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Questions tagged [carbon-fiber]

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Seeking Advice: Improving Resin Application in Honeycomb Lamination for a Sustainable Project

I am trying to laminate a honeycomb structure with a fiberglass and resin reinforcement. However, I have problems because a large amount of resin falls through the holes of the honeycomb and the final ...
BeeSwell's user avatar
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Case studies in Carbon Fiber composite tubes to verify FEA

Whenever I build a model of something new, I like to have some analytical results that I can compare with my model so I can reassure myself the model is correct. I have some resources that show me ...
user3533030's user avatar
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Minimal width of a carbon fiber shell to hold a flying airship

In Aves Æternæ: Building Perpetual Flying Machines you can find the specs for an airship with a rigid carbon fiber shell. It would be around 4m long and 2m wide and high, weigh around 10 kg empty (0 ...
alexfernandez's user avatar
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Is it possible to prove that applied forces to a bicycle top tube are worse than a seatpost when using a repair stand clamp? [closed]

This stems from the idea that you should use a bike stand clamp on a seatpost, if you can, for carbon fiber (CF) bike frames. Hopefully, this would avoid the cracking of a CF bike frame. In order to ...
cocobutters's user avatar
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1 answer
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Pros and Cons of Carbon Fibre High Pressure Tank

What are the advantages and disadvantages of using carbon fibre for pressure vessel construction? Carbon fibre has a very high tensile strength and is very light-weight. According to this calculator ...
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What are the claimed advantages of using Carbon fiber for a pressure hull? [closed]

Much of the news around the Titan incident has focused on all the reasons that carbon fiber was a bad choice for the hull, but I've yet to see any discussion as to why it was chosen at all. Was it ...
BCS's user avatar
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1 answer
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Cutting carbon fiber plate with a sub-mm end mill

I have a 2 mm thick high-quality carbon fiber composite sheet. I want to cut a shape in it with a 0.8 mm diamond flute end mill. I need a cut this narrow because of the shape's detail. The shape's ...
scriptfoo's user avatar
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2 answers
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How can a material be good at damping, yet also be strong?

Good Damping Carbon bicycle frames have the unusual property that they are superior to aluminum frames in high-frequency absorption. A cyclist on a carbon-frame bike will feel tarmac chatter far less ...
Sam7919's user avatar
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1 answer
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Why is the open-front bike stem design so widespread despite that it may be inferior to the closed-front design?

Context Even major bicycle corporations have the occasional product recall on handlebars. It's easy to see why. The bike itself is a gentle, light, and nimble ~10 kg (for a road bike) object, whereas ...
Sam7919's user avatar
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What is the purpose of the woven pattern on Kevlar bullet proof jackets?

The bulletproof vest is made of kevlar fiber. The fibers are woven together. I wonder why we don't use kevlar as a sheet rather than woven fibers.
Prerna 's user avatar
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How do I calculate the strength of a carbon fiber tube?

I am not a mech engineer and have been struggling with this for a while, I feel like it is pretty straight forward but I'm missing something. The problem is a horizontal tube that is supported at one ...
Joshua von Damm's user avatar
2 votes
1 answer
153 views

Fuzzy texture in soildworks

Is there a way to add a "fuzzy" texture to a body in solidworks? Something like this: The purpose - to 3d print a body with a fuzzy surface to get better bonding Any other ideas to improve ...
Simon's user avatar
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Best DIY material for a high-torque cog or gear?

I am making a gear/cog to attach to a high torque stepper motor. I can realistically make it out of the following variety of materials: 3D printer PLA/PLA+ etc. layered PLA/PLA+ and fiberglass made ...
Chris's user avatar
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Best glue option for laminated Kevlar <> birch plywood for not peeling off

I have a problem where I glue a laminated sheet of Kevlar to birch plywood and it peels off easily I tried: Laminating the Kevlar directly on the plywood with lamenting epoxy Using the laminating ...
Simon's user avatar
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2 answers
284 views

Can carbon fibre be injection molded?

I found very little information about that, but it says that its technically possible, but then why it isnt used instead regular carbon fibre machining? It sounds way easier...
Name's user avatar
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which kinds of lubricant / grease can attack carbon fibre components and which kinds cause no harm or damage?

It's easy to find many non-expert opinions about the dangers of using grease on carbon fibre components. Which kinds of lubricant cause no harm to carbon components, and which, if any, can damage them?...
Tim's user avatar
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Is it possible/practical to mold a single hollow piece of carbon fiber with a sealed vacuum in the middle?

Let's say I design a simple piece of carbon fiber to be manufactured, in the shape of a simple cylinder with a diameter of 2cm and a height of 3cm (pretty small). Is it possible and/or practical to ...
Giffyguy's user avatar
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1 vote
1 answer
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Database for stiffness matrix? [closed]

I have searched everywhere for the stiffness matrix of GFRP, but there isn't a single paper or site that experimented the full matrix. Is there any sort of database for the stiffness matrix of many ...
Andy_ye's user avatar
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2 answers
2k views

Welding Carbon fibre

How do you weld carbon fibre to another piece of carbon fibre? If it can't be welded together what other solutions are there for connecting carbon fibre together?
Gabriel Kusiak's user avatar
1 vote
2 answers
377 views

Why do they vacuum pump the carbon fiber fabric?

I have seen plenty of YouTube videos in which they use carbon fiber fabric to build various things. One such channel is Mike's Patey's channel where he makes amazing aircrafts from carbon fiber. In ...
Efthymios Kalyviotis's user avatar
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What is the compressive strength of carbon nanotube reinforced polymer?

What is the range of compressive strength of carbon nanotube reinforced polymers? Although CNT's themselves have phenomenal (oriented) compressive strength, and one can find references to that, CNRP'...
James Bowery's user avatar
2 votes
2 answers
83 views

Carbon Nanotubes as muscles?

I was wondering why carbon nanotubes are not used as artificial muscles yet? I mean they behave similar to real muscles, only that they expand horizontally. What are the current challenges that ...
John Doe's user avatar
1 vote
2 answers
58 views

What steel to use? What thickness and width? What angles to use? [closed]

I am trying to develop my own spring steel version of a carbon fiber running blade that you might see in the paralympics. Except mine is for someone who still has their foot/leg. Nothing like that ...
Jeff Block's user avatar
1 vote
1 answer
706 views

Why are parts from carbon fiber stiff?

I have noob question,I dont understand why are parts made from woven carbon fiber composite stiff. I understand that carbon fibers are strong and have high Young modulus,its stiff and strong when the ...
wav scientist's user avatar
2 votes
1 answer
348 views

Is triaxial carbon fiber gimmick?

Is there any benefit to using triaxial weave pattern instead of common twill?
wav scientist's user avatar
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1 answer
84 views

Why is graphlite so strong in tension?

This comes from the composites store website: These high performance carbon shapes are produced by packing a high volume of carbon fiber into epoxy resin under tension resulting in an unmatched ...
juggler's user avatar
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3 answers
67 views

home-made pultruded components?

If I make a sandwich of wood, thin plastic, carbon-fiber tow (cut to about a foot long) impregnated with epoxy to the right ratio, thin plastic, and wood, and clamp it together and leave it, will I ...
juggler's user avatar
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2 votes
3 answers
2k views

How is a carbon fiber chassis made one piece?

How is such a one piece car chassis from carbon fiber made at one piece? Do they make the parts individually and bond it some way that it is extremely durable bond? What bonds are really durable for ...
user2789433's user avatar
3 votes
4 answers
1k views

How can I stop carbon fibre mat from fraying?

I want to use a woven carbon fiber tube in cloth form to act as an acoustic absorber in a 40 mm internal diameter pipe. The bad news is that it has to carry a variety of solvent/air mixtures at ...
Dirk Bruere's user avatar