tsai wu

ibrahim polat
ibrahim polat Altair Community Member
edited March 2022 in Community Q&A

I have resolved a compoiste material law25 with radioss. bu I can't check with tsai-wu criteria at hyperview. I see only criterias for steel material not composite. could anyone help me abouth this isue

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Answers

  • PaulAltair
    PaulAltair
    Altair Employee
    edited March 2022

    Tsai wu isn't available directly as an output from Radioss, you can request the tensors and derive it if you wish, but be careful with the systems as it can get confusing between global, elemental, ply, material for the different outputs.

    /ANIM/SHELL/DAM1 (also DAM2, DAM3) allow you to plot the damage vs the allowables you have set in the material card.

  • ibrahim polat
    ibrahim polat Altair Community Member
    edited March 2022
    Paul Sharp_21301 said:

    Tsai wu isn't available directly as an output from Radioss, you can request the tensors and derive it if you wish, but be careful with the systems as it can get confusing between global, elemental, ply, material for the different outputs.

    /ANIM/SHELL/DAM1 (also DAM2, DAM3) allow you to plot the damage vs the allowables you have set in the material card.

    thank you your reply. it is very halpful

    so how can I check max stress on part at hyper

     

    /ANIM/SHELL/DAM1 (also DAM2, DAM3) allow you to plot the damage vs the allowables you have set in the material card.

    and also how can ı set materal card tsai wu

  • PaulAltair
    PaulAltair
    Altair Employee
    edited March 2022
    ibrahim polat said:

    thank you your reply. it is very halpful

    so how can I check max stress on part at hyper

     

    /ANIM/SHELL/DAM1 (also DAM2, DAM3) allow you to plot the damage vs the allowables you have set in the material card.

    and also how can ı set materal card tsai wu

    To effectively check stress/strain in composites, the approach may be different depending on the composite modelling approach you have followed (e.g. ply based with /PROP/TYPE51 and /PROP/TYPE19, or /PROP/PCOMPP, /STACK and /PLY or part/prop based, e.g. /PROP/SH_SANDW)

    For ply based, you can add requests:   (these give 'per ply' results, useful if your laminate is not uniform across your model)

    /ANIM/SHELL/IDPLY/PHI/ALL

    /ANIM/SHELL/IDPLY/STRESS/ALL
    /ANIM/SHELL/IDPLY/STRAIN/ALL

    For either ply or part based you can add requests:   (these give 'per layer' results, equivalent to plys if you have a uniform laminate, with no ply drops or different ply shapes)

    /ANIM/SHELL/PHI/ALL

    /ANIM/SHELL/TENS/STRESS/ALL
    /ANIM/SHELL/TENS/STRAIN/ALL

    Then, When loading results, you should use the 'composite' or 'advanced' result math template in HyperView, you can then view stress results per layer resolved in ply system

    If your 'base' element orientation (based on node order of element) is not aligned with '0' orthotropic reference for your material, the 'per layer' based results are more reliable than 'per ply' (these sometimes get projected incorrectly).

    Allowables in LAW25 can be set with the Wp, epsm, dmax parameters, how they interact is dependent on other flags (ioff)

    Setting up a Law25 correctly can be tricky, there is a set of compose scripts to help fit test data to LAW25, ideally you should have tensile and compressive data in directions 1 and 2, and a tensile or compressive test at 45º

    There are composite training sessions held online (listed in Altair One) if you can attend one, it is worth it!

     

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