What stress level is reached at the point of tensile fracture__________?
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Answer: A. Breaking stress
Explanation
Breaking stress is the nominal stress recorded at the exact moment of rupture or tensile fracture of the test specimen. This value represents the final force reading divided by the original cross-sectional area right when the material separates. It marks the ultimate conclusion of a standard tensile test after the specimen has undergone extensive plastic elongation. Tensile testing records continuous load and elongation data to map the complete mechanical behavior of engineering materials. Nominal stress calculations always reference the initial undeformed cross-sectional area of the test bar. The breaking stress typically falls below the peak ultimate tensile stress due to area reduction during localized necking.
Fracture stress typically refers to true stress calculated using the actual reduced area at the moment of separation. Yield point stress marks the onset of permanent plastic deformation rather than the final tensile fracture point. Proof stress is a specified stress value used to determine a non-proportional elongation limit for materials lacking a distinct yield point.
- Subject
- Engineering
- Category
- Mechanical Engineering
- Topic
- —
- Difficulty
- medium
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