Defining the material properties of the honeycomb core

[Anonymous]

I want to do Linear Steady-State Heat Transfer Analysis to the honeycomb sandwich construction (HSC).

I think the honeycomb core is 3D Orthotropic material, so I think the material properties of the honeycomb core are different from that of the material of honeycomb core. I don't know the material properties of the honeycomb core.

I plan to use Aluminum 7075.

What should I do define the material properties of the honeycomb core?

Sincerely,

7515085

[John_Holtz · Accepted solution]

Hi @Anonymous 

I do not know if HSC is something in the Nastran software, or if that is a standard industry term. But I will get to that later.

For the thermal conductivity, I assume that you are using solids in your analysis so that you can specify the thermal conductivity in 3 directions. (Shells and laminates only conduct heat in 2 dimensions.) So I assume that you have a solid block for the core and you want to enter the thermal conductivity to simulate the honeycomb. Here are some ideas:

• Find a research paper or text book that describes how to calculate the conductivity based on the dimensions and properties of the honeycomb.
• If a standard construction, maybe the supplier has conductivity data.
• Perform a test to measure the conductivity.
• Create a model of the honeycomb in full detail and analyze the heat transfer. Compare that result to a solid block and adjust the conductivity as needed to give the equivalent result. 

[Anonymous]

Hi, john.holtz,

Thank you for your reply.

I'll try your advice.

If I have some trouble in the honeycomb analysis, I'll ask something again.

Sincerely, 

7515085