Getting the in-plane shear modulus G12 of a weave composite...

[HarambeWasAnInsideJob]

Hey guys, I'm trying to get G12 of a cured composite. The fibers are weave, so is there a special formula I can use to find G12 (Huber's Formula?).. or is it only determined experimentally. Let's assume there's no data sheet for the material, and currently I have E1 (which equals E2) and poissons...

 

[aerostress82]

From what I remember in my composite materials master's course 10 years ago, I believe you need to get it experimentally. It is not isotropic material anymore..

Spaceship!!
Aerospace Engineer, M.Sc. / Aircraft Stress Engineer

 

[SWComposites]

There is no formula.

However, the G12 for most carbon fiber epoxy composites (uni tape and fabrics) at room temperature is ~ 0.7 msi

 

[HarambeWasAnInsideJob]

@SWcomposites sorry for posting in more than one place..

Do you have a source for G12 being roughly .7 msi?

 

[SWComposites]

CMH-17

(and 30+ years experience)