Fatigue Analysis on Lattice Structure

Aslan_20882
Aslan_20882 Altair Community Member
edited October 2020 in Community Q&A

Hı everyone,

I want to do fatigue analysis. After Lattice Optimization, my model has 1d beams. 

How to convert from 1d element to shell element.

 

Thank you

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Answers

  • Rahul Rajan_21763
    Rahul Rajan_21763 New Altair Community Member
    edited March 2019

    You can perform fatigue analysis using OptiStruct.Please refer Optistruct online fatigue analysis tutorial and down free eBook using below link.

    https://altairuniversity.com/free-ebook-learning-fatigue-analysis-with-optistruct/

     

    There is no direct option available to convert 1d to 2d  element. Please check for script exchange for any scripts.

    https://connect.altair.com/CP/script-list.html

  • etrud011
    etrud011 Altair Community Member
    edited July 2020

    Is it possible to perform fatigue analysis on the lattices when they are linear elements (in optistruct)?

  • FaroukM
    FaroukM Altair Community Member
    edited July 2020
    Altair Forum User said:

    Is it possible to perform fatigue analysis on the lattices when they are linear elements (in optistruct)?

     

    I don't see why you can not perform it ...

  • etrud011
    etrud011 Altair Community Member
    edited July 2020
    Altair Forum User said:

     

    I don't see why you can not perform it ...

    Optistruct keeps telling me that linear elements can only be used in spot weld fatigue analysis (version 2019.2). See error below:

     *** ERROR # 6817 ***
     CBAR/CWELD only can be used for spot weld fatigue analysis. PFATSPW is
     required for spot weld fatigue property.

     

    That is why I am asking if it is possible.

  • FaroukM
    FaroukM Altair Community Member
    edited July 2020
    Altair Forum User said:

    CBAR/CWELD

    Linear FE for me means the classic element (HEX using Lagrange interpolation for example).

     

    I have never done fatigue analysis on beam or weld FE. Maybe we have to wait for the new OS release ...

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