Which is the question of the benefit or not of a more or less orthotropic material...
The common plywood is with a cross grain structure. A in line grain structure may need a specific sourcing with the according cost. Without an idea of the benefit, it could explain nobody tested it.
If one truly wants to test an "in-line" structure, there is no reason it needs to be plywood. Guitar soundboard material could be used.
Eric
The veneer panel I made with the grain running in the same direction worked quite well, although it would have been nice to have it made in a larger size to see if it could work better?
It was about 17.5 cm x 34cm with an overall thickness of about 1mm I believe.
I just happened to have this material in a drawer for some reason ?
Steve.
It was about 17.5 cm x 34cm with an overall thickness of about 1mm I believe.
I just happened to have this material in a drawer for some reason ?
Steve.
Koskiflex is the product from Makerstock with an 'In Line' Grain, the increased flexion properties are clearly evident.
https://makerstock.com/products/birch-plywood-flexible
https://makerstock.com/products/birch-plywood-flexible
My take on this remains as discussed ages ago with Eric.... They are fundamentally different... With the main ply direction transversely arranged, the transverse stiffness dominates the panel and compromises low frequency performance. Imo, if using anisotropic material in a rectangular panel, the 'grain' must be vertically aligned. Although I have at times thought about using a slight angular bias off vertical, but haven't tried it.
Eucy
When an individual goes to the extent of producing their own Panel using the Plywood Structure for the Panels Design, there are options on how the Tiers can be laid upon each other.
These same options can also leas to researching stiffness for a Panel and where the optimisation for Dimension vs Flexion is to be found.
As a suggestion, not all Tiers need to be full panel dimension, a Tier within the Sandwich could be strips only of a selected Width and are the only Cross Grain used in the Tiers, as an example a 25% - 75% surface area of the main Panel Dimension could be a Cross Grain area, with different %'s of coverage to be used to create different flexions across panels being produced?
These same options can also leas to researching stiffness for a Panel and where the optimisation for Dimension vs Flexion is to be found.
As a suggestion, not all Tiers need to be full panel dimension, a Tier within the Sandwich could be strips only of a selected Width and are the only Cross Grain used in the Tiers, as an example a 25% - 75% surface area of the main Panel Dimension could be a Cross Grain area, with different %'s of coverage to be used to create different flexions across panels being produced?
This can also be achieved by laying strips of yellow trace paper on panels... You'll have to search it out on this forum
Eucy
When Panel Flexion being Optimised is a requirement for creating Sound that is improved.
It certainly makes sense to try out methods that create a Structure for a Pabmnel where there is differences in resistance on a Panels freedom to flex.
From reading reports/descriptions of experiences had, it seems Panel Weight/Panel Flexion are selected by an individual as a preference.
Maybe all individuals building these Panels will not settle on a One Weight/One Stiffness of Panel only solution. There will be a range of designs that are Wed to.
It certainly makes sense to try out methods that create a Structure for a Pabmnel where there is differences in resistance on a Panels freedom to flex.
From reading reports/descriptions of experiences had, it seems Panel Weight/Panel Flexion are selected by an individual as a preference.
Maybe all individuals building these Panels will not settle on a One Weight/One Stiffness of Panel only solution. There will be a range of designs that are Wed to.