Sorry. The convex (top) side is under tension from
being bowed out by the ribs, the underside is under
compression. When bearing is applied it works to
reverse this condition but, of course, can not
actually effect this unless the board has already
collapsed. In this regard, it is compression
deformation in the bottom half of the soundboard plane
and in the ribs ( and, in my opinion, case spread )
which is primarily responsible for soundboard
collapse.
Cheers,
Thump
--- Calin Thomason <calint@operamail.com> wrote:
> Richard
>
> Nice to see someone is thinking on their own,
> instead of simply swallowing someone elses BS.
>
> You are on the right track, FWIW. The model given
> by Mr Nossaman is far too simplistic to suficiently
> describe whats really going on. Keep on thinking for
> yourself. Its a refreshing change from much of what
> I read here on this subject.
>
> Calin Thomason.
>
>
> "Hmm.. I think we need to take a closer look at just
> whats happening where with this "When a load is
> applied to the top of the soundboard downward, the
> panel compresses more" bit. Why does it compress
> more ?? Because there is something holding it in
> place... namely the ribs. If the panels concave
> side
> becomes more compressed... then the convex side of
> the ribs simply MUST be experiencing more tension
> from the panel... its the other side of the same
> coin. "
> --
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