Does anyone of know shell element formulations (tri and quad) that have an associated differential stiffness matrix (geometric stiffness matrix)? The MITC elements are quite popular, but we can not find the associated differential stiffness matrix. The objective is to incorporate these...
Automation in the Air Dulls Pilot Skill:
http://news.yahoo.com/ap-impact-automation-air-dulls-pilot-skill-070507795.html
The parallel is that engineers are also becoming overly reliant on computers and forget (or never learn) how to be engineers. Some of the younger generation do not see a...
I really didn't know where else to ask this question, but since engineers are the final audience, I can't think of a better place.
As a working engineering, which would you prefer in a book cover?
Option 1: Faux leather with foil stamping. Just the title, author, and perhaps a simple image...
First off, I just want to say that I do not necessarily endorse the Tsai-Wu criterion, but I would like to properly state its use.
If one wants to do a progressive damage analysis, you need to separate fiber dominated failure modes from matrix dominated failure modes. The Tsai-Wu criterion has...
I am self publishing a book on composites. I have redrawn all images (i.e. they are not scanned), but many of them are similar or the same as the originals.
At first, this might seem like immediate copyright violation, but from what I understand there is more to it. Images such as pictures...
I am compiling a graph of composite use for various commercial and military aircraft. I have a few good sources where I got the following data:
http://www.espcomposites.com/composite_usage.jpg
But I could not find any good data for the F117. Any thoughts on this one or refinements to the data...
I am looking for thoughts and opinions about bearing pressure of a pinned joint, in order to develop a better bearing-bypass solution. However, there are some inconsistencies that I am having difficult resolving.
- A cosine distribution seems to underestimate the stress field. This seems to...
I am familiar with DaDT of composites in general, via working on production programs. There are some good references such as Mil-17 that I am also familiar with. However, I am looking to further improve my knowledge in this area and would like some advice on good resources, etc.
Thanks for...
Is there anything "good" out there for about 1k?
I have used Pro/E and Solidworks in the past and like those, but a little too pricey for my objective. I just want to create some 3D models and then make images of them for a book. That means I need a vector output file type though (DXF, SVG...
I am working on an engineering book and am just looking for any advice/ideas/etc.
I am not sure is how to create the final product and what software to use (currently using MS Word and will convert to PDF). But that can get pretty clunky at times with pictures, etc. Perhaps there is a better...
I am trying out the free version of Pro/E (CreO Elements Direct)
http://www.ptc.com/offers/tryout/pe3.htm
Is there a way to export a picture in a vector graphics format? If I put the solid model in a drawing, I see that I can export as a raster format (gif,jpef,tif,bmp,png), but no vector...
I am looking to create graphics for an engineering textbook. Most of the graphics will be simple 2D, but there will be a handful of 3D graphics as well.
I was thinking solidworks might be a good choice since I believe it is the most cost effective of the higher end solid modelers.
But that...
I am pretty clueless with Fortran, but would like to convert the following fortran code into a batch mode input
http://files.engineering.com/getfile.aspx?folder=2cb79806-7bfc-4809-a490-c4a1e029f8c5&file=BJSFM.FOR
- What compiler should I use? G95 seems like a good choice.
- How do I convert...
By default, most solvers seem to output element stresses and not stress at a node. In general, if I want to get a stress at a node, I would do it in the post processor.
But for what I am doing, I will not be using a post processor, but rather just reading the output into Excel. What would be...
I am looking for simple closed form initial buckling solutions for orthotropic plates (symmetric where [B]=0 and D16=D26~0). Mil-17 has several cases, but nothing for shear loading and other boundary conditions for uniaxial loading.
I have found some solutions for these, but nothing that can...
There is another recent thread similar to this, but I am looking for something that is very simple.
I only need to solve 2D plane strain/stress problems where I would create the input deck with Excel and a text file. I would then read the output back into Excel. Orthotropic material...
I am kicking around the idea of doing some simple problems via finite element in Excel. A few questions:
- Is there already something out there done with just simple formulas or VBA?
- Is there way to increase the number of columns beyond 256? If I were to program it via formula, then I...
Curious, how difficult would it be to make a fringe plot given an x,y position and the fringe variable. The x,y positions would be discrete and not a function. Similar to having a series of nodes in a plane and getting a stress component as a fringe.
Brian
www.espcomposites.com
I have an equation with several complex variable operations (add, subtract, square root, multiply, absolute value, product, divide).
I am wondering if there is a way to get a symbolic evaluation of just the real part and just the imaginary part, with a separate result for each.
I am guessing...
I am looking at converting some public domain fortran codes in Excel VBA. One option would be to recode the entire thing, but that would be very time consuming.
There appears to be a way to do it via a DLL as well, though I am not familiar with this process. Does the user still need to have...
