-----Original Message-----[some format changes by moderator]
From: Chernenkoff, Russell
Sent: Thursday, September 02, 2004 8:26 AM
Subject: SAE FD+E Weld Challenge 3 for Oct. 2004 Meeting
Importance: High
--To: SAE FD+E members interested in life prediction of welded structures
Weld Challenge 3
Prediction Challenge 3A:
Paul Lubinski has kindly provided us with our latest
challenge, this one involving an exhaust tube welded to
a hanger. Please see the fatigue.org website for details:
http://www.fatigue.org/Weld/Challenge-3/FDE_weld_info_hanger.ppt
or a Back-up Copy
This document contains everything you should need: drawings and picture
of the test piece, material, constraint conditions, load application
geometry, and the four different fully reversed load levels tested.
The tests were conducted at room temperature, and the exaust tube
and weld filler is 409 stainless while the wire is cold rolled
SAE 1008/1010. All this, and more, are already in the file.
The challenge is, again, to both predict the fatigue life and failure
location on the test piece.
Material
The pipe material is a 409 Stainless steel. The hanger rod material
is SAE1008/1010 cold rolled steel.
Crack Initiation:
Strain controlled ASTM E606 axial specimen test results for 409 stainles
can be found at
https://fde.uwaterloo.ca/Fde/Materials/SSteel/AISI_409_stainless/aisi409.html
Information for materials similar to cold rolled SAE1008/1010 can be
found at
https://fde.uwaterloo.ca/Fde/Materials/Steel/Lowcarbon/lowcarbon.html
Geometry
Details available here:
http://www.fatigue.org/Weld/Challenge-3/FDE_weld_info_hanger.ppt
or a Back-up Copy
Load History
A total of 16 specimens were tested to totally reversed (R=-1)
constant amplitude load control input
at load levels:
4 specimens at +- 1023 N amplitude
4 specimens at +- 845 N amplitude
4 specimens at +- 689 N amplitude
4 specimens at +- 578 N amplitude
Test Results
# Experimental test results
# R= -1.0
Load Ampl.(N) Experiment Cycles to Failure
------------- --------------------------
1023 72,000 +/-52,000
845 390,000 +/-240,000
689 1,110,000 +/-120,000
578 3,000,000 +/-1,000,000
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