What does it signify when a structural member is described as elastic under applied loads________________?
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Answer: C. stretch
Explanation
An elastic structural member deforms and stretches under applied loads while retaining the ability to spring back entirely. Elastic behavior means that atomic bonds stretch temporarily without suffering permanent displacement or irreversible plastic deformation. Upon removing the external load, the stretched structural member immediately recovers its exact original shape and dimensions. Elasticity is a fundamental mechanical characteristic that allows materials to store mechanical energy safely during temporary loading. Hooke law governs this elastic stretching behavior by establishing direct proportionality between applied stress and resulting strain. Exceeding the elastic limit causes the structural member to lose its complete recovery capability and undergo permanent deformation.
Stating that an elastic member will not deform is incorrect because all loaded elastic structures experience measurable stretching. Safety is a design outcome rather than a direct physical definition of what an elastic material does under load. Stating that the member will not stretch ignores the fundamental definition of elastic deformation under applied tensile loads.
- Subject
- Engineering
- Category
- Mechanical Engineering
- Topic
- —
- Difficulty
- medium
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