Among common structural options, which material displays the highest elasticity_________________?
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Answer: D. steel
Explanation
Steel possesses an exceptionally high modulus of elasticity, allowing it to resist elastic deformation under heavy loads. The atomic bonding forces within crystalline iron-carbon matrices give steel superior stiffness compared to softer structural metals. Rubber exhibits low elastic modulus values, undergoing large reversible deformations under minimal applied stress levels. Elasticity measures a material's ability to return to its original shape after the removal of applied mechanical stresses. Young's modulus quantifies the relationship between tensile stress and axial strain within the linear elastic deformation range. High-strength structural steels typically maintain a constant modulus of elasticity around two hundred gigapascals.
Option A represents rubber, which features extremely low stiffness and high compliance rather than structural elasticity. Option B denotes plastics, which generally exhibit much lower elastic moduli and higher susceptibility to creep deformation. Option C represents brass, which is softer and less stiff than high-grade structural steels.
- Subject
- Engineering
- Category
- Mechanical Engineering
- Topic
- —
- Difficulty
- medium
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