Peter Cole wrote:
"Metal Fatigue in Engineering", Ralph I. Stephens, Ali Fatemi, Robert R.
Stephens, Henry O. Fuchs, Ali Faterni
http://www.amazon.com/gp/reader/0471...08#reader-link


Page 247-8 describe creation of beneficial residual stress at a notch by
overloading in tension, whereby the stress concentrating effect of the
notch brings the material above yield in the immediate notch vicinity,
followed by a residual compressive stress when the overload is relaxed.
The undesirable residual stresses created by bending to form parts (skin
tension caused by forming compression) are also mentioned.

Page 257 describes stress relieving via yielding.

Page 259 describes modifying residual stress by overloading:

"In springs, as in other parts that are primarily loaded in one
direction, an overload applied early in life is beneficial because it
introduces desirable residual compressive stresses at the proper
surface. Springs, hoists and pressure vessels are strengthened by proof
loading with a higher load than the expected service load"

see previous post.

existence of residual stress does not mean it causes spoke fatigue.
simple observation shows the truth. spokes are not observed to have
their cracking initiate in regions of high residual stress, but in
regions of high applied stress. as one might expect given that spoke
elbows, by definition, are subject to bending as a function of being
offset from the spoke axis.

simple observation of the facts. i suggest you try educating people on
basic scientific method rather than leaping to conclusions. or trolling.