What is the stress intensity corresponding to a unit strain value called_______________?
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Answer: D. modulus of elasticity
Explanation
Modulus of elasticity is defined as the stress intensity corresponding to a unit strain value within the elastic range. This constant represents the slope of the linear elastic portion of a material's stress-strain curve. Higher elastic modulus values indicate stiffer materials that resist elastic stretching and deformation more effectively. Hooke's law establishes the linear proportionality between stress and strain up to the proportional limit. Units of modulus of elasticity match stress units since strain is a dimensionless ratio. Different metal alloys possess distinct elastic moduli determined by their microscopic crystal lattice structures.
Civil and mechanical engineers use the modulus of elasticity to calculate structural deflection under operational loads. Selecting materials with appropriate stiffness prevents excessive bending in precision machinery and buildings. Quality control laboratories measure elastic moduli to verify alloy composition and heat treatment consistency. Unit stress is a general term describing force per unit area rather than the specific stress-to-strain ratio. Bulk modulus measures a fluid or solid material's resistance to uniform volumetric compression under pressure. Modulus of rigidity relates shear stress to shear strain rather than tensile stress to linear strain.
- Subject
- Engineering
- Category
- Mechanical Engineering
- Topic
- —
- Difficulty
- medium
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