Jump to content
Sign in to follow this  
Tom Barnes

Lattice Type 4 Failing with 0 Compliance

Recommended Posts

Afternoon,

 

I am comparing the different types of lattice using a simple volfrac and compliance study with both a compression and bending load case.

 

  • Lattice types 1 and 3 ran without problem.

 

  • Lattice type 2 failed in stage 2 ever after deleting the line below ran without problems for both the bending and compression runs.

 

CONTACT 2       FREEZE        21      31OPENGAP         NO
+       N2S     SMALL   NO              NO      .F

 

 *** ERROR # 1479 *** in the input data:
 Incorrectly formatted numeric data in field 7.
 (If it is a character field, it should start with a letter.)

 

  • Lattice type 4 failed with the same error however when I deleted the line below causing the error the model ran but generated a compliance of 0 for both the bending and compression runs.

 

CONTACT 2       FREEZE        21      31OPENGAP         NO
+       N2S     SMALL   NO              NO      .F

 

I have attached both the start file, second stage file and output file for the bending study of lattice type 2 and 4. Can anyone help me with this issue?

 

Thanks in advance,

Tom

 

 

 

 

 

Share this post


Link to post
Share on other sites
Guest

Hi,

 

I am able to run the file as it is. But after looking at the results, I see that there is no load is going to the structure. 

 

Please check and correct the same. 

Lattice.png

Share this post


Link to post
Share on other sites

If you are referring to the 4_bending_lattice file I also see the same. I believe this could be because the lattice type used results in the nodes where the force being removed? Is this correct?

Share this post


Link to post
Share on other sites
Guest
On 8/10/2018 at 9:37 PM, Tom Barnes said:

If you are referring to the 4_bending_lattice file I also see the same. I believe this could be because the lattice type used results in the nodes where the force being removed? Is this correct?

Looks like it is. Try apply loads on element nodes and check  if that helps. You may face another error with contacts. 

Share this post


Link to post
Share on other sites
Guest

If you face any issue with contacts after applying loads on element nodes, please let me know. 

Share this post


Link to post
Share on other sites
Guest

Hi @Tom Barnes and @Busra ASlan

 

Sorry that I missed this forum post.

 

I tried connecting the load to the nearest nodes and I am able to see results. 

 

It is recommended to make the elements connected to spcs and loads part of non-design space. 

Share this post


Link to post
Share on other sites
Guest

@Busra ASlan

 

Looks like you have contacts in your model.

 

You can edit the .fem file in any text editor and go to line 7542 which contains contact details.

 

remove the .F from the line shown in the error message, save the file and try again. 

Share this post


Link to post
Share on other sites

Create an account or sign in to comment

You need to be a member in order to leave a comment

Create an account

Sign up for a new account in our community. It's easy!

Register a new account

Sign in

Already have an account? Sign in here.

Sign In Now
Sign in to follow this  

×