Honeycomb Panels with COSMOS

Aug 16, 2005 3 Replies

Anyone have any success modelling honeycomb panels with COSMOS? We are trying to model CF skins with AL cores, but have a large number of questions. Here is what we have so far:



Elastic Modulus (Pa or N/m2) X face material modulus of elasticity compression Y face material modulus of elasticity compression Z ???? - use face material value?



Poissons Ratio X face material poisons ratio Y face material poisons ratio Z ???? - use the same as face material value?



Sheer Modulus XY 30% of facing stress YX 30% of facing stress XZ calculate via the core sheer on the plate



Density



- calculate from specs


Tensile Strength - the strength of the adhesive bonding the skin to core - double the tensile strength of the core material (yikes!)



Compressive Strength - double the compressive strength of the core material (yikes!)


Yield Strength - 5% more than tensile strength (???)


thanks



What are "sandwich elements"? I am unable to find this in SW or Cosmos. Is this what you use to model honeycomb panels? Pray tell...

You can't find it because it is not there. Sandwich elements or layered shell elements are probably on the to do list for CosmosWorks. They are in Cosmos/M which you may or may not have depending on which package of CosmosWorks you have. If you have geostar in your install directory you may have Cosmos/M. In that case you can create the mesh in CosmosWorks as a shell mesh and then define the appropriate properties in Cosmos/M for the model.

The other alternative is to see if CW supports orthotropic material properties, but then you will have to generate the appropriate values for Ex, Ey, Ez, etc. and make sure the elements properties are lined up in the correct direction.

Join the Discussion

Have something to add? Share your thoughts — no account required.

Didn't find your answer?

Ask the community — no account required