You have nice, very precisely created models @Jano! Although VirtualBow is not perfect, it is nice tools to see “what if”, thus the effect of different parameters. For example, the thicker sinew layer is or the more stiffer the sinew/glue matrix is, the less strained is core’s back side.
By the way, what is your source for elastic modulus for dry sinew? For example Kooi (1994, 16) gives very low value, only 9e8 Pa. You have used value 2,41e9 Pa. There are a lot of variation, depending on the source.
Yes, I am interested in your Excel-table, so please translate it.