In crystal structure, materials which properties identical in all directions are: a. Anisotropic b. isotropic estable material d. non of answer
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In crystal structure, materials which properties identical in all directions are: a. Anisotropic b. isotropic estable material d. non of answer
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- Permanent deformations in structures refer to: A. linear elastic deformations B. deflection diagram C. linear inelastic deformation D. plastic deformationWhich of the following statements are true of dislocations? Select one or more: a. Dislocations can be viewed with high powered microscopy and not with the naked eye b. Dislocations can move under stress c. Dislocations can arise due to shear deformation of the lattice Od. Dislocations primarily enable high stiffness in metalsChoose all the properties that define what a mineral is. Solid Is harder than glass Has no structure Naturally occurring Has color O Organic Has cleavage(s) Inorganic Has an organized crystalline structure Can be expressed in terms of chemical formula Can be man-made
- The degrees of indeterminacy of the given structure isAt a temperature of 60°F, a 0.04-in. gap exists between the ends of the two bars shown. Bar (1) is an aluminum alloy [E = 10,000 ksi; v = 0.32; a = 12.3 × 106/°F] bar with a width of 3 in. and a thickness of 0.75 in. Bar (2) is a stainless steel [E = 28,000 ksi; v = 0.12; a = 8.9 x 10-6/°F] bar with a width of 2 in. and a thickness of 0.75 in. The supports at A and C are rigid. Determine the lowest temperature at which the two bars contact each other. (1) 3 in. 32 in. O 80.1°F O 118.6°F O 150.7°F O 132.9°F O 110.9°F B 2 in. 44 in. 0.04-in. gapAt a temperature of 60°F, a 0.04 in. gap exists between the ends of the two bars shown in the figure. Bar (1) is an aluminum alloy [E=10000 ksi; v=0.32; a= 12.5 x10^-6/,°F] bar with a width of 3 in. and a thickness of 0.75 in. Bar (2) is a stainless steel [E= 28000 ksi; v=0.12; a=9.6x10^-6/°F] bar with a width of 2 in and a thickness of 0.75 in. The supports at A and C are rigid. Determine the normal stress in bar (1) at a temperature of 380°F. Answer in ksi
- 3.What is a dislocation? List five more microscopic defects in bulk materials. Which of the following properties are most sensitive to dislocation structures in materials? a. Young's modulus b. Yield strength c. Conductivity d. TransparencyAt a temperature of 60°F, a 0.04-in. gap exists between the ends of the two bars shown in the figure. Bar (1) is an aluminum alloy (E-10,000 ksi; u= 0,32; a= 12.5 x10°/°F] bar with a width of 3 in, and a thickness of 0.75 in. Bar (2) is a stainless steel |E-28,000 ksi; u=0.12; a=9.6x10°/°F] bar with a width of 2 in. and a thickness of 0.75 in. The supports at A and C are rigid. Determine the normal stress in bar (1) at a temperature of 450°FAt a temperature of 60°F, a 0.04-in. gap exists between the ends of the two bars shown. Bar (1) is an aluminum alloy [E = 10,000 ksi; v = 0.32; a = 12.7 x 10-6/°F] bar with a width of 3 in. and a thickness of 0.75 in. Bar (2) is a stainless steel [E = 28,000 ksi; v = 0.12; a = 8.6 x 10-6/°F] bar with a width of 2 in. and a thickness of 0.75 in. The supports at A and C are rigid. Determine the lowest temperature at which the two bars contact each other. (1) 3 in. 32 in. 90.2°F O 69.9°F 139.2°F 103.5°F O 111.0°F B ↑ 2 in. ↓ 44 in. -0.04-in. gap
- At a temperature of 60°F, a 0.04-in. gap exists between the ends of the two bars shown. Bar (1) is an aluminum alloy [E = 10,000 ksi; v = 0.32; a = 14.4 x 10-6/°F] bar with a width of 3 in. and a thickness of 0.75 in. Bar (2) is a stainless steel [E = 28,000 ksi; v = 0.12; a = 9.6 × 10-6/°F] bar with a width of 2 in. and a thickness of 0.75 in. The supports at A and Care rigid. Determine the lowest temperature at which the two bars contact each other. (1) 3 in. 32 in. 105.3°F 75.3°F O 147.3°F 86.6°F 113.4°F B ↑ 2 in. ↓ (2) 44 in. 0.04-in. gapAt a temperature of 60°F, a 0.04-in. gap exists between the ends of the two bars shown. Bar (1) is an aluminum alloy [E = 10,000 ksi; v = 0.32; a = 13.4 x 10-6/°F] bar with a width of 3 in. and a thickness of 0.75 in. Bar (2) is a stainless steel [E = 28,000 ksi; v = 0.12; a = 10.1 x 10-6/°F] bar with a width of 2 in. and a thickness of 0.75 in. The supports at A and Care rigid. Determine the lowest temperature at which the two bars contact each other. (1) ↑ 3 in. 32 in. O 75.9°F O 146.5°F O 105.8°F O 122.3°F O 111.3°F 2 in. (2) 44 in. -0.04-in. gapWith the help of a diagram, contrast the stress-strain relationship with respect to ceramic and metalsWith the help of a diagram, contrast the stress-strain relationship with respect to ceramic and metals