Discussion Forum

Hello, I am trying to analyze a leaf venation structure using COMSOL to find the maximum deflection of a leaf due to gravity acting on the surface. I am using the structural mechanics module with a beam and shell couple. I have modeled the leaf's veins as beams and the leaf's skin as a shell in my COMSOL file. I drew the geometry of the leaf in AutoCAD and imported it to COMSOL. Each vein of the leaf system has a different radius, but in my geometry I drew all the beams as just 2D lines without a radius. I am wanting to correct analyze this system by incorporating each vein's radius which I have data for in an Excel file. To do this I need to determine each beam's unique ID from COMSOL in order to write .txt file relating the geometry from my COMSOL file to each corresponding radius I have in my data sheet. Is there a way to export the geometry of each beam from my COMSOL file so I have each unique ID in my COMSOL geometry? Or, is there a way to create a function for the material properties for density relating the coordinates of each beam and their respectful radii? Any help would be appreciated. To summarize: I am trying to analyze a large leaf venation system with various radii. Each vein has a different radius but I have not drawn this in the geometry for my structure. If I want to relate the density of my leaf beams to their respectful radii how can I go about this with the coordinates and/or ID's of each beam?

I am attaching the Leaf COMSOL file to this post. Thank you