MATort9

Altair Forum User
Altair Forum User
Altair Employee
edited October 2020 in Community Q&A

Hello Group

 

Refering to MATORT9 card for planar isotropic model according to comment §4 only are independent parameter (Ep, En, vp, vnp, and Gn)

 

so should we keep rest of the field on card blank like E2 nu23 and G12, G31. Will optistruct automatically calculate them

 

Regards

Pratik

 

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Answers

  • Altair Forum User
    Altair Forum User
    Altair Employee
    edited July 2015

    Hi Pratik,

     

    when it comes to isotropic material the properties are identical in all directions. So E1=E2, nu1= nu2 and G12=G21.

  • Altair Forum User
    Altair Forum User
    Altair Employee
    edited July 2015

    True, so should I input the values of E1 and E2 as well or just inputting E1, optistruct will automatically assume E2 value same as E1

  • Altair Forum User
    Altair Forum User
    Altair Employee
    edited July 2015

    Pratik,

     

    Yes, provided the material is planar isotropic.

  • Altair Forum User
    Altair Forum User
    Altair Employee
    edited July 2015

    Hi Prakash

     

    So for Normal Anisotropy

     

    G13= G23=Gn

     

    so what value is expected in G31 .... Gn or Gp?

     

    Regards

    Pratik

  • Altair Forum User
    Altair Forum User
    Altair Employee
    edited August 2015

    Hi Pratik,

     

    Due to symmetry the shear component relationship will result in ij = ji.

     

    G13= G31.

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