Answer all the subparts. 1. A shaft made of steel having an ultimate strength of Su is finished by grinding the surface. The diameterof the shaft is d. The shaft is loaded with a fluctuating zero-to-maximum torque.% ultimate strength (MPa)% yield strength (MPa)% diameter of the shaft (mm)% surface factor kS% Su =1200;% Sy% d% kS800;8;%3D0.8;%3D13;% size (gradient) factor kG% kG% N = 75*10^3; % cycles%3D1. For N=75000 cycles, from S-N diagram, determine the fatigue strength (MPa).2. For N=75000 cycles and repeated loads (zero-to-maximum), from constant life fatigue diagram, deter-mine:alternating stress (MPa)maximum stress (MPa)

Answered: Image /qna-images/answer/7b5132b5-c9f0-4c63-bf04-7111981747f2.jpg

Answered: 1. A shaft made of steel having an…

1. A shaft made of steel having an ultimate strength of Su is finished by grinding the surface. The diameter of the shaft is d. The shaft is loaded with a fluctuating zero-to-maximum torque.

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

Multi part question The rotating shaft shown is subjected to a constant force. Shaft material is AISI 1020 cold drawn steel. The shaft was turned on a lathe using standard carbide tooling. No heat treatment of the shaft was performed. Assume 99% reliability based on material property data. Shaft dimensions are shown in the illustration below. All dimensions in mm. External force is 3.927 kN. Calculate the highest alternating stress in the shaft, in MPa. -20 -35 D. 180- -500 3R. -280- -175- -50 D. 25 D.
! Required information A 24-mm-diameter uniform steel shaft is 600 mm long between bearings. Take the value of acceleration due to gravity g to be 9.81 m/s2, the value of y for carbon steel to be 76.5 × 103 N-m-3, and the value of Eto be 207 x 10⁹ N/m². NOTE: This is a multi-part question. Once an answer is submitted, you will be unable to return to this part. What is the critical speed of the shaft in rads/s? (You must provide an answer before moving to the next part.) The critical speed of the shaft is 847.5 rad/s.
The shaft below is an engine component that is rotating. It is machined from an unknown ductile material with a measured ultimate tensile strength of 900 MPa. Answer the questions below assuming a desired reliability of 99% and a fatigue fraction, f, of 0.9. Round all values and answers to 2 decimal places Determine the maximum stress in the shaft due to the applied loading (hint: what is the maximum moment?) Estimate the endurance limit (hint: what is the relationship between Se and Sut and don’t forget any necessary modifying factors.) Determine the number of cycles to failure.
Let FA=100 N and FC= 208.33 N for the shaft below. The shaft is made of 2014 aluminum alloy with yield strength of 276 MPa. a) Based on the von Mises theory (use design safety factor of 4), select the shaft's cross-sectional dimension. What is the realized factor of safety? b) Based on the maximum shear stress (MSS) theory (use design safety factor of 4), select the shaft's cross-sectional dimension. What is the realized factor of safety?
A cantilevered round shaft with shoulder filet is to be used for application that involves cyclic loading and temperature of 400 °C such that a life of 500,000 cycles must be sustained with 99.9999% reliability. If the shaft is made of AISI 1018 hot rolled steel with f= 0.9: a) What is the maximum completely reversed force F,? b) What is the mean stress that can be applied with the stress amplitude resulting from F, if the fatigue strength S,= 70 kpsi? c) Repeat (a) for a torsional moment M, Axial Torsional 0.06 in 0.06 in M, 0.72 in 0.72 in 0.6 in 0.6 in
The internal diameter of a hollow shaft is 2/3 rd of its external diameter. Compare the strength and stiffness of the shaft with that of a solid shaft of the same material.
When selecting for a cheap, stiff shaft (i.e. in torsion) the constraint equations for the magnitude of twist use the shear modulus (G) rather than Young's modulus (E). Why can we reasonably substitute E (which is more readily available) for G in the material index? O Generally, E is proportional to G so ranking with one of them results in the same ranking order as with the other. O So long as the radius of the shaft is free, and so can compensate for the change in modulus, the constraint will be fulfilled either way. OG is smaller than E so fulfilling the constraint for G means we automatically fulfil the constraint using E. O The value for E and G are actually quite similar and the error introduced is small compared to the assumptions we are making.
What is the minimum diameter of a solid steel shaft that will not twist through more than 3° (degrees) in a 6 m. length when subjected to a torque of 14 kN-m? Use G = 83 kN/ m^2. Convert your answers to mm.
Question 2) The non-rotating shaft shown in figure (1) is made by 1050 HR machined steel. The shaft is subjected to a fluctuated bending moment varies from +20klb.in to -10klb.in. The working temperature is 200 Fahrenheit and the desired reliability is 90%. Find a) Ideal endurance strength, b) Marin factors, C) Endurance strength, d) Notch sensitivity factor and e)Safety factor based on Soderberg criterion. The length of the shaft = 7 ft, r =0.5 in, D= 4.2 in and d=4 in. Figure (1)
STRENGTH OF MATERIALS (Please write the complete solutions and FBD/Free-Body Diagram legibly. No long explanation needed. Rate/Thumbs up will be given. Answer in 3 Decimal Places) A steel 0.75-in diameter shaft (G= 12,000 ksi) is subjected to the following torques in lb-ft: TA = 10; TB = 30; TC = 70; TD = 50. The directions of the applied torques are indicated in the figure The bearings shown allow the shaft to turn freely. The length of each segment is equal to 38 in. (a) Plot a torque diagram showing the internal torque in segments (1), (2) and (3) of the shaft. Show the FBD of each segment using a double-headed arrow to represent each torgue. Determine (b) the maximum shear stress magnitude in the shaft. (c) the rotation angle of pulley C with respect to pulley A.
(7) The shaft shown is machined from C1040, OQT (oil-quenched treatment) @ 1,000°F. It is subjected to a torque that varies from zero to 10,000in-lb. (F = 0). Let r = 0.2D and N = 2. (a) Compute D. (b) What is the maximum torsional stress in the shaft?
Q.6 The Ray Precision Engineering company uses CNC Lathe machine. The reliability of Gear Box of CNC Lathe machine is given by: e-(Vo.002)•t t20 Evaluate the following: (i) The Reliability for the first 40 hours of operation; (ii) The MTTF and the failure rate; (iii) The Design life for a reliability of 85%.