Fatigue prediction using PSD

Altair Forum User
Altair Forum User
Altair Employee
edited October 2020 in Community Q&A

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

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Answers

  • Altair Forum User
    Altair Forum User
    Altair Employee
    edited July 2011

    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
    Altair Forum User
    Altair Employee
    edited January 2012

    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
    Altair Forum User
    Altair Employee
    edited September 2012

    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 Król

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