what is the simple formula used in Hypermesh for fastener axial stiffness calculations ?

SSKG
SSKG Altair Community Member
in Community Q&A

Hi Team,

I am looking for a simple formula used by Hypermesh for calculating axial stiffness while creating fasteners under fastener setup option.

I am getting a very negligible difference in tensile stiffness values when I compare the Hypermesh K1 value with analytical one.

Thank you

Best Answer

  • SSKG
    SSKG Altair Community Member
    Answer ✓

    Hi Jason,

    Sorry, I missed to mention it before.

    I am looking for CFAST. I can see the explanations for length consideration in the HM help but nothing menstioned for CFAST.

    In addition, for shear stiffness calculation, is it possible to adopt the user Huth formula for CFAST shear stiffness calculation?

    I am trying to create the CFAST using the option: Aerospace>Fatsener Set Up> CFAST with Element option for GA-GB reference.

    Thank you

    Shiva

Answers

  • Jason_Craanen
    Jason_Craanen
    Altair Employee

    Hello,

    Can you please specify exactly which Fastener realization type you are using?

    Thanks

    jason

  • SSKG
    SSKG Altair Community Member
    Answer ✓

    Hi Jason,

    Sorry, I missed to mention it before.

    I am looking for CFAST. I can see the explanations for length consideration in the HM help but nothing menstioned for CFAST.

    In addition, for shear stiffness calculation, is it possible to adopt the user Huth formula for CFAST shear stiffness calculation?

    I am trying to create the CFAST using the option: Aerospace>Fatsener Set Up> CFAST with Element option for GA-GB reference.

    Thank you

    Shiva

  • Jason_Craanen
    Jason_Craanen
    Altair Employee

    Hello

    Yes it is using the Huth formulation.

    You should be able to calculate your own values and input them manually.

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