Stress Concentration Factors of Cast Surfaces
Stress Concentration Factors of Cast Surfaces
(OP)
What is the SCF of a normal Sand Cast Alu surface? How would you apply that SCF to your calculated (from FEA) stresses?? This is a fatigue loading, and SCF will have a significant impact on Fatigue Life.
Thanks
Bernt
Thanks
Bernt





RE: Stress Concentration Factors of Cast Surfaces
Edson Campos
edsoncampos@earthlink.net
RE: Stress Concentration Factors of Cast Surfaces
While I don't have an answer for SCF, I do know that aluminum is frequently used in fatigue calculations (though not as much as steel, as it has not historically been studied as much for fatigue properties).
Just because one cannot find something in a particular book does not delegitimize it. There are sources for this type of information.
Bernt, I'm incommunicado for two weeks, so I won't be able to give you any specific answers. However, I would encourage some searches in the literature, and a talk with an aluminum manufacturer's rep, if you know any.
Also, look into some of the fatigue software companies--Safe Technologies, MSC/Fatigue, LMS. They may be able to provide you with some material properties and details that are included in their products. That may give you a good start.
They should be able to help you.
Good Luck
RE: Stress Concentration Factors of Cast Surfaces
If you read my posting a little more closely, you will note that I make a distinction between "CAST" and "Wrought" Aluminum. Of course Aluminum can be used for fatigue apps., but a Cast aluminum structure is probably not a good idea for a fatigue app. I merely informed "Bernt" that there are no S/N curves for cast aluminum in MIL-HNDBK-5 which usually lists all these properties for materials that have a history of being used for that type of application.
Edson Campos
edsoncampos@earthlink.net
RE: Stress Concentration Factors of Cast Surfaces
RE: Stress Concentration Factors of Cast Surfaces
Look under the bonnet (hood) of most cars and start counting the applications.
Cheers
Greg Locock
RE: Stress Concentration Factors of Cast Surfaces
Regards
Bernt