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Re: S&G: Plate development
By:Nick Schade - Guillemot Kayaks
Date: 12/7/2016, 10:21 am
In Response To: Re: S&G: Plate development (upchurchmr)

I believe the only way to actually bring the material properties of the ply and the practical requirement to have constant stiffness and smoothly changing slopes in the panel is to use a FEM to see that you don't impose some localized slopes in the surface.

As a practical matter, most kayak designs don't require that much bending or create that much stress - so long as the panel is developable - i.e. it is possible for a flat panel to make simple bend to form the shape. While it may be a bit of an art to choose a good surface shape, you don't need FEM to create a workable design.

There are some possible kayak features, such as the hatch recesses on my S&G Petrels that are at the outer limits of what plywood is capable of doing. The shapes are simple cones, so are easily developable, but grain orientation makes a big difference and it is still hard to form the shapes.

Messages In This Thread

S&G: Plate development
Hubert Schreier -- 12/3/2016, 4:10 pm
Re: S&G: Plate development
upchurchmr -- 12/3/2016, 4:38 pm
Re: S&G: Plate development
Hubert Schreier -- 12/3/2016, 4:55 pm
Re: S&G: Plate development
upchurchmr -- 12/3/2016, 5:45 pm
Re: S&G: Plate development
Nick Schade - Guillemot Kayaks -- 12/3/2016, 10:14 pm
Re: S&G: Plate development
Hubert Schreier -- 12/4/2016, 12:57 am
Re: S&G: Plate development
upchurchmr -- 12/4/2016, 3:37 am
Re: S&G: Plate development
Hubert Schreier -- 12/4/2016, 11:45 pm
Re: S&G: Plate development
Alex Ferguson -- 12/5/2016, 3:38 pm
Re: S&G: Plate development
upchurchmr -- 12/5/2016, 5:42 pm
Re: S&G: Plate development
Hubert Schreier -- 12/5/2016, 9:23 pm
Re: S&G: Plate development
Alex Ferguson -- 12/5/2016, 9:55 pm
Re: S&G: Plate development
Hubert Schreier -- 12/6/2016, 12:34 am
Re: S&G: Plate development
Nick Schade - Guillemot Kayaks -- 12/4/2016, 8:20 am
Re: S&G: Plate development *PIC*
Hubert Schreier -- 12/5/2016, 10:23 pm
Re: S&G: Plate development
Bill Hamm -- 12/6/2016, 12:56 am
Re: S&G: Plate development
Hubert Schreier -- 12/6/2016, 1:03 am
Re: S&G: Plate development
Bill Hamm -- 12/6/2016, 1:09 am
Re: S&G: Plate development
Hubert Schreier -- 12/6/2016, 1:20 am
Re: S&G: Plate development
Mike Bielski -- 12/6/2016, 1:09 pm
Re: S&G: Plate development *PIC*
Hubert Schreier -- 12/6/2016, 3:07 pm
Re: S&G: Plate development
Mike Bielski -- 12/6/2016, 4:35 pm
Re: S&G: Plate development
upchurchmr -- 12/6/2016, 7:14 am
Re: S&G: Plate development
Hubert Schreier -- 12/6/2016, 8:45 am
Re: S&G: Plate development
Nick Schade - Guillemot Kayaks -- 12/6/2016, 8:49 am
Re: S&G: Plate development
Hubert Schreier -- 12/6/2016, 10:04 am
Re: S&G: Plate development
upchurchmr -- 12/6/2016, 11:04 am
Re: S&G: Plate development *PIC*
Nick Schade - Guillemot Kayaks -- 12/6/2016, 7:29 pm
Re: S&G: Plate development
Hubert Schreier -- 12/6/2016, 8:26 pm
Re: S&G: Plate development *PIC*
Hubert Schreier -- 12/7/2016, 12:27 am
Re: S&G: Plate development
Nick Schade - Guillemot Kayaks -- 12/7/2016, 7:45 am
Re: S&G: Plate development
upchurchmr -- 12/7/2016, 9:29 am
Re: S&G: Plate development
Nick Schade - Guillemot Kayaks -- 12/7/2016, 10:21 am
Re: S&G: Plate development
upchurchmr -- 12/7/2016, 12:43 pm
Re: S&G: Plate development *PIC*
Hubert Schreier -- 12/13/2016, 4:00 am
Re: S&G: Plate development *PIC*
Nick Schade - Guillemot Kayaks -- 12/13/2016, 6:54 pm
Re: S&G: Plate development
Hubert Schreier -- 12/13/2016, 8:03 pm
Re: S&G: Plate development *PIC*
Nick Schade - Guillemot Kayaks -- 12/13/2016, 11:10 pm
Re: S&G: Plate development
Hubert Schreier -- 12/30/2016, 6:08 pm
Re: S&G: Plate development *PIC*
Dan Caouette (CSCWC) -- 12/14/2016, 6:55 am
Delftship
Nick Schade - Guillemot Kayaks -- 12/14/2016, 8:50 am
Re: Delftship *PIC*
Dan Caouette (CSCWC) -- 12/14/2016, 11:57 am
Re: Delftship
Nick Schade - Guillemot Kayaks -- 1/25/2017, 9:41 am
Re: Delftship
Dan Caouette (CSCWC) -- 1/25/2017, 6:19 pm
Re: S&G: Plate development
Hubert Schreier -- 12/30/2016, 5:53 pm
Re: S&G: Plate development
Dan Caouette (CSCWC) -- 12/31/2016, 8:57 am
Find "MultiConic Dev of Hull Surfaces"
mick allen -- 12/5/2016, 8:16 pm
Re: Find "MultiConic Dev of Hull Surfaces"
Hubert Schreier -- 12/5/2016, 11:07 pm