Maximun fabric thickness for infusion

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Maximun fabric thickness for infusion

Maximun fabric thickness for infusion

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Massimiliano	M Massimiliano posted 5 Years Ago HOT Topic Details
M Group: Forum Members Posts: 167, Visits: 1.1K	Hi, what is the recommended maximum fabric thickness for a one shot successful infusion, given a 250 cm2 square area? Thanks Edited 5 Years Ago by Massimiliano
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Lester Populaire	L Lester Populaire posted 5 Years Ago HOT Post Details
L Group: Forum Members Posts: 311, Visits: 13K	+x Massimiliano - 9/7/2020 9:36:15 AM Hi, what is the recommended maximum fabric thickness for a one shot successful infusion, given a 250 cm2 square area? Thanks Depends in the fabric architecture and fibre type. I have done plates of 20mm thickness in one go without issue, and have done layups of 2mm in several steps to avoid problems with porosity.
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Massimiliano	M Massimiliano posted 5 Years Ago HOT Post Details
M Group: Forum Members Posts: 167, Visits: 1.1K	+x Lester Populaire - 9/7/2020 10:29:01 AM +x Massimiliano - 9/7/2020 9:36:15 AM Hi, what is the recommended maximum fabric thickness for a one shot successful infusion, given a 250 cm2 square area? Thanks Depends in the fabric architecture and fibre type. I have done plates of 20mm thickness in one go without issue, and have done layups of 2mm in several steps to avoid problems with porosity. I need to build a couple of swim platforms for my boat. Layup will be fiberglass + carbon + Kevlar, two skins with inner pvc foam core (3mm skin on each side + 10 mm foam core) I need them to be as light as possible, therefore the use of carbon and kevlar. I would like to infuse it in one shot if possible.
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DD-Compound	DD-Compound posted 5 Years Ago HOT Post Details
Group: Forum Members Posts: 25, Visits: 1.1K	That’s no problem. I have infused monolithic UD Carbon laminates with 120mm in one shot. Boat hills with much more layers and core also in one shot. But a 250cm2 platform might just be enough for one foot.
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Maximun fabric thickness for infusion

mporta71 - 5 Years Ago

Depends in the fabric architecture and fibre type. I have done plates of 20mm thickness in one go without issue, and have done layups of 2mm in several steps to avoid problems with porosity.

SleepingAwake - 5 Years Ago

I need to build a couple of swim platforms for my boat. Layup will be fiberglass + carbon + Kevlar, two skins with inner pvc foam core (3mm skin on each side + 10 mm foam core) I need them to be as.....

mporta71 - 5 Years Ago

That’s no problem. I have infused monolithic UD Carbon laminates with 120mm in one shot.Boat hills with much more layers and core also in one shot.But a 250cm2 platform might just be enough for one.....

DD-Compound - 5 Years Ago

What they said! If you're using common loose weave or stitched material you should be fine. Make sure the holes in the core are pretty close - like a 50mm grid. What are you thinking for a laminate.....

explorecomposites - 5 Years Ago

Like Chris, I'd question if you need the Kevlar. Kevlar is only useful if the laminate is very likely to break, in which case the Kevlar will hold it together. In something like a race car nose cone,...

Hanaldo - 5 Years Ago

Hello Hanaldo and others, thank you for your contributions. Please see attached pictures. The stuff outlined in red is what I want to make. The purple line is where it is fastened to the transom. The...

mporta71 - 5 Years Ago

In your case there is bending and torsion. A 10mm core will be way to thin and will flex.You can calculate a part by stress or stiffness. If you calculate by stiffness in most cases you are also safe...

DD-Compound - 5 Years Ago

I agree with DD Compound - you need thicker (and maybe higher density) core. That aluminum is rugged! If you're going to use Kevlar, put it in the top skin so it is loaded in tension. Not having any....

explorecomposites - 5 Years Ago

Hi, thank you. Structures like cleats and ladder will have a wood insert in the foam and a metal plate in the underside. Brackets to fasten the supporting pipes to will be made of metal. Usually boa...

mporta71 - 5 Years Ago

I'm convinced, the flat cored plate has not enough torque rigidity. The fixing flange is the critical point where the leverage effect it the highest. I would suggest something like a foam cored pan.....

Rosta Spicl - 5 Years Ago

Sorry, I tought you would like the original U profiles support system put out and replace by laminated structure all around, but it seems not possible - welded to hull. If the panel is fixed on the.....

Rosta Spicl - 5 Years Ago

Hi Rosta Spici, what do you mean by lattice bracing? Sorry, I don't understand

mporta71 - 5 Years Ago

See the waffle. That's generally a pan, supported by lattice structure from the bottom side - it means bottom area of pan filled by crossing ribs fixed to the side flanges of pan. Understand?...

Rosta Spicl - 5 Years Ago

Thank you, understand! You got me hungry too :-)

mporta71 - 5 Years Ago

Can anyone recommend number of layers and carbon fiber type(s) to achieve the 2mm thickness?

mporta71 - 5 Years Ago

You can say roughly 1000g/m2 per mm. We mostly use a 1000g quadraxial two layers each side. That is a laminate that suits to a lot of scenarios.If you can’t get that use maybe 4 layers of 600g Biax.....

DD-Compound - 5 Years Ago

Thank you DD-Compound! I am not able to source any quadriaxal carbon from my suppliers, can a biaxial +/-45° alternated with a twill do the same job?

mporta71 - 5 Years Ago

Quadraxials are essentially just 2 layers of biaxials stitched together with one layer flipped over for balance. So yes, it would do the same job - a quad would just save you the effort.

Hanaldo - 5 Years Ago

Hi, can you recommend best way to bond PVC foam sheets? Would micro fibers thickened epoxy do? (About holes: I will perforate after the bonding, so no problem about closed holes)

mporta71 - 5 Years Ago

Thickened epoxy is fine. It is critical to completely cover both surfaces so you have no voids. And then you need to press the sheets together with a very even pressure - vacuum is the easiest way to...

Hanaldo - 5 Years Ago

Thank you, will do as you suggest!

mporta71 - 5 Years Ago

Yes, that will do the same job. A good help is also the R&G or Saertex Material calculator for weights/resin and thickness

DD-Compound - 5 Years Ago

I would not recommend to bond but if you can also do that during infusion. Place a flow layer between the cores and the resin will bond it during infusion. Otherwise I would use something like a...

DD-Compound - 5 Years Ago

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