Resonant Dwell Fatigue Testing.....

[NickE]

I'm looking for good references for any information on (title) specifically regarding high strength steels (260ksi+ UTS)either stainless (400 series, 17-7, etc.) or Carbon. The specimens are generally simple cantilever beams.

The machine I am using is a very old (b/p ~1971) Unholtz Dickie ocillator/servo programmer, resonant dwell controller, counter, power amp, and 50lbs shaker. I was able to re-calibrate teh controller and get much more consistancy in the measured tip displacement. I still am having difficuty removing drift in the system though.

It is becoming difficult to secure confidence in the data due to very large variations test to test.


Thanks
nick

 

[metengr]

Nick;
Are you looking for a test procedure or actual test data for these materials?

 

[NickE]

Test procedure and theroy. Also hints on fixturing and instrumentation. We like this type of testing for comparision between competing production processes.

I have a decent idea of how this works, I am just looking for as much info as possible to assist my research.


Nick
I love materials science!

 

[metengr]

Possibly some useful information below or contacts to pursue further information;

http://www.qualitest-inc.com/testronic.htm

http://www.tiniusolsen.com/tmech.html

Some theory and testing;

http://www.ifm.mavt.ethz.ch/research-98/pdf/impact.pdf

I found that the Tinius Olsen folks were always very helpful and resourceful for just about any kind of tests on materials.