Re: living hinge simulation?
- From: Bo <bo@xxxxxxxxxxx>
- Date: Thu, 29 May 2008 11:08:32 -0700 (PDT)
On May 29, 8:58 am, post <p...@xxxxxxxxxxxx> wrote:
greets all --
quick question .. just an 'exercise' as I don't really
need to do this (or have to-date).
say you've modeled a plastic box with lid attached in
the open position with a living hinge -- how could one
(if its possible) close the box (bending the hinge) to
check if it works geometrically (ie your hinge isn't too
short, for example).
I can imagine doing this as an assembly with the hinge
built in-place -- but the box here would always close
(since the in-context hinge would update accordingly).
not looking for an animation or 'simulation' -- just
something like a visual geometric failure .. for example
the outside surface of the hinge penetrates the inside
surface when it folds closed.
-Tony
Good question, and I've done it and designed a half dozen or more
hinges.
I have used assemblies with different configurations to represent the
hinge as a separate part and that works OK.
I have also designed a solid where the hinge has a slight radius &
angle, and I dimension the curvature and neutral axis, to allow the
hinge to have the bend angle changed. The problem comes with, say,
the lid. The lid has to be designed to be entirely constrained to the
end of the hinge. This means you can't use any references to
horizontal or vertical or another fixed plane, as then the lid won't
"move" when the angle of the hinge is modified.
I personally think it would be terrific if SolidWorks would implement
a feature allowing a flat or curved section to be bent and allow one
side of the model to move with it, but I know this would cause a lot
of exceptions to be made, so I don't know if it would work or be
worthwhile.
I'll probably stick to my existing methods.
.
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