Material defect

[sylwcios]

Hi guys,
Does someone has experience in modelling a material defect as shown on the photo. My boss asked me if it's possible to model such a defect and check its impact.
Do you konow if there is a possibility to model such a thing in femap and how to do it (we have basic license) or if there is even a sense to model this.

Thank you for any reply!

 

[Worldtraveller]

I have seen very high fidelity crack growth models, but I don't think you can do something like that with basic FEMAP/Nastran. (I could be wrong.)

The only reasons to model something like that are 1)to show that it is good to use, or to use with a limited life; or 2) it has failed and someone wants to make the lawyers happy?

I think trying to use a part like that with such a obvious defect is probably a bad idea unless it is really lightly loaded and won't matter if it fails.

That's what scrap piles are for.

If you know the stresses on that part, you can find a stress concentration approximation using Peterson's and that will probably give you a reasonably accurate answer (although that answer will probably not make your boss happy).