2.67. Identify the two mate-rials in Fig. 2.5 that havethe lowest and the highestuniform elongations. Calcu-late these quantities as per-centages of the original gagelengths.Figure 2.5180160-304 Stainless steel 120070-30 Brass, as received8650 Steel1000140-1112 Steel,cold rolled70-30 Brass, annealedTrue stress (psi x4012010080608001020 Steel4130 Steel600Copper, annealed2024-T36 AI2024-0 Al4001100-O AI6061-0 Al20202001100-H14 AI000.2 0.4 0.6 0.8 1.0 1.2True strain (E)01.4 1.6 1.8 2.0MPa

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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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. From the tensile stress-strain behaviour for a casted iron as shown in the following curve. Please answer the following questions (1) Estimate the modulus of elasticity, (2) Calculate the change in length of a specimen with original length of 100mm that is subjected to a tensile stress of 300MPa. (Hint: Using the Hooke's law to get the strain.) 600 500 400 - 300 - 200 - 100 - 2 4 6. 8 10 12 14 16 Strain Strength (MPa)
The yield stresses (oy) have been measured using steel and aluminum specimens of various grain sizes, as follows: Q.1 Material D (um) σν (MPa) Steel 60.5 160 136 128 Aluminum 11.1 235 100 223 (a) Determine the coefficients oo and ky in the Hall- Petch for these two materials. (b) Determine the yield stress in each material for a grain size of d326 um.
A steel pipe with an outside diameter of 115 mm and an inside diameter of 105 mm supports the loadings shown. Assume a = 510 mm, b = 230 mm, P = 20 kN, P, = 16 kN, and P; = 11 kN. (a) Determine the normal and shear stresses on the top surface of the pipe at point H. (b)Determine the principal stresses and maximum in-plane shear stress magnitude at point H and show the orientation of these stresses on an appropriate sketch. a P: P H K
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O The following engineering stress-strain data were obtained for a 0.2% C plain-carbon steel. (i) Plot the engineering stress-strain curve. (ii) Determine the ultimate tensile strength of the alloy. (iii) Determine the percent elongation at fracture. Engineering Engineering Engineering Engineering Stress Strain Stress Strain (ksi) (in./in.) (ksi) (in./in.) 76 0.08 30 0.001 75 0.10 55 0.002 73 0.12 60 0.005 69 0.14 68 0.010 65 0.16 72 0.020 56 0.18 74 0.040 51 0.19 75 0.060 (Fracture)
The diagram below shows a microscopic metal rod with a single crystal structure whose orientation is indicated by the inset. A force of F = 28.4 N is applied to the rod. The cross-sectional area is 0.6 mm². Calculate the shear stress along the close-packed direction. ooog OOOO a. O b. 21.26 MPa O c. 14.11 MPa O d. 19.32 MPa O e. 17.78 MPa 16.23 MPa
Assume that the critical stress intensity factor orfracture toughness ðKIcÞ for a partially stabilizedzirconia is 10 MPa-m1=2. If there is a plate of thisceramic with a sharp edge notch 100 mm deep andsubjected to a stress of 300 MPa, will this plate beable to withstand this stress?
The diagram below shows a microscopic metal rod with a single crystal structure whose orientation is indicated by the inset. A force of F = 14.9 N is applied to the rod. The cross-sectional area is 1.1 mm². Calculate the shear stress along the close-packed direction. Dogo ooooo a. 4.65 MPa O b. 6.08 MPa c. 5.09 MPa O d. 4.04 MPa O e. 5.53 MPa
If you could produce AISI 1020 steel with a grain size of 50 nm, what would be the expectedyield stress, assuming a Hall--Petch response? (  MPa, k=0.56 MN/m3/2). Explain eachterm in H-P relation.
For a number of points during a tension test on Man-Ten steel, engineering stress and strain data are given in Table. Also given are minimum diameters measured in the necked region in the latter portions of the test. The initial diameter was 6.32 mm. (a) Determine the Young’s modulus; (b) Determine the true stress and strain throughout; (c) Calculate the true plastic strain for the beyond yielding.

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