Maximun fabric thickness for infusion

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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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Chris Rogers	C Chris Rogers posted 5 Years Ago HOT Post Details
C Group: Forum Members Posts: 120, Visits: 933	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 numbers and not being an engineer... the 25-40mm core with 2mm of carbon skin on each side sounds ok. You can probably glue the core together to make 20 or 30mm thick panels - 20mm will be pushing it without heavier skins. You can mix the glass and the carbon but ideally only if they are going in different directions for reasons Hanaldo points out. Glass biaxial with a carbon uni aligned with load or reinforcing a flange is fine and quite common. If you can - mold in the perimeter flange (50mm+) and put some uni in there so it gets to 4-5mm thick - this will close out the edge and stiffen the whole thing - got to make a mold up-stand though. It will also be good to reinforce the landing spots of those struts with some extra reinforcement or a G10 (or similar) plate. You can make the brackets out of composite or metal but metal is easier. Realistically these will (should) still be heavy - but maybe 20kg each instead of 40...
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Massimiliano	M Massimiliano posted 5 Years Ago HOT Post Details
M Group: Forum Members Posts: 167, Visits: 1.1K	+x Chris Rogers - 9/8/2020 8:07:46 PM 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 numbers and not being an engineer... the 25-40mm core with 2mm of carbon skin on each side sounds ok. You can probably glue the core together to make 20 or 30mm thick panels - 20mm will be pushing it without heavier skins. You can mix the glass and the carbon but ideally only if they are going in different directions for reasons Hanaldo points out. Glass biaxial with a carbon uni aligned with load or reinforcing a flange is fine and quite common. If you can - mold in the perimeter flange (50mm+) and put some uni in there so it gets to 4-5mm thick - this will close out the edge and stiffen the whole thing - got to make a mold up-stand though. It will also be good to reinforce the landing spots of those struts with some extra reinforcement or a G10 (or similar) plate. You can make the brackets out of composite or metal but metal is easier. Realistically these will (should) still be heavy - but maybe 20kg each instead of 40... 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 boat builders use 10mm thick solid fiberglass for swim platforms, with a 6-10cm deep border flange to add stiffness. My platforms will have for sure the border flanges as the aluminum ones have now. My idea to use a core is to try to save additional weight. I can glue together two layers of pvc foam to get to 20mm. Do you think adding ribs (v shaped foam covered with fiber) in the underside could help adding rigidity?
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