Error #144

Dani_20
Dani_20 Altair Community Member
edited October 2020 in Community Q&A

Hello,

 

I have been trying to simulate a sandwich panel with aluminium core, insert and carbon fiber laminate. I have introduced the following values for carbon fiber and core:

 

   image.png.4614a0f5d7fed558fa22ff798d2944a8.png    image.png.23ce0a6ad2a9dc125099d251cdeea5a9.png

 

I have also defined the failure criteria in properties as TSAI. I believe everything is correctly defined, however when I run the simulation the following error appears:

 

 *** ERROR # 144 ***
 CPYRA element 155981 has singular strain functions.
 Please check material data.
 

Anybody could help me please?

 

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Answers

  • Robert Lawson
    Robert Lawson Altair Community Member
    edited November 2019

    Looks like you need to define the G's in your materials which are currently blank. 

     

    In the case of the core, G23 and G31 are the key stiffness values relevant for honeycomb core.  Typically, these would be grabbed from a Hexcel datasheet.

     

    For the carbon fiber material, you can estimate G1Z and G2Z to be the same as G12.

     

    - Robert

  • Dani_20
    Dani_20 Altair Community Member
    edited November 2019

    Thank you for the information

     

    I have introduced the values and the simulation runs correctly

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