Error 1487 - Optristruct

Hi,

Can you share the .fem file please?

Hello Prakash!

Thank you for your answer!

The file is attached. I downloaded it from Altair's website.

Thank you very much!

Unable to find an attachment - read this blog

On the tutorial, on the minute mentioned above, the file is the file named: 02_analysis_complete

Hi,

Go to loadsteps>> Edit the first load step and remove the continuation line for STRESS and try again.

Thank you for you answer Prakash! I can now run the simulation.

What I can't get it's the composite failure, strain etc... I have the Global Output Request setup as told on the tutorial.

Do you think you can further assist me?

I think I have it now, I was running it without propper setting up.

Sorry to bother you, thank you for your help!

OK, thank you for the update /emoticons/default_smile.png' srcset='/emoticons/smile@2x.png 2x' title=':)' width='20'>

Hi,

 

Go to loadsteps>> Edit the first load step and remove the continuation line for STRESS and try again.

Sorry I don't know where to remove the continuation line for STRESS

may you show me in a photo?

thanks

Hi @e20407

the continuation line for STRESS is under OUTPUT

<?xml version="1.0" encoding="UTF-8"?>

Hi @e20407

 

the continuation line for STRESS is under OUTPUT

thanks

Sorry

I got one more question in the same video(23:20-23:55)

I  do as the video and remove the continuation line for Stress

but it didn't show up at Composite Strains and Composite Stress

<?xml version="1.0" encoding="UTF-8"?>

For PCOMPP, the SOUT field (result request) on the corresponding PLY entries should be set to YES.

<?xml version="1.0" encoding="UTF-8"?>

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對於PCOMPP，相應PLY條目上的SOUT字段（結果請求）應設置為YES。

 

Thank you so much.

Unable to find an attachment - read this blog

HELLO
Can I import my 3D CAD file into Composite analysis directly? My 3D CAD has thickness, but in HyperMesh example, it’s a pure surface. Does that mean I need to make my file a non-thickness CAD?

Hi,

you can import 3D cad file into Hypermesh and automatically extract midsurface and assign thickness.

Insider July Featured Tip and Trick

https://altairuniversity.com/7196-advanced-midsurface-training-material/

hello Hyperman

I've prepared another non-thickness CAD with surface only.

When I pre mesh, I can see the whole surface is meshed, but after I click 'return', there's some area lost the mesh

<?xml version="1.0" encoding="UTF-8"?>

<?xml version="1.0" encoding="UTF-8"?>

 how can i fixed it?  thanks

I think the mesh is there- it just looks like it's lost because the surface geometry is obscuring the mesh. Hide the surface or display wireframe geometry to verify.

<?xml version="1.0" encoding="UTF-8"?>

Hi Hyperman,

1. Can I set force and SPC on the modal surface like picture below? 
(I find an example at 42:42 in this video,  

<?xml version="1.0" encoding="UTF-8"?>

2. I've already checked the mesh, and it is there. But after I put composite laminate on my model, it's broken like this 

<?xml version="1.0" encoding="UTF-8"?>

3. However, I skip this problem and proceed to click 'OptiStruct', there are lots of Error#15.
<?xml version="1.0" encoding="UTF-8"?>

I'll be really appreciate if you can check my file in the link below
(https://)

Thank you

Hi,

1. Constraints and loads applied on single nodes will cause stress singularity. For more details refer to: 

https://www.comsol.com/blogs/singularities-in-finite-element-models-dealing-with-red-spots/

2. and 3. are due to bad mesh. You should remesh the model  using the these tools:

• Geom>autocleanup to clean up the geometry
• 2D>automesh>QI  optimize (F12) to mesh using quality criteria
• 2D>elem cleanup
• 2D>qualityindex
• tool>check elems>2D (F10) to check elements

There are more then 4 million elements in the model you shared. Reduce the element count (increase element size), unless you have access to supercomputer to solve this model in a reasonable time.

There are some great learning materials from Altair university- Practical Aspects of Finite Element Simulation is a good starting point.

https://altairuniversity.com/free-ebooks-2/

Check the following Youtube channels:

Altair University

Altair India Student Contest

ELEATION By Apoorv Bapat

https://altairuniversity.com/wp-content/uploads/2012/04/HM_Geometry_extract.pdf

https://altairuniversity.com/wp-content/uploads/2014/02/HM_Automeshingintro.pdf

https://connect.altair.com/CP/SA/training/self_paced/aero_v13/PDF/chapter4_demonstration.pdf

The Like button is an easy way to show appreciation for a post /emoticons/default_wink.png' srcset='/emoticons/wink@2x.png 2x' title=';)' width='20' />

getting this error again and again what is error and how to resolve please help

Messages for the job:

 *** See next message about line 16 from file:
     C:/Users/Desktop/air.fem
  'STRESS(COMPLEX,ALL,CENTER,,,,,'
 
 *** ERROR # 1487 *** in the input data:
 Continuation card not allowed.

Just deactivate stress & strain output from global output request. Since this is a composite material CSTRESS & CSTRAIN should be fine.