RE: Torque Meter Question

From: John Barker <john.barker783_at_ntlworld.com>
Date: Mon, 15 Oct 2007 22:27:59 +0100

Cal
If my memory is not playing tricks after all these years then the equation
you require is:

Stress = modulus of rigidity x angle of twist x radius of wire / length of
wire.

modulus is usually about 11.5 x 10^6 lb/sq.in
angle of twist = 2 turns = 4pi radians
radius of wire = 0.0075 in.
length of wire = 125 mm = 4.92 in.

I make that to be a stress of near 220,000 lb/sq.in = 98 tons/sq.in.

To my mind that pushing it even though you colonials always claim to have
better steels than us oldies.




[Non-text portions of this message have been removed]
Received on Mon Oct 15 2007 - 14:28:07 CEST