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Composite Panels

06/17/2011 9:17 AM

17/06/2011

Sir, What type of panels can be considered as a "composite panel" ? Is there any general specification for a "composite panel" ? Can we consider HARDWOOD PLYWOOD as a "Composite Panel" ? If we cannot consider HARDWOOD PLYWOOD as a "Composite Panel", then what is the difference between a Plywood and a "Composite Panel" ? Can anyone give me an explanation ?

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#1

Re: COMPOSITE PANELS

06/17/2011 9:20 AM

Plywood is not a "composite". It is a homogeneous material.

Composites are made from more than one material.

These are composite panels.

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#2
In reply to #1

Re: COMPOSITE PANELS

06/17/2011 9:45 AM

I wanted to argue and be pedantic and say plywood is a composite...but I think you have nailed it (tee hee) so I'll have to give you a GA... Ah but...
Mind the bottom panel in your pic is Aluminium sheet sandwiching an aluminium honeycomb... both the same 'material', so maybe I won't give you that GA afterall.
Del
<scampers off cackling wildly>

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#3

Re: COMPOSITE PANELS

06/17/2011 9:46 AM

But don't plywoods consist of wood and resin glues? Therefore, they cannot be homogeneous then, and instead must be considered a "composite".

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#4

Re: Composite Panels

06/17/2011 10:22 AM

Never mind. I'm wrong, plywood is a composite.

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#5
In reply to #4

Re: Composite Panels

06/17/2011 11:23 AM

No no, you can't just roll over like that.
I'll hold your coat while you fight
Del

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#6

Re: Composite Panels

06/17/2011 11:43 AM

Maybe a composite has to have two different materials or two different structures?
So by that definition the aluminium honeycomb sandwich would count as a composite, whereas plywood probably wouldn't unless it had two woods of noticeably different properties, say Balsa and Birch?
C'mon... who's gonna argue eh? eh? Put 'em up, put 'em up.
Del

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#7
In reply to #6

Re: Composite Panels

06/17/2011 11:54 AM

Well, I was gonna put up a Wiki article to prove my superior intelligence, then I saw this, from Wikipedia.

"Plywood is a commonly encountered composite material"

I don't have the energy to fight such overwhelming (I still think it's wrong) evidence.

Slinks off to corner, looking for dog to kick.

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#8

Re: Composite Panels

06/18/2011 8:39 AM

Yeah. What Lyn said. Those are generally what is being referred to when someone speaks of composite panels, although technically plywood would also qualify. It's good stuff, particularly when you want a real high weight to rigidity ratio. In my experience, surprisingly few engineers and designers that I've worked with are familiar enough with it to really know its potential. There are also composite panels that are made of 3 or more types of material.

Their biggest practical drawback that I can think of is the fact that the cut edges expose the inner core material. Sometimes that isn't desirable.

One thing I like about them is the fact that you can use a V-shaped router bit to score bend lines in some styles, and it will fold up pretty nice.

If you find a company that makes it, they will normally have many different types to choose from... different materials, a very wide range of thicknesses, etc.

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#9
In reply to #8

Re: Composite Panels

06/24/2011 5:42 AM

<...high weight to rigidity ratio...>

Shouldn't that read "high rigidity to weight ratio"? Just a thought....

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#10
In reply to #9

Re: Composite Panels

06/24/2011 1:08 PM

You are correct, sir. I wrote it back a**wards.

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