Sketch the stress-strain curve of a f’c=3,000 psi concrete, and identify on the curve Ec, fc’,...
Sketch the stress-strain curve of a f’c=3,000 psi concrete, and identify on the curve Ec, fc’, fr, ec’, ecu (show values on the plot with appropriate units). Identify the elastic linear portion of the curve, and the nonlinear portion.
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Sketch the stress-strain curve of a f’c=3,000 psi concrete, and
identify on the curve Ec, fc’,...
Problem 3- Concrete Stress-Strain (Everyone) A normal density concrete has a compressive strength (fc) of 14,000...
Problem 3- Concrete Stress-Strain (Everyone) A normal density concrete has a compressive strength (fc) of 14,000 psi. Strain corresponding to peak stress (Eo) is 0.0025. A compressive stress is applied to the concrete. (a) This stress is increased in value from zero to 10,000 psi over a short period of time and is then reduced to 6,000 psi. Calculate the compressive strain in concrete at this point in (b) The stress is then increased to 12,000 psi. Calculate the compressive...
manifactoring processes 1) Sketch Engineering stress vs. Engineering strain curve and True stress vs. true strain...
manifactoring processes 1) Sketch Engineering stress vs. Engineering strain curve and True stress vs. true strain curve from one uniaxial tension test for an engineering metals that shows power law strain hardening (e.g. aluminum or steel), within the same plot, and identify, from the curves, the material property parameters of: Yield strength (0.2% offset) Uniform engineering strain ultimate tensile strength (eng.) true stress and true strain at the onset of necking K and n from power-law fitting (the range of...
Stress-strain curve represents the result of 6" x 12" concrete cylinders tested in compression. From the...
Stress-strain curve represents the result of 6" x 12" concrete cylinders tested in compression. From the results determine, • The approximate load causing the specified strength of the concrete • The tensile strength of the concrete per ACI 318-14 • The modulus of elasticity of concrete, based on: a. The appropriate ACI 318-14 expression b. the ACI 318-14's Secant approach 6 5 4 Stress, ksi 3 1 O 0.001 0.003 0.004 0.002 Strain
2) Draw two schematic graphs using pencil showing a typical stress-strain curve for aluminum. The first...
2) Draw two schematic graphs using pencil showing a typical stress-strain curve for aluminum. The first graph should show engineering stress vs engineering strain, and the second graph should show true stress vs true strain. Label the showing: (i) elastic modulus (ii) proportional limit (iii) yield stress (iv) yield strain (v) fracture stress (vi) fracture strain on each graph. You may show both graphs on one plot. (5 points)
Page 5 ofs Question2 (10 pts.) The stress-strain curve for a nonlinear, perfectly elastic material is...
Page 5 ofs Question2 (10 pts.) The stress-strain curve for a nonlinear, perfectly elastic material is shown below. A sample of the material is loaded until the stress reaches the value at Point B, after which the sample is unloaded to zero stress. What is the approximate permanent deformation in material? (MPa) 125 100 75ト 50 25 A 5 10 15 20 25 30 35 40 (x 10-4) (A) 0 (B) 0.001 (C) 0.002 (D) 0.003 Support your answers with...
1. Define normal stress (σ), give units and formulae where appropriate. 2. Define, with the aid...
1. Define normal stress (σ), give units and formulae where appropriate. 2. Define, with the aid of a diagram, the terms Shear Stress (r) and Shear Strain (y), giving their units and any relevant formulae. 3. Explain what bearing stress (ơbearin.) is and why it is important in mechanical design? Give 4. Define strain (E), give units and formulae where appropriate 5. Explain Hooke's Law and why it is important in mechanical design? Give units and formulae 6. Define Poisson's...
Problem 3- Concrete Stress-Strain (Everyone) A normal density concrete has a compressive strength (fc) of 14,000 psi. Strain corresponding to peak stress (Eo) is 0.0025. A compressive stress is applied to the concrete. (a) This stress is increased in value from zero to 10,000 psi over a short period of time and is then reduced to 6,000 psi. Calculate the compressive strain in concrete at this point in (b) The stress is then increased to 12,000 psi. Calculate the compressive...
Stress-strain curve represents the result of 6" x 12" concrete cylinders tested in compression. From the results determine, • The approximate load causing the specified strength of the concrete • The tensile strength of the concrete per ACI 318-14 • The modulus of elasticity of concrete, based on: a. The appropriate ACI 318-14 expression b. the ACI 318-14's Secant approach 6 5 4 Stress, ksi 3 1 O 0.001 0.003 0.004 0.002 Strain
2) Draw two schematic graphs using pencil showing a typical stress-strain curve for aluminum. The first graph should show engineering stress vs engineering strain, and the second graph should show true stress vs true strain. Label the showing: (i) elastic modulus (ii) proportional limit (iii) yield stress (iv) yield strain (v) fracture stress (vi) fracture strain on each graph. You may show both graphs on one plot. (5 points)
Page 5 ofs Question2 (10 pts.) The stress-strain curve for a nonlinear, perfectly elastic material is shown below. A sample of the material is loaded until the stress reaches the value at Point B, after which the sample is unloaded to zero stress. What is the approximate permanent deformation in material? (MPa) 125 100 75ト 50 25 A 5 10 15 20 25 30 35 40 (x 10-4) (A) 0 (B) 0.001 (C) 0.002 (D) 0.003 Support your answers with...
1. Define normal stress (σ), give units and formulae where appropriate. 2. Define, with the aid of a diagram, the terms Shear Stress (r) and Shear Strain (y), giving their units and any relevant formulae. 3. Explain what bearing stress (ơbearin.) is and why it is important in mechanical design? Give 4. Define strain (E), give units and formulae where appropriate 5. Explain Hooke's Law and why it is important in mechanical design? Give units and formulae 6. Define Poisson's...
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