Page 2 of 3

Re: Stiffening...

Posted: 18 May 2012
by mat_the_cat
Do you actually know that the tube will bend under the strains you'll be putting it under. It may well be than unless the tubular shape is crushed, it will be strong enough in which case anything to keep it retaining its shape will do. The chemical metal epoxies I've seen like JB Weld still have a much lower tensile strength than steel though, but can you use concrete with a bit of rebar? That way the strain will be transferred to the bar rather than just the outer tube.

Re: Stiffening...

Posted: 18 May 2012
by mickey taker
i think the "complex shape" of the tube would prevent you from esing rebar Matt

Re: Stiffening...

Posted: 18 May 2012
by Vanny
just inject plastic into the fucker. Though to be honest, without any idea of forces, exactly what type of plastic is anyones guess.

you could go get a copy of Cambridge Engineering Selector which will tell you exactly what you can and can't use based on the parameters you've given.

Or, if you don't have £800 to spend, try MatWeb website.

Re: Stiffening...

Posted: 18 May 2012
by jayw
Vanny wrote:Or, if you don't have £800 to spend, try MatWeb website.
[alone]

Re: Stiffening...

Posted: 18 May 2012
by Vanny
google #MatWeb and its the first link

start a search from Physical Properties and i would suggest you start by looking at room temperature plasticity, melting point (because you dont want it melt on a warm day) and if you look into polymers i think you can select thermo SET plastics.

It's straight forward, if you know what your looking for, if you dont know what a Charpy (Pronounced 'sharp-eeeee') Impact rating or Brinnel Hardness value are, then it might not be too much use.

Though if you don't know about Charpy and Brinnel, you might want to google it because you'll never look at hammering a nail into a piece of wood quite the same way again.

Re: Stiffening...

Posted: 18 May 2012
by Philhod
In large fabricated structures where the thickness of columns and beams has been reduced drastically (for other reasons)
The medium of choice is SAND. I wasn't being facetious because I eas walking around in it. It will compact and isn't affected by heat of cold and doesn't get air bubbles in awkward shapes either. 8)

As you will be aware, I'm back in blighty once more and fucking freezing it is too. :evil:

Re: Stiffening...

Posted: 19 May 2012
by Father Ted
Vanny wrote: Brinnel Hardness value
Brinscal Hardness values are being able to go out in winter wearing only a T Shirt and jeans and not have your nipples go stiff, Thats Hard.

Re: Stiffening...

Posted: 20 May 2012
by docchevron132
:lol: :lol: :lol: :lol:

Re: Stiffening...

Posted: 20 May 2012
by Father Ted
Image

Re: Stiffening...

Posted: 20 May 2012
by docchevron132
:lol: :lol: :lol: :lol:
if only I could find a willing rabbit hole..

Re: Stiffening...

Posted: 20 May 2012
by Philhod
Ghengis Khan came from Brinscal

Re: Stiffening...

Posted: 21 May 2012
by jayw
Sorted. forund a high-density, high tensile PU resin... Only £70/4kg... Bargain! :roll:

Cheers chaps!

Re: Stiffening...

Posted: 22 May 2012
by docchevron132
Damn you! I still want to know what it's for!

Re: Stiffening...

Posted: 22 May 2012
by mickey taker
:D

Re: Stiffening...

Posted: 22 May 2012
by Vanny
Like i said
Vanny wrote:just inject plastic into the fucker
Gawd its hard being as good as me ;)

I agree with doc!

Re: Stiffening...

Posted: 22 May 2012
by mat_the_cat
A giant (or life sized?) dildo?

Re: Stiffening...

Posted: 22 May 2012
by jayw
mat_the_cat wrote:A giant (or life sized?) dildo?
Same thing where i'm standing :wink:

Ask me again in March... (2013) :lol:

Re: Stiffening...

Posted: 22 May 2012
by docchevron132
2013? I might be fucking dead by then!
I'll come back and haunt you!

Re: Stiffening...

Posted: 22 May 2012
by jayw
Go for it, be nice to have you around :lol:

Re: Stiffening...

Posted: 22 May 2012
by Father Ted
So, is he getting married next year? If so what can he be wanting to epoxy fill?

Im thiking rude things here