Shell element contact problem

[deveshp1]

Hello All,

I am facing some problem while defining contact between shell elements. My problem is as below.

1. Two thin layers (thickness of 10^-5 m each) of composite material are bonded to a solid material like foam.
2. A third layer of the same thickness comes in contact for a certain period of time. This third layer is hot at a temperature of 232 deg celsius and there is a surface to surface contact.
3. I know the thermal contact conductance value between the hot layer and the two composite layers.

I have modeled this problem in Ansys classical. I created an area to define the hot layer and a volume which is offset from this area by the hot layer thickness to define the two bonded layers in contact wit a solid foam (Meshing area attached to the volume with shell elements and then sweeping the area by VSWEEP command) I am using SECOFFSET as bottom plane for the two bonded layers (as it is also bonded to a solid material to use the Paint option) and top plane for third hot layer. The problem while solving is that I cannot see any heat transfer from the hot layer to the two bonded layers.

Am I making some mistakes in modeling the problem?

Please help.

Thank You.


Devesh

 

[Achy47]

Dear Devesh,

Thank you for sharing your problem with us. It seems like you have a complex and interesting simulation set up. From what you have described, it appears that the thermal contact conductance value between the hot layer and the two composite layers is not being properly accounted for in your model.

To properly define the contact between the shell elements, I would suggest using the CONTACT element in Ansys. This element allows you to define the contact properties between different materials, including thermal contact conductance. You can also specify the contact surface between the different layers by defining the offset distance and contact type (surface to surface in this case).

Additionally, make sure that the material properties and boundary conditions are accurately defined for each layer in your model. This will ensure that the heat transfer is properly simulated between the hot layer and the two bonded layers.

I hope this helps you solve your problem. If you continue to face issues, feel free to reach out for further assistance.