Question

28: Engineering stress-strain curve and True stress
strain curve are equal up to​

Answer 1

Answer:

The theory says upto Elastic limit, true stress-strain and engineering stress-strain curve are APPROXIMATELY same.

In the formula:

true strain=Ln(1+engg strain);

since in the expansion of log we are neglecting the higher order terms of engg strain, in case of lower strain that typically yields the same value of slope(Young modulus.)

But precisely in my compression test the E(true stress-strain)=1530MPa and E(engg stress-strain)= 1606.3MPa.

Explanation:

please follow me

Answer 2

The concept says that as much as the Elastic limit, true stress-strain and engineering stress-strain curves are about same.

Explanation:

• True pressure is the implemented load divided through the real cross-sectional region (the converting region with time) of material.
• Engineering stress is the implemented load divided through the authentic cross-sectional region of the material.

In the formula:

• True stress=Ln(1+engg strain);
• When you consider that withinside the enlargement of the log, we're neglecting the better order phrases of engg strain, in case of decreased strain that generally yields the identical value of slope(Young modulus.)
• But exactly in my compression take a look at the E(true pressure-stress)=1530MPa and E (Engg stress-strain)= 1606.3MPa.

#SPJ2