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Questions and Answers
What is the carbon content of the steel bar that reached rupture at a load of 196 kN?
What is the carbon content of the steel bar that reached rupture at a load of 196 kN?
- 0.5%
- 0.2% (correct)
- 1.0%
- 0.8%
Which specimen exhibited the highest load at rupture?
Which specimen exhibited the highest load at rupture?
- All specimens had the same load at rupture
- Specimen 3 (0.8%) (correct)
- Specimen 1 (0.2%)
- Specimen 2 (0.5%)
What impact does increasing carbon content have on the yield strength of steel bars?
What impact does increasing carbon content have on the yield strength of steel bars?
- It remains constant regardless of carbon content.
- It is unrelated to the composition of steel.
- It increases with higher carbon content. (correct)
- It decreases as carbon content increases.
Which carbon content corresponds to the specimen with the lowest strain at rupture?
Which carbon content corresponds to the specimen with the lowest strain at rupture?
What should be true about the modulus of elasticity as carbon content increases?
What should be true about the modulus of elasticity as carbon content increases?
Flashcards
Tensile Stress
Tensile Stress
Tensile stress is calculated by dividing the applied load by the cross-sectional area of the material.
Tensile Strain
Tensile Strain
Tensile strain is the measure of deformation in a material under tension, calculated by dividing the change in length by the original length.
Proportional Limit
Proportional Limit
The point on a stress-strain curve where stress and strain are directly proportional, meaning the material behaves elastically.
0.2% offset yield strength
0.2% offset yield strength
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Modulus of Elasticity
Modulus of Elasticity
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Study Notes
Tensile Tests on Steel Specimens
- Three steel specimens (0.2%, 0.5%, and 0.8% carbon content) with a 25mm diameter were subjected to tension until rupture.
- Gauge length was 50mm.
- Table P3.19 shows load vs. deformation data for each specimen at various deformation increments.
Calculations
- Calculate tensile stress and strain for each specimen and load increment.
- Plot stress vs. strain for all specimens on one graph.
Material Properties
- Proportional Limit: Determine the proportional limit for each specimen.
- 0.2% Offset Yield Strength: Determine the 0.2% offset yield strength for each specimen.
- Modulus of Elasticity: Determine the modulus of elasticity for each specimen.
- Strain at Rupture: Calculate the strain at rupture for each specimen.
Effect of Carbon Content
- Analyze the effect of increasing carbon content on:
- Yield strength
- Modulus of elasticity
- Ductility
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Description
This quiz covers the analysis of tensile tests conducted on steel specimens with varying carbon content. You will calculate tensile stress, strain, and material properties such as yield strength and modulus of elasticity. Additionally, you'll explore the impact of carbon content on the mechanical properties of steel.
