Maximun fabric thickness for infusion


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Massimiliano
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DD-Compound - 9/12/2020 5:52:09 AM
For the core you can bond 2x10mm together but take care it’s bonded proper, otherwise it will delaminate at neutral axis and you will loose stiffness and make sure the holes are not closed, otherwise your infusion will fail. 

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)

Hanaldo
Hanaldo
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Massimiliano - 9/14/2020 12:59:31 PM
DD-Compound - 9/12/2020 5:52:09 AM
For the core you can bond 2x10mm together but take care it’s bonded proper, otherwise it will delaminate at neutral axis and you will loose stiffness and make sure the holes are not closed, otherwise your infusion will fail. 

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)

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 achieve this. 

Massimiliano
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Hanaldo - 9/14/2020 2:16:37 PM
Massimiliano - 9/14/2020 12:59:31 PM
DD-Compound - 9/12/2020 5:52:09 AM
For the core you can bond 2x10mm together but take care it’s bonded proper, otherwise it will delaminate at neutral axis and you will loose stiffness and make sure the holes are not closed, otherwise your infusion will fail. 

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)

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 achieve this. 

Thank you, will do as you suggest!


DD-Compound
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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 thixotrop paste, made from aerosil and microballoons with resin.
We sometimes use Gflow500 from Chomarat between the cores of we have to.

http://www.talkcomposites.com/Uploads/Images/f1d078f0-feab-4db2-8f2f-f009.png
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