I was trying to get a value for elastic modulus for 316L stainless steel material from internet, and I saw a brochure online which was giving two different values for elastic modulus, one in tension and one in torsion. I was confused why this is the case?
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$\begingroup$ Can you provide the link to the online brochure? $\endgroup$– r13Commented Jun 24, 2021 at 12:59
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$\begingroup$ There are many elastic moduli: Young's (axial), shear (torsion), bulk (volumetric), biaxial, plane-strain, P-wave, complex... $\endgroup$– ChemomechanicsCommented Jun 25, 2021 at 3:04
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Probably the value for the torsion related modulus for 316L should be close to 79[GPa], compared to 200-210 [GPa] for tension.
The shear modulus for isotropic materials can be analytically calculated as
$$G = \frac{E}{2\cdot(1+\nu)}$$
where:
- G is the shear modulus
- E is the tensile modulus
- $\nu$ is the Poisson's ratio.
You can see a derivation in the following link (University of Auckland)
