Shear Modulus Estimation
Shear Modulus Estimation
(OP)
Hi, I would like to work out the shear modulus based on the test data given by supplier before placing order.
Is it reasonable to use the shear modulus formula G = E/ 2(1+V) for estimating shear modulus?
Thank you!
Is it reasonable to use the shear modulus formula G = E/ 2(1+V) for estimating shear modulus?
Thank you!

RE: Shear Modulus Estimation
RE: Shear Modulus Estimation
In-plane shear modulus for most carbon/epoxy materials is ~ 0.6 Msi at RTA. See CMH-17 Volume 2.
RE: Shear Modulus Estimation
Even if it is fabric which the properties in fill and warp directions are about the same, we also cannot assume it is isotropic materials to use the shear modulus formula?
RE: Shear Modulus Estimation
RE: Shear Modulus Estimation
RE: Shear Modulus Estimation
RE: Shear Modulus Estimation
RE: Shear Modulus Estimation
For the properties in thickness direction, we assume transverse isotropic but the table below shows that E3 /= E2 ... Should I assume E3 = E2 based on the assumption of transverse isotropic?
Courtesy: Design, Manufacturing and Applications of Composites: Proceedings of the Ninth Joint Canada-Japan Workshop on Composites; Kyoto Institute of Technology, Kyoto, Japan July 2012
RE: Shear Modulus Estimation
For fabric, E3 is not = E2 (much lower; use E2 for tape with same resin)
RE: Shear Modulus Estimation
From '10.2.4.1 3-D lamina property determination' in MIL-HDBK-17-3F, I do notice the material properties given are unidirectional for illustrating the transverse isotropy.
I only have 2D data for running FEA. Is there any assumption we can make if no experimental data available?
RE: Shear Modulus Estimation
Post the specific material you are using and the property values you have.
RE: Shear Modulus Estimation
I usually use 2D properties with pcomp in nastran but I am now using ansys which no 2d orthotropic material card.
I only have the table below from Toray website.
RE: Shear Modulus Estimation
RE: Shear Modulus Estimation
Datasheet: https://www.toraycma.com/wp-content/uploads/T800H-...
Related thread: https://www.eng-tips.com/viewthread.cfm?qid=495675
*I should have created one thread for all the questions... hmmm
RE: Shear Modulus Estimation
Kind of hard to do an analysis if you don’t know what the material is.
RE: Shear Modulus Estimation
RE: Shear Modulus Estimation