how to det. lifespan of a part

[alwaysdrunk]

Hi,


I wanted to have our test laboratorytransfered tomy PC using mechanica.Instead of making actual tests,I want to have a virtual test allowing me to determine the maximum life of a part being subjected to stress. Is this possible? I heard fatigue analysis will do. Please help. thanks

 

[Ray Ellender]

Yes, but.. - Only if you know what you are doing, have apprropriate material data, know how to do some careful post-processing, or possibly also have Fatigue Adviser, or another code like n-Code.


Asking may be the rule in your kingdom, but a little knowledge is a dangerous thing. I thinkyou should letthe test laboratory continue until you are 'alwayssober'

 

[ankarl]

Fatigue Advisor is a very limited version of ncode's software (used by PTC under license). To elliminate testing completely (which I dont believe is possible under my lifetime) fatigue advisor wouldn't be enough.
Also as Ray said you depend a lot on the material models. If its Steel or aluminium they have come far but when it comes to cast iron or composite materials theres a long way to go yet.

 

[alwaysdrunk]

Hi ray Ellender,


Of course i know what I'm doing (in the lab that is) and i just want an additional or should I say a secondary check to what my tests says with mechanica. I would be glad if you could give me any idea on how to do fatigue analysis.


I agree, little knowledge is dangerous indeed but still asking makes "little" grow "bigger" making it less dangerous...when are you going to ask?when you're in trouble?...That is why we are here in this forum right?


"If you have nothing good to say, don't say anything"- it makes the world a perfect place to hang on.