> That's not a true statement. Failure happens when you go into plastic
> deformation.
Nolan, all I can say is STAY AWAY FROM MY CARS !
> That's why your cars springs sit there going "boing boing" without snapping.
Maybe yours do ... the springs on my TR3 were broken when I got it and many
people on this list have experienced plastic deformation of springs (sagging).
As any ME will tell you, most metals still have a fatigue life even with small
amounts of flexing. It's much longer than the life under plastic deformation,
but it still exists and has a limit. The alloy can be optimized for long
fatigue life ("spring" steel) but it still fatigues.
http://en.wikipedia.org/wiki/Metal_fatigue
Randall
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