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Fatigue Analysis on Lattice Structure

User: "Aslan_20882"
Altair Community Member
Updated by Aslan_20882

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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    User: "Rahul Rajan_21763"
    New Altair Community Member
    Updated by Rahul Rajan_21763

    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

    User: "etrud011"
    Altair Community Member
    Updated by etrud011

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

    User: "FaroukM"
    Altair Community Member
    Updated by FaroukM

    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 ...

    User: "etrud011"
    Altair Community Member
    Updated by etrud011

     

    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.

    User: "FaroukM"
    Altair Community Member
    Updated by FaroukM

    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 ...