fatigue tests

[matteo89]

Hello everyone!
I will shortly have to carry out fatigue tests for the internship and I wanted to know if there were standard procedures for these tests knowing that the load to be applied is traction and the load spectrum must be random ie random spikes all traction (between 0 and a maximum value). thank you very much for the collaboration! ! !

 

[meccanicamg]

I would say it is worth checking on the site of the unit and maybe asking directly to them. uni e unsider responding to student emails and have always given good collaboration. ovviamene you need to explain to them the situation, specify all data, indicate that you are students etc. etc.
I always found very friendly people.

in hiring contact some professor or researcher of sitec to the polimi di lecco and possibly contact them by phone. I think there's still a list of teachers on the portal. they are always available.

 

[matteo89]

Thank you very much for the suggestions. between the rules I found 3964 which seems very interesting to me and speaks of fatigue tests, although it does not specify the execution in the case of random loads. However, I do not think there are procedures in these cases, even because to characterize the materials there are tests with simple stresses (to find the diagrams of wohler or haigh for example). random loads or rather load spectra are mentioned in the case of cumulative damage. However, I will try to contact the unisider if necessary as you proposed. Thanks again!!

 

[matteo89]

further problem: I have to do evidence of tenacity to fracture with c(t), c(t) testes to c to understand us. to carry out the cut to v with which processing I could proceed, considering that the cut should be wide between 7,2, deep 34,2, opening angle v of 30 degrees with fitting on the tip of 0.1? I would like to avoid using wire electroerosion to save if it is possible.

 

[meccanicamg]

if you don't have candle cutters thin enough you have to do in wire erosion