For which material does Poisson’s ratio exceed a value of one_________________?
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Answer: E. none of the above
Explanation
Standard engineering structural metals consistently exhibit Poisson ratio values well below one during elastic deformation phases. Theoretical limits for isotropic elastic materials restrict Poisson ratio values between negative one and positive zero point five. Common ductile metals like steel and aluminum show lateral strain contractions that are roughly one-third of their longitudinal extensions. Poisson ratio is the fundamental mechanical property defined as the negative ratio of lateral strain to longitudinal tensile strain. Isotropic materials maintain uniform elastic properties in all orientations under applied external mechanical loads and stress states. Advanced composite materials and specific cellular structures can exhibit unconventional mechanical behavior, but standard metals do not.
Steel exhibits a typical Poisson ratio of approximately zero point three, which is significantly lower than a value of one. Copper possesses an elastic Poisson ratio near zero point three four, confirming it falls far below the unity threshold. Aluminium displays standard elastic contraction behavior with Poisson ratios hovering around zero point three three across common grades.
- Subject
- Engineering
- Category
- Mechanical Engineering
- Topic
- —
- Difficulty
- medium
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