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defining property for 2D plane strain analysis

Altair Forum User

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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Altair Forum User

Hi Teng,

Please refer to the

Example 8 - Hopkinson Bar

Altair Forum User

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

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

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

Hi Pohan,

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

pohan

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

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

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

Hi,

Please find the video recording of the same.

Hope it helps.

Unable to find an attachment - read this blog

pohan

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

Hi Pohan,

Please share the model file.

pohan

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

Altair Forum User

Hi,

The revised model file has been sent.