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Extracting strain values on thin elastic layers
Posted Sep 28, 2016, 10:02 a.m. EDT Structural Mechanics Version 5.1 1 Reply
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Hello,
I am using a thin elastic layer to describe a glue layer in a solid mechanics problem. So the bulk material of small thickness corresponding to this glue layer is described by an interface.
I would like to extract strain values corresponding to this glue layer.
I can do so at the interface, but I am wondering : what's the meaning of this strain values ?
Thank you !
Regards,
Astrid.
I am using a thin elastic layer to describe a glue layer in a solid mechanics problem. So the bulk material of small thickness corresponding to this glue layer is described by an interface.
I would like to extract strain values corresponding to this glue layer.
I can do so at the interface, but I am wondering : what's the meaning of this strain values ?
Thank you !
Regards,
Astrid.
1 Reply Last Post Sep 29, 2016, 3:12 p.m. EDT
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Posted:
8 years ago
Hi,
The thin elastic layer does not have any strain variables. It is based on a stress vs. displacement formulation, since it does not have a physical thickness.
The strain that you see on the boundary is that of the surrounding solid.
Since you know the physical thickness of the layer, you can however create your own strain variables by dividing the layer displacement by that thickness. The variable names for the displacements are described in the User's Guide.
In the next version of COMSOL Multiphysics, there will be an option to enter the layer thickness, and then we will be able to provide built-in strain variables.
Regards,
Henrik
The thin elastic layer does not have any strain variables. It is based on a stress vs. displacement formulation, since it does not have a physical thickness.
The strain that you see on the boundary is that of the surrounding solid.
Since you know the physical thickness of the layer, you can however create your own strain variables by dividing the layer displacement by that thickness. The variable names for the displacements are described in the User's Guide.
In the next version of COMSOL Multiphysics, there will be an option to enter the layer thickness, and then we will be able to provide built-in strain variables.
Regards,
Henrik