pre-preg with aluminum honeycomb

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pre-preg with aluminum honeycomb

pre-preg with aluminum honeycomb

Author	Message
Amore	A Amore posted 7 Years Ago HOT Topic Details
A Group: Forum Members Posts: 11, Visits: 104	Hi I'm in FSAE Team and i'd like to make carbon fiber monocoque body last year our Team use aramid fiber honey comb This year we try to change core material (1/8 inch aramid fiber Honey comb ⇒ 1/8 inch aluminum Honey comb) last year we use adhesive film to combine carbon and aramid honey comb because we expect that film type adhesive will show even adhesion and it was corresponded our expectaion by using aluminum honeycomb is it okay use same ahesive film in sandwich pannel?? if not which adhesive is good for aluminum honeycomb
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Matt (Staff)	Matt (Staff) posted 7 Years Ago HOT Post Details
Group: Forum Members Posts: 680, Visits: 1.9K	Yes, it would be fine to use the same adhesive film that you used for the aramid honeycomb with aluminium honeycomb. Make sure of course that the adhesive film has been stored frozen for the whole time since last year. I hope this helps. Matt Statham Easy Composites / Carbon Mods - Technical Sales
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Jan Christian	J Jan Christian posted 7 Years Ago HOT Post Details
J Group: Forum Members Posts: 5, Visits: 63	Why did you switch from aramid fiber to aluminium honeycomb?
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Amore	A Amore posted 7 Years Ago HOT Post Details
A Group: Forum Members Posts: 11, Visits: 104	+x Jan Christian - 8/22/2017 8:46:24 PM Why did you switch from aramid fiber to aluminium honeycomb? because it's too heavy by changing core material , we want to reduce the weight of prepreg
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Fasta	Fasta posted 7 Years Ago HOT Post Details
Group: Forum Members Posts: 468, Visits: 3.5K	For very light sandwich you can use PVC or acrylic foam core instead but without film glues and this could be lighter than any nomex or alloy honeycomb due to not using film glues. Fastacraft Facebook page
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Matt (Staff)	Matt (Staff) posted 7 Years Ago HOT Post Details
Group: Forum Members Posts: 680, Visits: 1.9K	Fasta is right that in a number of situations, especially for this cores (where the weight of the bond-line is a more significant percentage of the overall core weight) that using a foam without an adhesive film (Rohacell IG-F for example) that you can reduce the overall weight of a sandwich panel. There's certainly nothing wrong with using aluminium or Nomex and there are situations where their properties are preferable over a foam but it's definitely something worth considering. Rohacell (which is a PMI foam) also has the advantage that is has a reasonably high temperature tolerance and so is well suited to use with prepregs. Matt Statham Easy Composites / Carbon Mods - Technical Sales
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Amore	A Amore posted 7 Years Ago HOT Post Details
A Group: Forum Members Posts: 11, Visits: 104	+x Matt (Staff) - 8/22/2017 10:33:57 AM Yes, it would be fine to use the same adhesive film that you used for the aramid honeycomb with aluminium honeycomb. Make sure of course that the adhesive film has been stored frozen for the whole time since last year.I hope this helps. thanks for your reply but i have a question about aluminum honeycomb sandwich pannel if aluminum is oxidized, is there no problem??
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Matt (Staff)	Matt (Staff) posted 7 Years Ago HOT Post Details
Group: Forum Members Posts: 680, Visits: 1.9K	+x Amore - 8/24/2017 7:29:16 AM +x Matt (Staff) - 8/22/2017 10:33:57 AM Yes, it would be fine to use the same adhesive film that you used for the aramid honeycomb with aluminium honeycomb. Make sure of course that the adhesive film has been stored frozen for the whole time since last year.I hope this helps. thanks for your reply but i have a question about aluminum honeycomb sandwich pannel if aluminum is oxidized, is there no problem?? Do you mean that the honeycomb you have shows signs of oxidisation (showing as white corrosion on the foil)? - If this is the case then this will certainly cause some reduction in mechanical performance. Under normal conditions it's quite unusual for aluminum to corrode like this. Or are you referring to the possibility of galvanic corrosion once you have combined the aluminium and carbon fibre into the finished panel? - If this is what you mean then although galvanic corrosion is a consideration in high risk environments (such as helicopters subject to sea-spray) it is highly unlikely to be a problem in the environment (and service life) of a formula student car. Matt Statham Easy Composites / Carbon Mods - Technical Sales
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Amore	A Amore posted 7 Years Ago HOT Post Details
A Group: Forum Members Posts: 11, Visits: 104	+x Fasta - 8/24/2017 6:09:29 AM For very light sandwich you can use PVC or acrylic foam core instead but without film glues and this could be lighter than any nomex or alloy honeycomb due to not using film glues. we've been use rohacell core but at hard point it peel off from skin so we only use at bulk head
	Reply Like 2
Amore	A Amore posted 7 Years Ago HOT Post Details
A Group: Forum Members Posts: 11, Visits: 104	+x Fasta - 8/24/2017 6:09:29 AM For very light sandwich you can use PVC or acrylic foam core instead but without film glues and this could be lighter than any nomex or alloy honeycomb due to not using film glues. when we cut off the monocoque body the rohacell is crushed and smashed so body compliance was serious problem
	Reply Like 3