Recent content by Saladsamurai

Well, it's been nearly 10 years since my last post, and it's been about that long since I've thought about ideal gases, so here we go :smile:. Description of Setup I have a system that uses compressed gas cylinders as a source to slowly purge an optical payload. The source is 12x compressed...

Thanks all! It looks like CFD is a starting point. I guess I am surprised that this has not been measured experimentally yet. I would have thought that cylinders in cross flow have been looked at in excruciating detail by now.

Take a cylinder in cross flow. We know that for Reynolds number greater than 40, we will start to see vortex shedding occur. Using the Strouhal number, we can determine the frequency at which vortices will shed. Using the coefficients of drag and lift, we can determine the steady loadings on...

I am wondering what kind of approaches people take to a cyclic symmetry analysis in FEM when you have multiple repeating features that don't divide to the same integer. Take the example below for example. I have a N_HOLES = 136 and I have N_SLOTS = 52. I am not sure what to do here. The...

Homework Statement This is not a HW problem, but something I am trying to prove/disprove for my own knowledge. I have a tube pinned at both ends and inclined in the x-y plane. The pin locations can both move freely in space but subject to the constraint that the tube will not stretch or...

****NEW APPROACH**** Here is an approach I would like to to try. Assume that we have 2 "thin" cylinders of length L, inner radius R, and thickness t. Using thin shell theory we can relate the radial deflection of a cylinder to the uniform pressure acting on its internal or external face. See...

As I said, I am trying to determine the removal load. We have an interference fit. Like a shaft & collar. When it's time to disassemble, we need to know what kind of load we are looking at, regardless of how it is held.

Hi Baluncore :) I appreciate the thoughts. I do still, however, need to calculate the removal loads.

Hello. I have 2 large diameter cylindrical shells that are "rabbetted" together. I am trying to determine the approximate load required to pull them apart without much success. The parameters are as follows (all length dimensions in inches) and result in a .005" (diametric) interference...

Hello! I recently applied for a "Combustor Aero Design" position at GE aviation and I am very optimistic that I will at least get called in for in interview. The position wants someone with 3 years of experience in an engineering position. I only have 2, but I still think I have an advantage...

Here is a secondary question that I think is really more important for me to understand. If a bar is completely unrestrained and we heat it up from uniform T1 to uniform T2 it will have a thermal "strain" associated with. But is it really a "strain" in the sense that there is an associated...

Hi Aleph. OK. So what I am looking to do is to find a way to hand-calculate this to just get a rough number. Something to let me sanity check some ANSYS results. Let's assume now that a cantilevered beam starts at Tref. In the real world, if thermal BCs are applied, it is likely that the...

I am trying to understand stresses that are induced by thermal gradients. Now, I can think of a hundred different questions to ask, but I want to take baby steps to get there. Let's just talk about a simple cantilever beam in the x-y plane where the x-axis is the beam's longitudinal axis and...

OK. That makes sense to some degree. I do not have a lot of Fourier Transform experience ...well none actually ... but now I have a starting point. Thanks again Aleph!

That was what I was thinking. If the displacements were zero along those faces, so would the stresses which makes no sense. As an aside, Aleph: When it comes to harmonic indices, I am not too knowledgeable. For example, when we analyze the entire 360° body, without using a symmetry...