A rectangular bar is cut from an AISI 1020 cold-drawn steel flat. The bar is 2.500 in wide by 4/8 in thick andhas a 0.500-in-dia. hole drilled through the center as depicted in Table A-15–1. The bar is concentricallyloaded in push-pull fatigue by axial forces Fa, uniformly distributed across the width. Using a design factorof na = 2, estimate the largest force Fa that can be applied ignoring column action.What are the values of the theoretical stress-concentration factor, the notch sensitivity, and the fatigue stress-concentrationfactor?The value of the theoretical stress-concentration factor isThe value of the notch sensitivity is(Round the final answer to three decimal places.)The value of the fatigue stress-concentration factor is(Round the final answer to three decimal places.)

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Elements Of Electromagnetics

7th Edition

ISBN:9780190698614

Author:Sadiku, Matthew N. O.

Publisher:Sadiku, Matthew N. O.

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A rectangular bar is cut from an AISI 1020 cold-drawn steel flat. The bar is 2.500 in wide by 4/8 in thick and
has a 0.500-in-dia. hole drilled through the center as depicted in Table A-15–1. The bar is concentrically
loaded in push-pull fatigue by axial forces Fa, uniformly distributed across the width. Using a design factor
of na = 2, estimate the largest force Fa that can be applied ignoring column action.
What are the values of the theoretical stress-concentration factor, the notch sensitivity, and the fatigue stress-concentration
factor?
The value of the theoretical stress-concentration factor is
The value of the notch sensitivity is
(Round the final answer to three decimal places.)
The value of the fatigue stress-concentration factor is
(Round the final answer to three decimal places.)

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A rectangular bar is cut from an AISI 1020 cold-drawn steel flat. The bar is 2.500 in wide by 4/8 in thick and has a 0.500-in-dia. hole drilled through the center as depicted in Table A-15-1. The bar is concentrically loaded in push-pull fatigue by axial forces Fa, uniformly distributed across the width. Using a design factor of na = 2, estimate the largest force Fa that can be applied ignoring column action. What is the largest force that can be applied to the part? (Round the final answer to three decimal places.) The largest force that can be applied is kips.
! Required information A rectangular bar is cut from an AISI 1020 cold-drawn steel flat. The bar is 2.500 in wide by 4/8 in thick and has a 0.500-in-dia. hole drilled through the center as depicted in Table A-15-1. The bar is concentrically loaded in push-pull fatigue by axial forces Fa, uniformly distributed across the width. Using a design factor of na = 2, estimate the largest force Fã that can be applied ignoring column action. Determine the endurance limit for this material as well as the value after correction for surface finish, sizing, and loading. The endurance limit for the material is kpsi. The endurance limit after correction is kpsi.
A solid round bar with diameter of 2 in has a groove cut to a diameter of 1.8 in, with a radius of 0.1 in. The bar is not rotating. The bar is loaded with a repeated bending load that causes the bending moment at the groove to fluctuate between 0 and 25 000 lbf in. The bar is hot-rolled AISI 1095, but the groove has been machined. Determine the factor of safety for fatigue based on infinite life and the factor of safety for yielding. .
A solid round bar with diameter of 2 in has a groove cut to a diameter of 1.8 in, with a radius of 0.1 in. The bar is not rotating. The bar is loaded with a repeated bending load that causes the bending moment at the groove to fluctuate between 0 and 25 000 lbf in. The bar is hot-rolled AISI 1095, but the groove has been machined. Determine the factor of safety for fatigue based on infinite life and the factor of safety for yielding. Plars & .
4. Determine the design stress for bolts in a cylinder cover where the load is fluctuating due to gas pressure. The maximum load on the bolt is 50 kN and the minimum is 30 kN. The load is unpredict- able and factor of safety is 3. The surface of the bolt is hot rolled and the suface finish factor is 0.9. During a simple tension test and rotating beam test on ductile materials (40 C 8 steel annealed), the following results were obtained : Diameter of specimen =12.5 mm; Yield strength= 240 MPa; Ultimate strength= 450 MPa; Endurance limit = 180 MPa. [Ans. 65.4 MPa]
In the diagram below shows a circula bar , made of AISI 1040 OQT 1300 steel (SU = 600 MPa), is loaded with an axial tensile loading P. Find the modified endurance strength (SE) and the modified fatigue strength (SF) for the bar if D = 36 mm, d = 30 mm, and r = 2.4 mm. Use the number of cycles tofracture to be 5 × 105. Assume that the surface finish factor, kf, is 0.85, the size factor, kS, is 0.85, and the notch sensitivity factor, qn, is 0.75. Use the following equations if needed,
MECH.ENG. DESIGN 1 PART 2
The round cross-sectional bar is cut from an AISI 1020 colddrawn steel with a diameter of 25 mm. The bar is loaded at its end with a completely reversed load Fmin = 5 kN, Fmax = -3 kN. Using a design factor of nd = 1.2, what will be the maximum length of the bar that prevents failure using Modified Goodman criteria? What length must be used if a more conservative criteria is used?
Estimate the endurance strength (Se) of a 1.49-in-diameter (d) rod of AISI 1040 steel having a machined finish and heat-treated to a tensile strength ( Su) of 108 kpsi, loaded in rotating bending. Obtain the parameters for Marin surface modification factor from Table 6-2. The endurance strength is kpsi
Calculate the maximum tensile stress developed in a 1/4-20 bolt (Major dia = 0.2500" and Root dia = 0.1959"), 3" long, and a head height of 0.1875", if it is subjected to a load of 426 lbs.
Q3/ For the Aluminum cantilever, shown in Fig.2 below, the factor of safety against fatigue is 2.4, the sensitivity factor 0.7, the surface finish factor is 0.91, the size factor is 0.6, Sut 320 MPa and yield strength is 61 Mpa. Calculate, using a proper design theory, the diameter at the fillet. Neglect the transverse shear stress. Fig.2 0.2d -50 kN (15 Marks) 100mm 150kN 200mm
A rotating shaft of 40×4 mm AISI 1018 cold-drawn steel tubing has a 6 mm diameter hole drilled transversely through it. Estimate the factor of safety guarding against fatigue and static failures using the Gerber and Langer failure criteria for the following loading conditions: a. The shaft is subjected to a completely reversed torque of 120 N.m in phase with a completely reversed bending moment of 150 N.m. b. The shaft is subjected to a pulsating torque fluctuating from 20 to 160 N.m and as steady bending moment of 150 N.m.

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