Re: Composites

MIL-HNBK-17 would be a good source for both micro-mechanics models for
lamina properties and laminated plate theory.

-wade

"Matt Oliverius" <[EMAIL PROTECTED]> wrote in message
news:[EMAIL PROTECTED]
> Hi all,
>
> I am trying to calculate composite moduli for a (45/45/45/45) laminate in
1
> degree increments from 0 to 360 degrees.  However, the equations I am
> finding in textbooks are undershooting the modulus.  For example suppose
my
> fiber modulus (E) is around 20MSI and my matrix modulus (E) is 1 MSI.
Then
> when I plug theta of 45 into a transformation equation (assuming 0 is the
L
> direction of the composite), then I come up with a modulus of 2MSI, when
it
> should be around 20MSI.  Does anyone know what might be wrong?  Is there
an
> assumption about the stackup in these equations that I might be missing?
> If so, where can I find references to the generalized solution E =
f(theta)
> for any stackup?
>
>