[CAUT] Breaking strengths / percents

[Alan McCoy]

Ric,

Maybe this will help. From the Pure Sound site. Click on Wire Data.

http://www.puresound-wire.com/

Alan


> From: Ric Brekne <ricbrek at broadpark.no>
> Reply-To: "College and University Technicians <caut at ptg.org>" <caut at ptg.org>
> Date: Wed, 31 Jan 2007 23:42:31 +0100
> To: caut <caut at ptg.org>, pianotech <pianotech at ptg.org>
> Subject: [CAUT] Breaking strengths / percents
> 
> Hi folks
> 
> I'm looking at how to compensate for use of pure sound wire in
> spreadsheets for calculating scales.  I have the Tension bit figured
> out, but I am unsure of how to deal with breaking tension and % of that.
> 
> Roberts gives a simple 0.557*d^1.667  (d in mils) and result in lbs.
> 
> This is for steel wire with an average density of 7.85 gm /cm^3 and an E
> modulus of 192 kN/mm2
> 
> Pure sound has an average density of 7.87 and an E modulus of 187.5
> 
> What I need to know is what the formula for % breaking strength for pure
> sound is.
> 
> Any help to get out there ?
> 
> Cheers
> RicB
>