Where does the tensile strength locate?

[aiklone1314]

Hi,
i read my online note, it state that yield strength is stress at which noticeable plastic deformation has occurred but why when i see the graph, it doesn't means like what it written.
below is the graph make me confusing.

 

[heylouis]

Hi,
i read my online note, it state that yield strength is stress at which noticeable plastic deformation has occurred but why when i see the graph, it doesn't means like what it written.
below is the graph make me confusing.

Except mild steel the yield point is difficult to find. So people usually define that the stress at 0.2% inelastic strain is yield strength.
You can find the 0.2% inelastic strain position is drawed specially in the graph, that's the reason. And, 0.2% inelastic strain is noticeable in industry use.
It is 0.2% inelastic strain but not 0.0% because elastic deformation do not fully agrees to Hooke's law. The elastic deformation near yield stress is not linear. So 0.0% is not a proper value.

 

[oswaler]

I can explain that the tensile strength is the maximum stress a material can withstand before breaking or rupturing. It is typically located on a stress-strain curve, which plots the relationship between the applied stress and the resulting strain of a material. The point at which the curve starts to deviate from a linear relationship is known as the yield point, and this is where plastic deformation begins to occur. However, it is important to note that the yield strength and tensile strength are not always the same. The tensile strength is the ultimate strength of a material, meaning the maximum stress it can withstand before breaking, while the yield strength is the stress at which plastic deformation begins. This is why the graph may not match exactly with the written definition. It is also worth noting that the tensile strength can vary depending on factors such as the composition and processing of the material.