HiThere,

 

I’vebeen looking at your Aluminium honeycomb,

 

TheApplication is for car audio

I’veseen people glue box selections of aluminium (30x20x300mm at 3mm thick) with aPU glue like tiger seal, covering the roof of the car in aluminium. And thenonce the glue is dry fill the box section with expandable form.

 

I’mthinking about using your 20-30mm aluminium honeycomb instead – being a lotlighter and maybe even stronger! The idea is to make the roof solid so itdoesn’t flex/vibration creating or picking up sound.

I’mmainly looking for some guidance of how I would go about it, I was thinking a2part pouring form to pour into the honeycombs to make it ridge? Any advicewould be great!

Also – please see the link I’ve attached below

It’s an example of how someone has used aluminium box section(which I plan to use aluminium honeycomb instead)

http://www.talkaudio.co.uk/ipb/index.php/topic/341300-team-dls-m-sport-sound-deadening/

Many Thanks,

VincentFord

You can bond it in place no problem, however you will then need to bond on an inner skin as honeycomb works best as a core material.

Warren Penalver
Easy Composites / Carbon Mods - Technical Support Assistant

Hi Vinny

Warren would a few layers of glass mat and resin make a suitable inner skin?

Yes just not too many and go easy on the resin otherwise your roof will be very heavy!

Warren Penalver
Easy Composites / Carbon Mods - Technical Support Assistant

im sure you could do that if you wanted to. The sound deadening matt has no significant stiffness (compared to many composites).  All depends what you want.  It should stiffen the roof up doing all that anyway.

Warren Penalver
Easy Composites / Carbon Mods - Technical Support Assistant

Hi Vincent
Now I am usually very positive with my advice but after looking at what was done to the roof of that car I have to say its a crazy idea. He might as well have put a load of bricks on the roof with ducktape and get the same affect. It added no strength only weight. If he rolls the car the aluminium pieces will come off and be deadly. If you want sound deadening us something like dynomatte. If you want strength use a roll cage. If you really wanted to use aluminium honey comb and you could get the car upside down you could bond the honeycomb down by vacuum bagging and then as a second step vacuum bag a wet layer of heavy weight carbon fiber. (with an adhesive of course).
Hope this helps.
Fred
 

Surely PVC foam bonded to the roof under vac would be better at dampening, not as difficult to work with either.

IMO you are asking for trouble using ali honeycomb

The problem with such big "ice" systems is not just sound deadening but flexing of the panels itself, hence the need to stiffen the panel up.

The aluminium box section example does look a bit ropey.... That said, if he bonds in the honeycomb and skins it properly then there is no reason why it shouldnt be structurally sound.

Warren Penalver
Easy Composites / Carbon Mods - Technical Support Assistant