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Construction Materials

Posted by: box - Thu Nov 21, 2013 7:32 am
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Construction Materials 
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Space Walker
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Post Construction Materials   Posted on: Thu Nov 21, 2013 7:32 am
I was wondering about what materials can be used for in orbit habitat construction, and where one could find information about materials used. I mean books or journals.

Is most of this information confidential and guarded by space agencies and private companies?

More specifically I was wondering about plastics, and how much are they utilised if at all in the construction of hulls or external covers.

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Post Re: Construction Materials   Posted on: Thu Nov 21, 2013 1:15 pm
Google is your friend. Most general information can be found from there, including book descriptions. From that you can find the proponent agencies and manufacturers that you can contact to try to get specifics. Even private, semi-secretive companies like Bigalow should be willing to describe how they intend to construct their habs.

In general, most stuff that has or is on-orbit uses an aluminum alloy rigid pressure hull with many layers of aluminum mylar insulation with a smaller number of layers of a dacron/nylon fabric as a protective covering.


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Post Re: Construction Materials   Posted on: Thu Nov 21, 2013 5:57 pm
I am not sure, but it seems like carbon fiber, and graphene would make a good wall, as carbon has the radiation reflecting properties, and is tough as nails.

they have recently begun making long "Strings" of graphene, that can be woven into a lattice,

this could be flexible, and incredibly tough while also being wires.

I imagine one day a ships hull will also be it's power supply/supercap and computer.

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Post Re: Construction Materials   Posted on: Thu Nov 21, 2013 6:29 pm
Also there is this - http://en.wikipedia.org/wiki/Radiation_ ... _shielding

So a composite of many materials absorbs many types of radiation...

So some type of mix of rigid, high tensile, radiation absorbing and high hardness values is needed.

1- Impact
2- radiation
3- stress
4- weight
5- duel usefulness

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Post Re: Construction Materials   Posted on: Fri Nov 22, 2013 1:23 am
It's going to be... a while. Engineers are a notoriously conservative bunch.


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Post Re: Construction Materials   Posted on: Fri Nov 22, 2013 1:49 am
http://www.dailymail.co.uk/sciencetech/ ... phant.html

http://www.extremetech.com/extreme/1643 ... conductors

http://www.youtube.com/watch?v=G-AF7_Blj_k

http://cleantechnica.com/2013/10/12/gra ... rch-finds/

:D

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Post Re: Construction Materials   Posted on: Fri Nov 22, 2013 2:33 pm
Doesn't matter. The procedures and requirements for certifying a material or fabrication technique for aerospace and esp. for commercial aircraft are... laborious.

Yeah at some point someone will, but don't hold your breath.


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Post Re: Construction Materials   Posted on: Fri Jul 11, 2014 11:51 pm
Hmph...

I imagine the bill of materials (BoM) should look as simple and as efficient as possible. Space-based systems are already too complex, so adding more complexity will ensure failure at least occasionally. In order to reduce costs, the BoM should probably be divided into payload types, starting with the ones capable of handling bone-crushing accelerations and ending with the most fragile ones:

Payload Type 1
This is the most expensive kind of payload because it's the heaviest. Robust payloads (e.g. structural elements, base construction materials) are the heaviest and can withstand hundreds of thousands of G's, so using ground-to-orbit payload cannons instead of rocket fuel would be wise.

Cartridges pre-filled with 3D-printer-ready mixtures of particles such as sand, steel, and plastics should make it possible to construct anything you need directly in-orbit. Some motors and actuators may also qualify as a Type 1 payload. Delivery of the this type of payload can be as simple as loading it up into a giant electromagnetically-accelerated cannon and flipping a switch.

Payload Type 2
The initial payload, carrying a small solar powered multi-material 3D printer, should be able to withstand a few hundred G's. Most electronics and scientific instruments should be okay.

A traditional rocket may be used to relatively gently deliver all Type 2 payloads. Zombies should theoretically qualify for this payload type.

Payload Type 3
This is the trickiest one. A living organism should never be allowed to experience more than a few G's, and the probability of a fatal system failure must be well below what current delivery mechanisms have to offer.

Payload Type 3 vehicles are yet to be designed for commercial applications. Plants and animals are your most precious payload, falling into this category. In certain situations, they can be transported via Type 2 delivery system in their pre-germinated seed form.

Any other suggestions that could make the BoM less prohibitive?


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