Re: [PSUBS-MAILIST] Re: Fiberglass

["Greg Teiber" <wolfe19@megsinet.net>]

The lack of consitancy is also a BIG concern.  In a given layup, you may have strngth vary by as much as 50%. (note that 50% is a number pulled out of the air..  Delamination can be extremely hazadous to your health and you can't see it after the hull is built. )  Hell in the boat industry a given hull while still structually sound, is EXTREMELY likely to have at lest some cracks and often times leaks into the substrate materials.  Basicly if I were to go down in a sub it's gonna be of some uniform material.  Even concrete is a better choice when compared to the traditional steel. At least concrete/cement is uniform in it's strength.  And 100% repeatable.

*********** REPLY SEPARATOR ***********

On 1/16/00, at 9:00 PM, Michael B Holt wrote: 

>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."
>--
>
>________________________________________________________________
>YOU'RE PAYING TOO MUCH FOR THE INTERNET!
>Juno now offers FREE Internet Access!
>Try it today - there's no risk!  For your FREE software, visit:
>http://dl.www.juno.com/get/tagj.