1
$\begingroup$

I want to know the Young's modulus for a compressive test, but I have just a tensile test. Are they of the same value?

$\endgroup$
1
$\begingroup$

For a linear isotropic Hookean material, the Young's modulus of elasticity is the same for compression and tension.

$E = \frac{\sigma}{\epsilon}$

where $E$ is the Young's modulus, $\sigma$ is the normal stress and $\epsilon$ is the normal strain.

$\endgroup$
0
$\begingroup$

The equivalence is derived here, for example. Briefly, any smooth energy minimum examined up close looks like a parabola, which is symmetric around the equilibrium point. A parabolic strain energy corresponds to a linear restoring force (corresponding to Hooke's Law) and a constant stiffness in both tension and compression.

$\endgroup$

Your Answer

By clicking “Post Your Answer”, you agree to our terms of service, privacy policy and cookie policy

Not the answer you're looking for? Browse other questions tagged or ask your own question.