I am using MCAD Prime 3.1 at work. I have a couple of issues with it so far. (I have lots of experience with MathCAD prior to PTC, and still run that for my own business.)
1) When I copy/paste an image from word or drag and drop it into the MCAD file, it won't let me save the file after that...
I have, in the past, read at least a couple of engineering related books (as opposed to scholarly theory) about applying FEA to various structures.
In general, if possible when modelling aircraft structure, it is better to use 'lower dimensional' elements. This is the generally accepted means...
1) Shims in aerospace applications don't have to be tapered.
2) The term filler and shim are more or less interchangeable in most cases, especially with repairs. So the terminology can get a bit confusing.
3) A structural shim, in this case would have to extend one row of fasteners further...
rb1957, that's typical of how the FAA operates with military programs. They help with the certification, then the OEM adds exemptions as needed to actually operate the aircraft in the designed manner. It's not silly, so much as practical considerations that the aircraft operates in an airspace...
You might have to get a subscription to IHS or a similar service to find what you're looking for. I don't think that data exists for that particular HT/Alloy, so you would either have to do the experiments (long and time consuming) or find a way to justify using a similar alloy/HT.
My company...
Most General Dynamics designs would have continuous longerons with cutouts in the BH to allow them to pass through. This is based on fairly recent designs I've seen from GD, and their design handbook from the 70s.
The min is 2D for metals. I think the standard is 3D for (most) composites.
There's no general max for metals because it would be (as rb notes) mostly dependent on the configuration and loads.
For a composite floor panel, you would not want too much E/D mostly because you want floor panels...
My experience with composites is fairly limited, but varied (solid laminates, honeycomb panels, of AL-Al, Carbon, Kevlar, and glass).
I assume when you talk about porosity, you mean in a solid laminate?
The number of plies (and total thickness of the part), the pressure used, the minimum...
It seems would at least need something feeding air into the area to be cooled for this to work. Just have an exit near a low pressure area would reach semi-stable equilibrium without a way to flow air into the area from elsewhere (maybe you have that already, but it wasn't mentioned).
As...
Prime 4.0 won't copy/paste into Word. Glad I got the free version first. I guess I'll be uninstalling this from my machine. Now to go find a feedback form in case they care. :)
I still use my old version on my own machine, but this new version is like learning a completely different software and...
SWComposites, I have some references, and since I work for an company that is a .edu, I have access to a lot of research and some industry studies. I've now got 4-5 papers that I'm going to start going through. Any additional references are welcome though. I've got a fair bit of industry...
I'm helping write/review the process specs for some of our repairs, particularly with regard to composite (solid laminate and honeycomb).
We have a very old spec that just says, "Inspect for moisture and corrosion." <--- That's not vague at all. It doesn't call out a process or process spec...
