Fatigue Analysis on Lattice Structure

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

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

etrud011

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

FaroukM

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

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

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 ...