Question

A test specimen is stressed slightly beyond yield point and then unloaded. Its yield strength decrease or increase?

Answer 1

Explanation:

Hello...

A straight line is drawn through Point (D) at the same slope as the initial portion of the stress-strain curve. The point of intersection of the new line and the stressstrain curve is projected to the stress axis. The stress value, in pounds per square inch, is the yield strength.

@hardikrakholiya21

_________________________

❤️

Answer 2

Additional stress is necessary to overcome the carbon's resistance, at which point everything can progress uninterrupted, which means that the material can then persist to give "at a lower stress". So, the upper stress is momentary. Once which is overcome, the "yield stress drops" to the below value.

Explanation:

• A straight line is drawn over Point at the same slope as the first part of the "stress-strain curve".
• The point of junction of the 'new line' and the 'stress strain curve' is projected to the axis of stress.
• The stress value, in "pounds per square inch", is the 'yield strength'.

To know more:

Determination of grain diameter and yield strength as function of time

https://brainly.in/question/12029687