Questions tagged [carbon-fiber]

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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.
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1 answer
606 views

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 ...
1 vote
1 answer
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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 ...
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1 answer
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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 ...
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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 ...
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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...
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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?...
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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 ...
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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 ...
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1k 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?
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234 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 ...
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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'...
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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 ...
1 vote
2 answers
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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 ...
1 vote
1 answer
475 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 ...
2 votes
1 answer
298 views

Is triaxial carbon fiber gimmick?

Is there any benefit to using triaxial weave pattern instead of common twill?
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1 answer
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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 ...
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3 answers
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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 ...
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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 ...
3 votes
3 answers
862 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 ...