Unrealistic mass using masscalc

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

Hello everyone,

 

I'm working on a project which consists of a carbon fiber truss structure (.hm file annexed below) and, even though I've got the right material properties inputed, the result mass is nearing 480kg for a 1m tall trussed structure. I've cheched my units and it's consistent all over the board (MMTS system).

I have no idea what can be causing that, can anyone help? 

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Answers

  • FaroukM
    FaroukM Altair Community Member
    edited July 2020

    Hi,

     

    Why it's unrealistic ? do you have experimental measurement?

  • QuyNguyenDai
    QuyNguyenDai Altair Community Member
    edited July 2020

    Carbon fiber truss with 'solid circle' section?

     

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

    Hi,

     

    Why it's unrealistic ? do you have experimental measurement?

     

    My understanding of unrealistic comes from past experience from working with those carbon fibre tubes/rods. I don't think that a 1m tall trussed structure could have a mass of 480kg as OptiStruct says. Nonetheless, I might be commiting an error somewhere and not seeing it, so that's why I asked.

    Altair Forum User said:

    Carbon fiber truss with 'solid circle' section?

     

    Yes, I'm using rod elements to validate my structure. Does it change something? Even with rods it shouldn't be that heavy...

  • LFSS
    LFSS Altair Community Member
    edited July 2020

    Turns out I was doing basic math wrong. Sorry for the inconvenience, guys!

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

    Turns out I was doing basic math wrong. Sorry for the inconvenience, guys!

    Alright. Good luck.

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