Dear Onda, the issue of voids contents and their impact on mechanical properties has been widely studied by researchers and manufactures during last 3 decades. Porosities are identified in two categories, MACRO and MICRO porosities. Their impact on mechanical properties is quite different...
Dear Trenace,
Thanks for pointing out a clever question that is frequently discussed when comparing autoclave to resin infusion processes.
Note that the resins you indicate are not the most appropriate for high-end applications. In fact LR200 is a laminating resin used to make composite mold...
Yes you can thermo-form the nomex. You heat it up to 400 F (my memory may not be good here) and then press it to the desired form. This is common practice for many aeronautical pieces like radomes.
AlgoFlash,
I will certainly update on this topic once I decided for good.
Concerning the IR, I will acquire this thermal camera
JENOPTIK VarioCAM
HiRes Research 1.2 Mega
I will also update on few images later.
Acuapour is a great solution to this machining problem. Wax is also solution if you can properly decontaminate the nomex. Another solution is to make your own paste with resin mixed with hollow glass micro-spheres. In this case the edges of the nomex will be stiffer but heavier.
For a more...
Dear all,
I'm interested in acquiring a C-Scan for carbon composites NDT. Our main issue are porosites within the laminate, mainly at the core of "T" joints. To do so, I believe we need an immersion (or jet projection) C-Scanner, but I'm not an expert on this field.
I would appreciate if you...
The easiest way is to use an "instant fitting".
http://wideopentuning.com/index.php?main_page=product_info&cPath=1364_1366&products_id=4893
You can drill the fitting so that the plastic tube will pass through it. With these fittings you dont need any extra work. Just plug the plastic tube and...
I assume you are using out-of-autoclave prepregs. You have to cool-down the mold to properly use them. You can use a copper pipe molded at the shape of the composite mold and circulate cold water or use a closed circuit if available. Once the prepreg touches the surface of the mold it will...
I need to replace two key composites engineers in my team which are being taken by one of the two mayor aeronautical manufacturers. It is never easy to replace an expert with 10 to 20 years of experience and I'm frustrated with the candidates up to date.
I was wondering if there is any...
Fibersim is the best option for laminate design. It is simple to use, robust and has many design options and optimization tools. There also good piece of software offered by ESI Group and widely used in the aeronautical industry.
For analysis, Patran is largely used in industry (Nastran and...
Run a couple of DSC and DMA tests to find out the low temperature behavior of your resin and laminate. It is a pretty standard technique used in most composite laboratories.
