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Questions and Answers
What is stress?
What is stress?
- The internal force per unit area (correct)
- The ratio of internal force to cross-sectional area
- The change in angle due to shearing forces
- The deformation within a body
How is normal stress calculated?
How is normal stress calculated?
- By multiplying the deformation by the density of the material
- By adding the tensile and compressive stresses
- By dividing the applied force by the cross-sectional area (correct)
- By dividing the shear force by the length of the material
What kind of stress are tensile stresses considered?
What kind of stress are tensile stresses considered?
- Positive (correct)
- Neutral
- Zero
- Negative
In uniaxial loading, how many forces are applied along the same axis to a solid bar?
In uniaxial loading, how many forces are applied along the same axis to a solid bar?
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What is Young's modulus?
What is Young's modulus?
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Which type of materials exhibit elastic and plastic deformation regions on stress-strain diagrams?
Which type of materials exhibit elastic and plastic deformation regions on stress-strain diagrams?
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What is shear stress?
What is shear stress?
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What does strain quantify?
What does strain quantify?
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Study Notes
- Stress and strain are fundamental concepts used to describe how a body responds to external loads.
- Uniaxial loading involves two equal and opposite forces applied along the same axis to a solid bar, causing it to stretch.
- Internal forces develop within the bar to resist applied forces, and equilibrium is maintained through these internal forces.
- Stress is a measure of internal force per unit area, with normal stress being calculated as applied force divided by cross-sectional area.
- Normal stress can be tensile or compressive, with tensile stresses considered positive and compressive stresses negative.
- Strain is a quantity that describes deformations within a body, often expressed as a percentage.
- Stress-strain diagrams show the relationship between stress and strain, with ductile materials exhibiting elastic and plastic deformation regions.
- Young's modulus is the ratio of stress to strain and is an important material property.
- Shear stress occurs when internal forces within a body are oriented parallel to the cross-section, and shear strain is the change in angle due to shearing forces.
- Shear modulus is the ratio of shear stress to shear strain, and stress elements represent both normal and shear stresses acting at a single point within a body.
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