defining property for 2D plane strain analysis

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

Hi! 

I would like to know what card image i should use for plane strain analysis in Radioss block.

I have checked  /ANALY card in the tutorials and such and could not find details on how to define the property.

For your information, the model is a simple square in tensile load from two sides.

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Answers

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

    Hi Teng,

     

    Please refer to the 

    Example 8 - Hopkinson Bar
  • Altair Forum User
    Altair Forum User
    Altair Employee
    edited July 2015

    hello! thank you for your swift reply.

    i have read Example 8 - Hopkinson Bar as you advised, word for word, but i do not find anything mentioning the card image for property used. 

    also, the /ANALY inside the example is for axisymmetry, not plane strain.

    Sorry to take your time, but can you advise me specifically which card image is appropriate?

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

    Hi Teng,

     

    I don't see any restrictions when using /ANALY= 2 (plane strain) for material or properties.

     

    So, If you have shell elements, use a proeprty which is compatible with 2D elements (like PROP/SHELL)

  • pohan
    pohan Altair Community Member
    edited July 2017

    HI Prakash

    Could you please tell me wich contact interface is compatible with 2D plane strain? As far as I know, type 7 is not compatible with 2D plane strain

  • Altair Forum User
    Altair Forum User
    Altair Employee
    edited July 2017

    Hi Pohan,

    I think only /INTER/TYPE5 contact is supported for plane strain analysis.  

  • pohan
    pohan Altair Community Member
    edited July 2017

    Hi George,

    I use /INTER/TYPE5 for my plane strain model but the contact is not worked. Could you please help me check the model file that I send you in Dropbox.

  • Altair Forum User
    Altair Forum User
    Altair Employee
    edited July 2017

    Hi Pohan,

    The updated files has been sent to you.

    Meanwhile, also recommend you to upgrade to HyperWorks 2017 version, which you can download from http://www.altairuniversity.com/free-hyperworks-2017-student-edition/

  • pohan
    pohan Altair Community Member
    edited July 2017

    Hi George

    I received your model files.

    Could you please tell me more about the step 3

    3). For 2d contact you need to define /SURF/SEG using two nodes. However, neither HyperMesh nor HyperCrash support this. The work around is to create a /LINE/SEG using the contactsurfs panel. Then use contact surface to define your contact interface. Export your model and manually change the /LINE/SEG to /SURF/SEG using a text editor

    I do not understand how to 'create a /LINE/SEG using the contactsurfs panel. Then use contact surface to define your contact interface. Export your model and manually change the /LINE/SEG to /SURF/SEG using a text editor'

  • Altair Forum User
    Altair Forum User
    Altair Employee
    edited November 2020

    Hi,

    Please find the video recording of the same.

    Hope it helps.

    Unable to find an attachment - read this blog

  • pohan
    pohan Altair Community Member
    edited July 2017

    Hello George.

    I have an other problem with my plane strain model. The error is 

     ZERO OR NEGATIVE VOLUME FOR 2D ELEMENT ERROR ID 228

    Does it because of the material?

  • Altair Forum User
    Altair Forum User
    Altair Employee
    edited July 2017

    Hi Pohan,

    Please share the model file.

  • pohan
    pohan Altair Community Member
    edited July 2017

    Hello
    Please help me check the model
    Please keep my material, and BCS,

  • Altair Forum User
    Altair Forum User
    Altair Employee
    edited July 2017

    Hi,

    The revised model file has been sent.

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