Free fea software review

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IceBreakerSours, as I mentioned previously, my goal in starting this thread is to obtain useful feedback from current Strand7 users. Strand7 originated in Australia, where it has a substantial and very loyal following.

I suspect it is the No. I think it is the best "bang for your buck" FEA available. It will handle pretty well all of your basic and mid-level FEA requirements, and will even do some surprisingly "high-end" stuff as well. The user interface is very easy and intuitive to learn, and it has a good complement of solvers and post-processing tools, etc. Probably the two main issues which mean I have to occasionally look elsewhere for specific applications: 1.

That is, if you are given a CAD model to analyse, and you need to modify the basic geometry such as adding or moving a stiffener , Strand7 does not have the tools to manipulate the imported geometry before meshing, so you need to go back to the generating CAD application, and do your geometry changes there, then re-export the geometry to Strand7.

It does not have a tool for "mid-plane extraction" the ability to take a solid model of a thin-shell structure, and automatically simply to a properly-connected single-surface representation of each plate. This makes creating good quality plate-shell meshes from imported solid geometry of welded steel platework etc a very intensive manual task. Even with these limitations, it is highly recommended. Why not download the free demo from the Strand7 website to see if it will do what you want?

IDS and jhardy1, thanks for your responses. I downloaded the free demo several months ago, and did a few verification models, however, I only had so much time to "kick the tires" so to speak.

I have gotten a lot of helpful feedback from the Strand7 rep that I am working with, however, I wanted to also get feedback from Strand7 users who are not trying to sell the software. One specific question I have is whether or not it is worth spending a little extra to get the sparse solver, or if the skyline solver included with the basic package will be sufficient.

Any thoughts? On the sparse solver question, it depends what you are using it for, but to give some indication I have run a couple of my typical for me models with the sparse solver and the skyline solver: Staged non-linear analysis, 13 stages with iterations per stage, say iterations in all, 2D model with nodes, 65 beams contact elements and 8-noded plates: Sparse solver 23 seconds; Skyline solver 43 seconds Linear analysis with one load case.

The second model was actually taken from a staged non-linear analysis with 35 stages and about 20 iterations per stage, so it really needs the sparse solver to be practicable. In summary, for small to medium linear 2D analyses it wouldn't be worth worrying about, for staged non-linear analyses of even quite small models it gives a reasonable saving, and for 3D non-linear work with brick elements other than small models it's pretty well essential.

I agree with Doug. Strand7's sparse solver can make a HUGE difference to the solution times, and is well worth its additional cost. Indeed, my own results suggest that for such problems, using the Skyline Solver with a well-sorted matrix can actually be faster than the Sparse Solver - but we are comparing run-times of just a few seconds either way, so it doesn't really mean much.

I guess the simple "brute force" approach on a small tightly-banded matrix may actually be more efficient than the "computational overhead" required for the Sparse Solver? On such models, elapsed times can be five times or more faster. Typically, launch the Solver when you leave work, and hope that you have meaningful results when you come back to work tomorrow.

For "instantaneous" problems, it really doesn't matter much which Solver you use. Where the Sparse Solver comes into its own is that it may turn a "Lunch beak" problem into a "Coffee break" problem, or an "Overnight" problem into a "Lunch break" problem. If money is tight, just buy the regular Skyline Solver initially - you can always add the optional Sparse Solver later if necessary.

I use Strand7 quite a bit but not full time , and love it. I have all the options, but don't have time to explore all of them. In one of my models I had about , bricks, lots of plates, etc. I would personally place Strand in the same league as SAP From what i can recall, it is pretty cheap for the amount of punch you get.