Foam Core Density
Posted: Fri Dec 04, 2020 12:21 pm
I'm wondering if others have used foam as a core material, and what density they used with good results.
Specifically I'm looking at Rohacell 51 IG which bonds well and has beyond adequate compression strength. What I'm really worried about is peel strength in low density foams, as this is critical to ski failure. It seems (from previous posts) that people have had the same internal laminar failure that flat grain balsa exhibits. I'm almost positive this is due to a low shear modulus, but my lack of engineering experience may not be serving me well here.
In other words the ski delaminates, but it is an internal failure of the core, not a failure of the bond line of between composite and core.
Specifically I'm looking at Rohacell 51 IG which bonds well and has beyond adequate compression strength. What I'm really worried about is peel strength in low density foams, as this is critical to ski failure. It seems (from previous posts) that people have had the same internal laminar failure that flat grain balsa exhibits. I'm almost positive this is due to a low shear modulus, but my lack of engineering experience may not be serving me well here.
In other words the ski delaminates, but it is an internal failure of the core, not a failure of the bond line of between composite and core.