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Re: Epoxy: To Bias or Not To Bias?
By:Shawn Baker
Date: 5/23/2003, 10:52 am
In Response To: Re: Epoxy: To Bias or Not To Bias? (Greg Morse)

: Aside from enhanced draping, there may be some strength gain from having more
: fibers crossing joint lines. If you lay the cloth parallel with the joint
: lines, only half of the fiber bundles cross at 90 degrees. On the bias,
: all the bundles cross at 45 degrees. This may apply more to S & G
: chines and strip hull-deck joints.

If you "do the math", and figure out how much strength is lost by crossing the strips at an angle, it doesn't quite add up. At 45º, there is only 70.7% the original strength at 90º. It drops quickly at higher angles...however, I don't think this is a huge issue, and shouldn't keep you from glassing at a bias.

We get more damage from sharp rocks and small point loads (where s-2 or satin glass could help more) than we do large scale destruction where strength of glass spanning strips is critical. Sage and Robert are the only ones I know of who have tested boats to this limit!

Just don't plan on higher strength as justification for glassing on a bias.

Shawn

Messages In This Thread

Epoxy: To Bias or Not To Bias?
Grant -- 5/23/2003, 12:00 am
Re: Epoxy: Good luck to you Grant
Scott Ferguson -- 5/23/2003, 6:49 pm
Epoxy, Beverages and Tunes
Grant -- 5/23/2003, 7:16 pm
Re: Epoxy: To Bias or Not To Bias?
srchr/gerald -- 5/23/2003, 11:42 am
Re: Epoxy: To Bias or Not To Bias?
Grant -- 5/23/2003, 11:45 am
Re: Epoxy: To Bias or Not To Bias?
srchr/gerald -- 5/23/2003, 5:33 pm
A Simple Bias
Grant -- 5/23/2003, 5:57 pm
Re: Epoxy: To Bias or Not To Bias? *LINK* *Pic*
Charles Leach -- 5/23/2003, 10:59 am
Re: Epoxy: To Bias or Not To Bias?
Greg Morse -- 5/23/2003, 9:12 am
Re: Epoxy: To Bias or Not To Bias?
Shawn Baker -- 5/23/2003, 10:52 am
Bias Fit?
Grant -- 5/23/2003, 11:08 am
Re: Bias Fit?
Shawn Baker -- 5/23/2003, 3:18 pm
Re: Epoxy: To Bias or Not To Bias?
Dan G -- 5/23/2003, 8:31 am
Re: Epoxy: To Bias or Not To Bias?
DAVE SPRYGADA -- 5/23/2003, 7:13 am
Re: Epoxy: To Bias or Not To Bias?
LeeG -- 5/23/2003, 12:34 am