1. What is the approximate ductility (%EL) of a cold worked brass that has a yield strength of 345 MPa (50,000 psi)1401201040 Steel1040 Steel120700600100500BrassBrass eoS400Brass300Copper40200Copper040 e0040Copper100O 10 20 30 40 50 60 70Percent cold work2000 10 20 30 40 50 60 70Percent cold workO 10 20 30 40 D0 60 70Percent cold work(a)(b)

Concept: From first graph-a, For brass(yellow graph) , at a yeild strength of 345 Mpa , the…

Answered: 1. What is the approximate ductility…

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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70% 5. Fatigue data of steel is showed in the following stress-cycle curve. Write down the values of steel endurance limit and steel fatigue strength at 10 cycles in the spaces provided below. 5.1. Steel Endurance Limit: ksi 5.2. Steel Fatigue Strength at 105 cycles: ksi SN Curve 50 45 40 Steel 35 30 Aluminium 20 15 10 10 10 10 10 Number of cycles 10 10 10 Page 5 of 6 (s) ssans
An aircraft component is fabricated from an aluminum alloy that has a plane strain fracture toughness of 31 MPa/m. It has been determined that fracture results at a stress of 227 MPa when the maximum (or critical) internal crack length is 2.47 mm. a) Determine the value of Yo√a for this same component and alloy at a stress level of 340 MPa when the maximum internal crack length is 1.24 mm. i MPa √//m b) Under these circumstances will the component fail? No Yes Unable to Determine 3
2. Calculate the stress in MPa retained in a metal due to shot peening, using the value of the slope indicated on the d vs. sin'y plot shown below. (1+v)/E=5.77x10-6 MPa¹; d₂-2.87179 Å Slope -0.010196 Å sin'y
Draw the systematic diagram
Q1. (i) Initial strain Please enter your supplied question data Q1. (ii) Eo B (hr¹Pa-¹) n IVICUITO Fracture 0.003 Please enter your answers here Your Q1. (i) Answers: 4.60E-34 Q1. (ii) 3.2 Q2. o (Pa) σo (Pa) 780,000,000 Q3. t (hr) Q2. A component is made from a metal that is known to be viscoelastic and behaves according to a secondary creep rate equation with constants of B and n provided as your input values. If the component is subjected to a constant force that results in the initial strain of E provided to you, determine the design stress for a secondary creep life of 1,000 hrs before attaining a limiting strain, &, of 0.01. Q3. If the same component is subjected to a constant displacement that results in the value of initial stress, o, provided to you, calculate the time for the stress to reduce to 200MPa. Young's modulus of the bolt is E = 200GPa.
Question 5: Following is tabulated data that were gathered from a series of Charpy impact tests on a tempered 4140 steel alloy. Temperature (°C) 100 75 50 25 0 -25 -50 -65 -75 -85 -100 -125 -150 -175 Impact Energy (J) 89.3 88.6 87.6 85.4 82.9 78.9 73.1 66.0 59.3 47.9 34.3 29.3 27.1 25.0 (a) Plot the data as impact energy versus temperature. (you can use Excel or other software). (b) Determine a ductile-to-brittle transition temperature as that temperature corresponding to the average of the maximum and minimum impact energies. (c) Determine a ductile-to-brittle transition temperature as that temperature at which the impact energy is 70 J.
Added the table in case if it’s needed
1. Suppose that you have measured the strain aging kinetics of a high-strength low-alloy (HSLA) steel and obtained the following results: Aging Temperature (°C) Aging Time (min) ΔΥ (MPa) 150 240 40 130 1800 40 Determine (using a mathematical rather than graphical approach) the time necessary to obtain a strengthening increment, AY, of 40 MPa at an ageing temperature of 120°C. State any assumptions made in order to arrive at your approximation.
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Q1/A structural part is 1-meter-long and subjected to a 50 KN load in which this part must be deformed elastically without experiencing any permanent deformation. If you know that part is made of steel, brass, aluminum, and Titanium alloys and the yield strengths and densities of these alloys are: 860 MPa, 7.9 g/cm³; 415 MPa, 8.5g/cm³; 310 MPa, 2.7 g/cm³; and 550 MPa, 4.5 g/cm³ respectively. Based on these criteria, rank the alloys from the heaviest to the lightest in weight.
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Asiacell l. ZA0 @ 团 / photo_2021-02-18_13-04... 200 stress 150 (MPa) 100 50 0.1 0-2 0.3 strain From the tensile stress -strain behavior for the brass specimen ,cP the diameter is 12-8 mm Calculat e the follouding :- 1- The Yield stress , 2-Modulus of elasticity. - The Tensile strength .

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