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alte1500

Error running Laminate optimization

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Hi,

 

Use Tools>Model Checker>Optistruct to find modeling errors.

https://insider.altairhyperworks.com/wp-content/uploads/2017/09/T-T-1248-HyperMesh-Model-Checker.pdf

In your model there are modeling errors:

-no thickness was defined in the non-design property

-material UD-1200 had E2=0 however UD plies have some transverse stiffness http://www.performance-composites.com/carbonfibre/mechanicalproperties_2.asp

-no Poisson's ratio was assigned on material BIAX-300-590

modelchecker.jpg

 

Construction was not connected to plating, so I have defined TIE contact using tools>contact browser>AutoContact 

https://altairhyperworks.com/pdfs/tips/1095.pdf

 

The loads and boundary condition are incorrectly set up. The model should be properly constrained to prevent rigid body modes and unreasonable deformations. 

I have undefined the SPC in the load step and set up inertial relief (PARAM>INREL>-2) instead, but the deformation is still unreasonable. Check the relevant literature on how such problems are constrained. The other model attached is constrained in all DOFs (encastre). 

mesh_laminated_edit_encastre.fem

mesh_laminated_edit_inertia_relief.fem

 

Once all these issues are resolved in the baseline model, you will be able to run optimization:

 

alte1500 likes this

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Hello,

 

Massive thanks for your reply... As you undoubtly already noticed am i not such an experienced user in hyperworks. Your response is very clear and exactly what i needed :D

 

Thanks a lot Ivan!!

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