- #1
Tehniyat
- 2
- 0
For brittle substances can we say that elastic limit is equal to fracture stress ?
Physics of Solids: Elastic Limit & Fracture Stress
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Discussion Overview
The discussion revolves around the relationship between elastic limit and fracture stress in brittle substances, exploring whether they can be considered equivalent. Participants also touch upon the concept of ultimate tensile strength (UTS) in the context of brittle materials.
Discussion Character
- Debate/contested
Main Points Raised
- One participant questions if the elastic limit is equal to fracture stress for brittle substances.
- Another participant suggests that while they are closer together in brittle materials compared to less brittle ones, they should not be considered the same.
- A different participant reiterates the idea that brittle substances may have an ultimate tensile strength (UTS).
- One participant agrees that it is possible to say they are similar but emphasizes the importance of precision, noting that brittle materials do have a yield point that occurs after the elastic limit, albeit with minimal plastic deformation.
Areas of Agreement / Disagreement
Participants express differing views on whether the elastic limit and fracture stress can be considered the same, with some arguing they are close but not identical, while others affirm the existence of a yield point in brittle materials.
Contextual Notes
There are unresolved questions regarding the definitions of elastic limit, fracture stress, and UTS, as well as the implications of yield points in brittle materials.
- #2
BvU
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Hello Tehniyat,
Safer to say that they are closer together than with a less brittle substance.
Safer to say that they are closer together than with a less brittle substance.
- #3
Tehniyat
- 2
- 0
BvU said:Hello Tehniyat,
Safer to say that they are closer together than with a less brittle substance
Do brittle substances have UTS ?BvU said:Hello Tehniyat,
Safer to say that they are closer together than with a less brittle substance.
- #4
BvU
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Sure, why not ?
- #5
Ali Durrani
- 55
- 5
yes you can say but to be more precise its not good to say that they both are same, because even brittle materials have a yield point which lies after elastic limit but that plastic deformation in the yielding range is too small, usually in microns, so we ignore it, that is why its not good to say that elastic limit and UTS are same because you can't ignore the yielding which lies in between them.
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