I was wondering if anyone can give me a proper definition of yield stress?

Question

The thing that is confusing me is if yield stress is the same as the yield point yield point? My current understanding of yield stress is it's the range at which a material have elstic properties whereby the material would return to its original shape even if a force is applied. However I believe that if I answered a exam question like this it would not be correct as I have not applied stress part into it.

Answer 1

The pressure which a substance is capable of supporting without fracturing. The yield stress is typically 10.-3 to 10.-2 times the shear modulus. In industry, yield stresses are usually not even approached because the applied stresses are kept well below the yield stress by a safety factor on the order of 1.5 to 2.0.

Answer 2

Sir what is this question doing in health section.

Yield strength, or the yield point, is defined in engineering and materials science as the stress at which a material begins to plastically deform. Prior to the yield point the material will deform elastically and will return to its original shape when the applied stress is removed. Once the yield point is passed some fraction of the deformation will be permanent and non-reversible. Knowledge of the yield point is vital when designing a component since it generally represents an upper limit to the load that can be applied. It is also important for the control of many materials production techniques such as forging, rolling, or pressing


But as this question is put - in health section

Stress is bodys way to response to a demand - body is alerted to deal a particular emergency - which produce physical, hormonal, emotional changed - in body. So if this is constant and frequent this alerted situation harm the body and produce many disease cont ion like migraine, ulcers, acidity etc

Answer 3

This is a mental health form, not physics!