What is stress
Stress is defined as the intensity of force that acts per unit area.
What are the different kinds of stresses.
There are three kinds of stresses - Normal stress, Shear stress, and Volumetric stress.
Normal stress [σ] - Normal stress occurs when a force acts perpendicular to the surface area.
| Normal stress [σ] = |
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Shear stress [τ] - Shear stress occurs when a force acts parallel to the surface area.
| Shear stress [τ] = |
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Volumetric stress [σv] - Volumetric stress occurs when a force acts such that it create in increase volume.
What is strain?
Strain is defined as the ratio of change in dimension to the original dimension.
What are the different kinds of strains?
There are three kinds of strains. Linear strain, Shear strain, and Volumetric strain.
Linear strain [ε] - Linear strain is defined as the ratio of change in dimension to original dimension.
| Linear strain [ε] = |
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Shear strain [Φ] - Shear strain is defined as the ratio of change in shear dimension to the original dimension.
| Shear strain [φ] = |
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Volumetric strain [εv] - Volumetric strain is defined as the ratio of change in volume to the original volume.
| Volumetric strain [εv] = |
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What is Stress-Strain curve?
Stress-Strain curve is a graph that shows the relation between stress and strain for a material. Stress-Strain curve is drawn on the stress-Strain graph which has Stress on X axis and Strain on Y axis.
What is Hooke's law?
Hooke's law states that for relatively small deformations of objects, the force required to create the deformation is directly proportional to the size of deformation.
What is Poisson's ratio?
Poisson's ratio [ν] is defined as the ratio of lateral strain to longitudinal strain.
Formula
| Poisson's ratio [ν] = |
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What is Young's modulas?
Young's modulus [E] is a measure of stiffness of an object, and is defined as the ratio of longitudinal stress to strain.
| Young's modulus [E] = |
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What is Rigidity modulus?
Rigidity modulus [G] is defined as the ratio of shear stress to shear strain.
| Rigidity modulus [G] = |
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What is the Bulk modulas?
Bulk modulus [G] is a measure of resistance of a body to external pressure. It is defined as the ratio of applied pressure to the decrease in volume (volumetric strain).
| Bulk modulus [G] = |
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What is temperature stress?
An object undergoes a change in length when it is heated. If this length is restrained, then stress is induced in the object. This is known as temperature induced stress.
What is temperature coefficient of expansion?
Coefficient of Expansion [α] - is defined as the change in length in an object of unit length when heated by a temperature difference of 1 unit
Strength of Materials - Interview Questions
