8 Questions
What is stress?
The internal force per unit area
How is normal stress calculated?
By dividing the applied force by the cross-sectional area
What kind of stress are tensile stresses considered?
Positive
In uniaxial loading, how many forces are applied along the same axis to a solid bar?
Two forces
What is Young's modulus?
The ratio of stress to strain
Which type of materials exhibit elastic and plastic deformation regions on stress-strain diagrams?
Ductile materials
What is shear stress?
When internal forces within a body are oriented parallel to the cross-section
What does strain quantify?
The deformations within a body
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.
Explore fundamental concepts of stress and strain in mechanics, including uniaxial loading, normal stress, strain, stress-strain diagrams, Young's modulus, shear stress, and shear modulus. Learn about the relationships between internal forces, deformations, and material properties within a body.
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