"Ned Simmons" wrote in message
...
On Thu, 23 Feb 2012 16:29:41 -0500, "Jim Wilkins"
wrote:

That .2% is the amount of non-elastic stretch used to define the
yield
point; it's not the amount of elastic deformation before yield. The
suggestion was to measure *elastic* strain (delta length/length) in
order to determine tension. The change in length before yield will
be
approx = stress/Young's modulus x length, stress equal to
tension/area. Still a small number.

--
Ned Simmons

If Young's Modulus is 30E6 and the load is 30E3, what's the
elongation?

jsw