2. Given a plate that is 0.12 in thick and constructed from high carbon steel, 490 Brinell hardness, witha machined finish. Assume 95% reliability and an operating temperature of 250 °C. (Hint: to find arelationship between Brinell Hardness and ultimate tensile strength, see Chapter 3 of the textbook).a) Construct the log S- log N curve.b) The loading is completely reversed (omean=0), and infinite life is desired. What alternatingstress can be allowed with a safety factor of 2?

Answered: Image /qna-images/answer/f6d5d989-da83-423d-aea2-1686a0747912.jpg

Answered: 2. Given a plate that is 0.12 in thick…

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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An electric car manufacturer is looking to utilize some stock AISI 8740, hot rolled steel bars that are around 2 inches in diameter for their conveyor system that is being set up to start producing their own batteries. The data sheet shows the the bars to have 132,000 psi tensile strength, 87,500 psi yield strength, and 16.7% elongation. A hardness of 262 Bhn allows it to be finish machined after heat treatment. They keep their workspace at 70°F. What is the working endurance strength, Se? 39,750 psi 28,562 psi 42,500 psi 33,400 psi
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 700 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.
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.
Please answer all parts
Calculate the cutting force for the punching of the triangular slot shown in the figure for Mild steel and Aluminum 6061 alloy. 30 Each side of the triangle is equal to 30 mm. t= 5 mm (hints) Cutting force = StL S = Shear strength of sheet-metal 1 = Sheet-metal thickness L= Length of cutting edge T= Ultimate tensile strength of sheet-metal Tensile Strength (N/mm) Material Mild Steel 440 Aluminum 6061 alloy 310 AISI type 304 Stainless Steel 505 Shear strength for: Aluminum is approximately 50% of its tensile strength Mild steel is approximately 60% of its tensile strength Stainless steel is approximately 90% of its tensile strength
15.27 For the solid model of a fixture shown in Figure P15-27, the inside surface of the hole is subjected to a temperature increase of 80° C. The right end surfaces are fixed. Determine the von Mises stresses throughout the fixture due to this temperature increase. What is the largest von Mises stress? Is it a concern against yielding of the material? Assume the material is AISI 1020 cold-rolled steel. Figure P15-27. 40 mm 75 mm 30 dia. Fixed 20 rad. 30 mm Fixed 50 mm- 15 mm (All dimensions in mm units) H
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3) The machine component from problem 2 (bar with hole and notches) undergoes variable loading from 42,500N to 45,000N. The part is made from 6061-T6 aluminum (S_u = 310 MPa and S_y = 275 MPa). The machined part requires a reliability of 95%. The large size results in a gradient strength factor of c_G=0.8 (see note c in Table 8.1). Calculate the safety factor. If the safety factor is less than one (i.e., shaft fails), find the number of cycles to failure.
Using the figure from Question 2, imagine the lamp gets heavier and heavier until one of the cables breaks. If all of the cables have the same tensile strength, a) which one will break first, and b) why will that one specifically break first? You do not need to provide Given, Assume, and Problem Type/Features for this question. You just need to provide Find, Analyses and a Conclusion. Provide an explanation for b) that isclear, concise, correct and well organized. Use at least one diagram (2D or 3D) to make your case as to why one of them will break before the others. You can use equations/math to support your explanation as well, if you want, but expressing your answer in words and using logic will be all that is necessary. Youranswer to a) i.e. which one will break first, can be your “Conclusion” to Question 3
Please match Heat-Treated Steels with their hardness HB numbers, according to the charts shown below. a) SAE 1040 WQT at different Temperatures b) SAE 4140 OQT at different Temperatures c) SAE 4340 OQT at different Temperatures SAE 1040 WQT 1000 SAE 4140 OQT 1000 SAE 4140 OQT 1100 SAE 4340 OQT 800 a. HB = 415 b. HB = 341 c. HB = 311 d. HB = 269

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