Hi guys,
Im working on simulation of telescopic boom. I make buckling analyses of pair of sections and adding stiffeners to have higher BLF. Problem is that if I set simulation to find 49 modes all of them are negative. When I set 50 modes, simulation finishes with fatal error that, Im looking...
Im working on boom sections static and buckling simulation. Sections are shell models. In reality there are nylon plastic wearpads (also for sliding) which transfer loads from one section to another. They transfer only pressure of course. Im trying to simulate them using patern of points in...
thanks for excellent reply allcomposites.
I made a special test on glass, so Im able to see tool side of composite. There are no visible voids, pockets or anything during infusion. Whole piece is infused beautifully. Problems occur after clamping inlet port. After a while small voids are made...
I know that in RTM after injection a pressure is used to reduce voids. But there are constrains from both sides of tooling, so it don't have any influence on fiber/resin ratio. I get your point. You are absolutely right about void size/vacuum level. It will be really better for void size to...
Sorry but I have never ever heard/read about clamping vent line and not feed line. Its not a standard procedure and it will never be. You will NEVER have a good fiber/resin ratio with your ,,standard procedure,,. After resin flows in the layup it is in equilibrium with outer atmosphere so there...
I'm clamping feed side of the tube while resin is in the tube. Clamping off vacuum side will not have any effect on air bubble expanding. Resin will be under normal outer atmospheric pressure and there will be no visible air bubbles. Like it is in resin cup. But I get your point. Thanks.
But if...
Nice to ,,read,, you again CP ;)
My infusion setup is very simple. I stopped trying to infuse usable parts, instead I came back to small rectangle (150mm x 80mm) test pieces on piece of glass so I can control and change some parameters and compare results. I use Frekote 770 NC as release, few...
Hi,
I have a problem with vacuum degassing of epoxy resin (300-500mPas viscosity) before resin infusion. After mixing I put cup into vacuum chamber and make 28,8" of vacuum (I'm in 1000feed above sea). I can see that the bubbles are forming and rising. Lot of them will pop, but I still have...
