Re: [PSUBS-MAILIST] Re: Fiberglass

["Dan J. Rice" <dan.j.rice@sherwin.com>]

The better designation would be FRP, fiber reinforced plastics, and as you say
there are different types.  One that has been used in high speed hulls is
Kelvar.  Compression characteristics would definitely concern me, (that's one
reason I thought Ferro cement would be a good choice).  A combination of
materials, FRP's and steel, as Michael mentioned,  or maybe some composite
materials, high tech ceramics.

Layup is also critical.  Delamination can occur if the layup is not done right.
This would be much more evident at depth than on surface vessels.

Dan




Michael B Holt <michaelbholt@juno.com> on 01/16/2000 09:00:27 PM

Please respond to personal_submersibles@psubs.org

To:   personal_submersibles@psubs.org
cc:    (bcc: Dan J. Rice/EST/Sherwin-Williams)

Subject:  [PSUBS-MAILIST] Re: Fiberglass



On Sun, 16 Jan 2000 19:28:47 -0600 "Greg Teiber" <wolfe19@megsinet.net>
writes:
>I have always had concerns about fiberglass's compressive strength.
>in fact, it concerns me greatly.  I'd like to see some data on
>fiberglass's strength :)

I would, also.

I don't recall seeing any of that.   That's why the comments in those
two books are so intriguing: there's no obvious support for it.

I'll do some research.

Other than compressive strength, what would you like to know?

However, it appears to me that even if we have quantitative
data on fiberglass, a lot of its characteristics are controlled
by the resin, the quality of layup work and the type of glass
mat.





Michael B. Holt                                Oregon Hill, Richmond,
Virginia, U.S.A.
                "There's gotta be an excuse for some of this."
--

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