fatigue data parameters
fatigue data parameters
(OP)
Hello,
Does anybody have a source for finding fatigue strength and fatigue ductility coefficients and exponents.
Thanks
Does anybody have a source for finding fatigue strength and fatigue ductility coefficients and exponents.
Thanks





RE: fatigue data parameters
Quando Omni Flunkus Moritati
RE: fatigue data parameters
RE: fatigue data parameters
to run. Many of the nCode supplied constants come from the FDE Comm.
where Bruce Boardman from J.Deere compiled sets of constants for
common materials. He published a table in an SAE paper. or J1099(?)
Results were from literature, steel suppliers, etc
of batch tests. Some material sets are also found here:
http://fde.uwaterloo.ca/Fde/Materials/dindex.html
Another source are a set of books by A.Baeumel Jr and T.Seeger e.g.: ISBN 0 444 41685 4
with a corrections book at ISBN 0 444 88603 6 Publisher is Elsevier.
Be warned that the parameters are from a least sq. fit process and do not
always fit the data. Whenever possible you should always plot the test
data points and the "fit" curve to see if it applies in the life region you are
interested in and to find where extrapolation has occurred.
Also be warned that when you have a mixture of small cycles interspersed
with occasional large load cycles that you can get damage by cycles below
the fatigue limit.
RE: fatigue data parameters
I also reccommend to use the fatigue properties database created and managed by Darrell Socie: www.efatigue.com . There are dozens of material properties registered and also a fatigue calculator (that I think is a valuable feature) for S-N, eps-N or Crack Growth Method. It's very valuable.
Last but not least, there also is the fatigue database of Jan Papuga website: http://www.pragtic.com/vmat.php . This is the database that is inside of the PragTic Software.
Chears
RE: fatigue data parameters
Doug
RE: fatigue data parameters
AISI has tested about 120 sets of various bar steels for shafts,
gears etc, including differing heat treat and carburizing methods:
http://barsteelfatigue.autosteel.org/login_bar.asp
There seems to be another at TH Darmstadt which is probably related to the
Seeger books but I don't know anything about it yet:
http://www.wm.tu-darmstadt.de/mat-db/search.php