Roll Wrapped Vs. Pultruded Carbon Fiber Tubes
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- เผยแพร่เมื่อ 16 พ.ค. 2021
- John and Mike explore the primary differences between a roll wrapped tube and a pultruded tube. Pound for pound it is likely that there is more pultruded tubing (& solid rods) in the world than roll wrapped. Why is that? Check out this video to learn more.
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Couldn't you twist a pulltruded tube to give it a change the direction of the fiber then change dies and twist a second layer over it twisting the other direction?
Any proven benefit to a "hybrid" tube with a pultruded core and roll wrapped surface? For example if you pultrude to a couple millimeters under the OD and wrap the rest. Any delamination concerns?
Pultruded has no benefits whatsoever so there would be no point in making a hybrid unless it was really to cut corners.. If you want strength durability and reliance then its wrapped, If its something that your not overly concerned about taking stresses and loads then pultruded might just get you there.. What annoys me is when you buy a product and they wont tell you which it is.. I buy quite a lot of arrows for target practice, and sometimes get caught out with the arrows being pultruded, they don't last a month but the rolled shafts will last a year easily before there tore up... I'm not the best shot ;]
Great dialogue and as @petrokemikal noted, roll wrapped tubes often yield better overall characteristics all things considered. Pultrusions are great when a low cost, low criticality part is needed and or you only need to hold things in tension and are not subjecting said structure to torsional, or buckling / compression loads.
@@petrokemikal I suppose one could look at the approach as "cutting corners", however if you need a relatively large diameter rod with specific performance characteristics that could possibly be met with a pulltruded core wrapped in a several layers of roll. it seems solid roll might be unnecessary overkill. Similar to foam core boatbuilding.
Arrow shafts are slim by design. I can see why there might be little point in wrapping a pulltruded core with roll for something that's maybe 5/16" OD. But there may be a practical reason to combine the two for something like a composite driveshaft or similarly large diameter objects.
I'm just throwing out questions as someone unfamiliar with pultrusion. As I began to research it and read about its rising popularity in construction, I couldn't find any instances in which pultrusion and roll wrapping were used together. Thanks for your insight, Petro. Much appreciated.
So pultruded tubes are stronger in bending forces along the length?
Pultruded tubes have one weakness. They tend to kink and then fracture. this is because the fibers are all running in the same direction. roll wrapped tubes have some fibers running in the opposite direction to increase tubular strength and prevent kinking. So, in practice, roll wrapped tubes are more durable in bending. But it all depends on the loads and tube sizes, etc.
What’s a good join adhesive for tube ends?
3M Dp420 or Loctite E-140HT
Super glue(ca glue ) king of works
Which is better for a pressure vessel gloss and Matt or twill and plain and what weave
Pressure vessels are a function of fiber orientation, so depending on the internal pressure you need, will determine the layup you will need. You are commenting on the the roll wrap and pultrusion video, but you would be much better off with a filament wound tube designed for pressure. With filament wound tubes we can use hoop plies to increase burst strength. Send us an email and we can help you get started to know what kind of layup you need for your application.
What tube would be best for holding 5000psi of air? Im making a pcp air tube
That is ALOT of internal pressure. Sadly we will not have a tube suitable for those levels.
I found one , thanks though@@RockWestComposites
PROBLEM : I am going to make a GOAT Single Seat Glider. Its an AL tubing 6061 T6 structure all arround. In India we have NO SOURCE for 6061 T6 Al tubing especially the sizes I need....and importing is mental.
SOLUTION ? CF raw material is available and raw material infact is also easily importable ... So make the Tubes out of CF
QUESTION : For a given size of AL ...how do i figure out the EQUIVALENT CF solution ?
MEEEOW???
Hello! importing is mental, agreed. however fabricating by hand without the equipment is also kinda mental and likely more expensive than the former. There is no easy answer for direct swap of AL to CF howoever we can share the in general, CF will be 30% stiffer and about 30% lighter given no dimensional changes otherwise from AL. MEEEOW :-)
Zzz
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3 mins of my life wasted. Is it 0.000000000000000000001% difference or it is 99999999999999999999999999% difference in stiffness?