Altair RISE

A program to recognize and reward our most engaged community members

Nominate Yourself Now!

Fatigue prediction using PSD

I am new for fatigue calculation.I want to conduct fatigue analysis for load case involving modal frequency response with acceleration load using power spectral density, I dont know how to calculate fatigue life from PSD, please any one help me with the steps involved in it in detail.

Thanks,

Nithyanandham

Find more posts tagged with

English

OptiStruct

Accepted answers

All comments

Altair Forum User

I am new for fatigue calculation.I want to conduct fatigue analysis for load case involving modal frequency response with acceleration load using power spectral density, I dont know how to calculate fatigue life from PSD, please any one help me with the steps involved in it in detail.

Thanks,
Nithyanandham

in this link you should get some information

http://www.testing-expo.com/europe/06txeu_conf/pres/day_1/kemmerich.pdf

Altair Forum User

it is not necessary to have PSD data. in excel sheet create a sine curve with amplitude F. F * sinA, A 0 to 360. then save it as .csv file. now you can do fatigue calculations as usual and use this excel sheet instead of PSD data.

Altair Forum User

Dear Aranmech,

How can I load excel csv to load collector? I choose analysis->forces->curve. I don't know where should I load csv data.

I'm using HyperMesh v11.0.

Best Regards,

Roman Kr√≥l