estimate the number of cycles to failure. 2) If the bar is also placed in an environment with a temperature of 750 °F, estimate the number of cycles to failure.

1. A rotating 1-in diameter solid round bar has a groove 0.1-in deep with a 0.1-radius machined into it. The bar is made of AISI 1020 CD steel and is subjected to a purely reversing torque of 1800 lbf-in. For the S-N curve of the material, let f= 0.9. 1) Estimate the number of cycles to failure. 2) If the bar is also placed in an environment with a temperature of 750 °F, estimate the number of cycles to failure.

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

See similar textbooks

Similar questions

Q4/ Answer one of A) A cylindrical rod of 16 mm diameter is made of plain carbon steel. It is subjected to axial load of 5000 N, a steady torque of 50 N-m and bending moment of 75 N-m. Using the theories of failure to calculate:- 1) The factor of safety available. Assume yield strength as 400 MPa for plain carbon steel. And then comment on the result you get. 2) The maximum yield strength of shaft material would be necessary using factor of safety of 1.686.
Required information The cold-drawn AISI 1040 steel bar shown in the figure is subjected to an axial load that fluctuates from 8 kN to 30 kN. Use the Modified Goodman criterion and estimate the fatigue factor of safety based on achieving infinite life and the yielding factor of safety. 25 mm 10mm -6-mm D. What is the number of cycles to failure for this part? The number of cycles is 120000
Do in a minute
Q8 Beta =111 Please provide justified answer asap to get a upvote
(b)Find the torque required to raise the load of 15kN and mean diameter of triple threaded screw being 46mm. Also gIven pitch = 8mm and coefficient of friction is 0.15?
Q8
B) A simply supported shaft is shown in the following Figure. A constant magnitude distributed unit load p is applied as the shaft rotates. The shaft is also subject to a steady torque of Tmax 2000-N -m., find the diameter of shaft required to obtain a safety factor of 2.5 in fatigue loading if the shaft is steel of Sut 814 MPa and Sy 703 MPa. The dimensions are in cm, the distributed force in N/cm, and the torque is in N-m. No stress concentrations are present, the shaft is machined, the required reliability is 90%, and the shaft operates at room temperature Figure: 1= 20-cm: b = 18-cm ; a = 16 cm Applied distributed load p:= 1000 N em ; 区区

Solve 5,6
Pravinbhai
None
A round bar of length /= 100 mm, diameter d 20 mm, is subjected to an axial force P- 500 N, a transverse force F5000 N, and a torque T-50 N.m. The material is steel with Sy 480 MPa. Using the distortion energy (Von Mises) yield criterion, calculate the safety factor at points A and B. 20 D. Select one: O a. NA = 7.897, Ng = 4.958 O b. NA = 0.624, Ng- 4.352 Oc. NA 4.768, Ng 2.346 O d. NA = 0.749, Ng =5.223
4. The shaft that is pictured is to be loaded by a purely reversing load, cycling at ± 500 lbf. The shaft is to be machined, operate in an environment at 100°C, have a reliability of 90%, and be made of a material in which Sut= 80 kpsi and Sy = 65 kpsi. The stress concentrations at A are K₁ = 1.6 for bending and Kt = 2.0 for torsion. Assume the notch sensitivity factor for torsion and bending to be 1.0. 10 inches a. Using the information provided with the attached log-log scale, create an S-N diagram assuming a steel shaft subjected to only bending. Estimate how many cycles of life can be expected if the alternating stress is 60 kpsi. F = ± 500 lbf b. would the S-N diagram from part (a) be different if only torsion were experienced (no bending)? Briefly explain why. c. ( Using a factor of safety of 2.0 based on infinite life, determine the minimum allowable diameter for shaft AB using the modified-Goodman criterion. B 8 inches