How to determine G12 if I have E1, E2 and v12?

Fea_pather · Jul 10, 2025

I intend to work with Composites in my simulations. I have a rough idea of the E1, E2 and the v12 properties I wish to use. With this, is it possible to predict the G12 (in-plane shear modulus) that should be defined in the FEA simulation to ABAQUS? Is there a method similar to the isotropic scenario, like G = E / 2 (1+v)???

Note: I intend to use a Plane stress formulation with Lamina material properties.

FEA way · Jul 10, 2025

Check this thread: https://www.eng-tips.com/threads/calculation-of-shear-modulus.295070/

SolidWorks uses G_xy = (E_x*E_y)/(E_x+E_y+2*E_y*v_xy) if you don’t specify the shear modulus.

SWComposites · Jul 11, 2025

1 do not double post
2 SolidWorks eqn is rubbish

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How to determine G12 if I have E1, E2 and v12?

Fea_pather

Automotive

FEA way

Mechanical

SWComposites

Aerospace

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