Fatigue Design and Evaluation Committee 

--To: SAE FD&E members interested in life prediction of welded structures

Weld Challenge 2

(How good are you with a Real history?) Updated 3/2/04

Here are the parameters for the weld challenge. Two variable amplitude load levels, using the grapple skidder torque history will have been run by the time of the next meeting.

First test:

19.2 times the loads in load file

(resulting peak load = 6106lbs).

We have at least two tests done.

Second test:

27.1 times the loads in the file.

(resulting peak load = 8618lbs).

Pete and I (John Bonnen hope to have two tests (his will probably

be done -- I'm not sure my test frame can stand the 8618lb max loads.

The brace broke near the end of the last test.)

Load history location:

http://fde.uwaterloo.ca/Fde/Weld2/grpltorWeld.html

Details and a brief discussion showing the test piece fixturing (contraint) during testing can be found at

http://fde.uwaterloo.ca/Fde/Weld2/testgeom.html

Incidentally, calibrating the "model" that you have to the previous results from Weld Challenge 1 is considered poor sportsmanship. One should make predictions without consideration of the error between one's prediction and previous results.

Thanks,

John J. Bonnen

mailing: Ford Motor Co.

ph. (313) 322-9127 MD3135 SRL

fx. (313) 390-0514 P.O. BOX 2053

Dearborn, MI 48121-2053

email: jbonnen(at)ford.com

Thanks,

John J. Bonnen

mailing: Ford Motor Co.

ph. (313) 322-9127 MD3135 SRL

fx. (313) 390-0514 P.O. BOX 2053

Dearborn, MI 48121-2053