6-34* A solid circular structural steel (see Appendix B for properties) shaft is securely fastened to a solid cold-rolled bronze shaft, as indicated in Fig. P6-34. For the steel, the al- lowable normal stress is 125 MPa and the allowable shear- ing stress is 75 MPa; for the bronze, the allowable nor- mal stress is 260 MPa and the allowable shearing stress is 150 MPa. The allowable angle of twist in the 3.5-m length is 2.5°. Determine the maximum permissible value of the

6-34* A solid circular structural steel (see Appendix B for properties) shaft is securely fastened to a solid cold-rolled bronze shaft, as indicated in Fig. P6-34. For the steel, the al- lowable normal stress is 125 MPa and the allowable shear- ing stress is 75 MPa; for the bronze, the allowable nor- mal stress is 260 MPa and the allowable shearing stress is 150 MPa. The allowable angle of twist in the 3.5-m length is 2.5°. Determine the maximum permissible value of the

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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The figure shows a section of a shaft made of annealed steel with yield strength of 600 MPa and ultimate tensile strength of 700 MPa. Diameters of the shaft are D=30 mm and d=20 mm. Fillet radius of the shoulder section is 2.5 mm. The shaft is rotating and subjected to steady bending moment of M=51 Nm, steady torsion of T=58 Nm and steady axial load of F=14 kN. The operating temperature of the shaft is 20 ᵒC and reliability is 99%. The shaft has ground surface.Calculate the mean component of the shear stress (in MPa)
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A homogenous bar AC with negligible mass is supported by a pin at A and cable BC, carried a load of 20 kN as shown in the figure. Determine the pin dieameter at A if the allowble shearing stress is 80 MPa. (double shear)
A solid brass bar of diameter d =1.25 in. issubjected to torques T1, as shown in part a of the figure.The allowable shear stress in the brass is 12 ksi.(a) What is the maximum permissible value of thetorques T1?(b) If a hole of diameter 0.625 in. is drilled longitudinallythrough the bar, as shown in part bof the figure, what is the maximum permissiblevalue of the torques T2?(c) What is the percent decrease in torque and thepercent decrease in weight due to the hole?
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The figure shows a section of a shaft made of annealed steel with yield strength of 600 MPa and ultimate tensile strength of 700 MPa. Diameters of the shaft are D=30 mm and d=20 mm. Fillet radius of the shoulder section is 2.5 mm. The shaft is rotating and subjected to steady bending moment of M=51 Nm, steady torsion of T=58 Nm and steady axial load of F=14 kN. The operating temperature of the shaft is 20 ᵒC and reliability is 99%. The shaft has ground surface. Calculate the alternating component of the normal stress (in MPa). (If there is no alternating component of the normal stress, enter "0" in the answer box)
a 4ll Asiacell Q2 A 20 mm diameter steel rod passes concentrically through a bronze tube (200+SN) mm long, 50 mm external diameter and 40 mm internal diameter. The ends of the steel rod are threaded and provided with nuts and washers which are adjusted initially so that there is no end play at 25°C. 1. Assuming that there is no change in the thickness of the washers, if the stress produced in the steel is (200+SN) MN/m2 when one of the nuts is tightened, the pitch of the thread being 1 mm. Find the number of turns for the nut and stress in bronze tube.2. If the temperature of the steel and bronze is then raised to 40°C find the changes that will occur in the stresses in both materials. The coefficient of linear expansion per C is 10 x10-6 for steel and 17 x10-6 for bronze. E for steel = 210 GN/m2. E for bronze = 100 GN/m2. Where SN=3 إجابتك
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a) Refer to the figure below. Even though the cyclic loading accidentally caused the stresses to exceed the levels at point A slightly (as marked by the red arrow), the machine part may not break instantly according to the Modified Goodman fatigue failure criterion. True or False - Yield (Langer) line Gerber line - Load line, slope r = S„ISm Modified Goodman line S. I JA ASME-elliptic line Soderberg line ! Sm S, Midrange stress om b) good fatigue design should keep the fatigue design factor of safety at a minimum value of (_ Alternating stress o
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