Stress strain diagram of mild steel -- gauge length made half

[Ravi Singh choudhary]

All we know the usual stress strain diagram obtained from tensile test from universal testing machine. As modulus of elasticity is material property that means till proportional limit slope will not change. As it is not a force vs elongation curve that means there will be no re-scaling to be done till proportional limit. As the gauge length is made half that means average number of voids made half. Consequently it will show some variation in yield point region.

No clue for: (i) region between proportional limit and elastic limit
(ii) necking
(iii) slopes between yield point - ultimate stress point - fracture point
Why ultimate stress and fracture stress coordinate would be same even after this new gauge length?

 

[Illmatic1]

The ultimate stress and fracture stress coordinates will remain the same even after changing the gauge length because the ultimate strength of a material is not affected by the gauge length, but rather by its properties such as composition, heat treatment and microstructure. The fracture stress coordinate is a measure of the maximum load that the material can withstand before it breaks. Therefore, it remains unaffected by the gauge length change.