Non-linear material

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

Hi there,

 

How can we input the material properties for a nonlinear material like NILON?

Here I have the Stress Vs strain curve data, density, tensile modulus, etc., with me as an input...

 

Thanks In Advance

 

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Answers

  • Altair Forum User
    Altair Forum User
    Altair Employee
    edited August 2013

    Hi,

     

    it's different for every solver... so there is no global answer.

     

    Regards,

    Mario

  • Altair Forum User
    Altair Forum User
    Altair Employee
    edited August 2013

    Sorry,

     

    I am flexible with radioss and nastran,..

     

    Whether the material card is belongs to HYPERELASTIC or something else.?

  • Altair Forum User
    Altair Forum User
    Altair Employee
    edited February 2014

    Hi,

     

    I am not very familiar with NASTRAN, because i work mostly on Abaqus.

     

    But yes, you can include the stress-strain curve in your material definition. Nylon is not an Hyperelastic material, Hyperelastics are defined by definining the strain energy potentials (material models such as marlow,ogden,neo-hookean,yeoh etc).

  • Altair Forum User
    Altair Forum User
    Altair Employee
    edited September 2015

    So for hyper-elastic materials which material card should I use?

    Please let me know if you have any idea on this...

  • Altair Forum User
    Altair Forum User
    Altair Employee
    edited September 2015

    Hi Jodha,

     

    Use MATS1 in OptiStruct

  • Altair Forum User
    Altair Forum User
    Altair Employee
    edited September 2015

    Thanks Prakash...

    But in that how can I enter the strain coefficient values?

  • Altair Forum User
    Altair Forum User
    Altair Employee
    edited September 2015

    Jodha,

     

    Try with MATX02 in OptiStruct. This works with only NLGEOM analysis

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