Torsional and Warping Constant 9

[dik]

Does anyone have a good approximation for the Torsional and Warping constants for the following?

Thanks, in advance...

Rather than think climate change and the corona virus as science, think of it as the wrath of God. Feel any better?

-Dik

 

[dik]

I've been using SMath for a decade or more and find it an excellent program for engineering. There are a couple of little issues that I've learned to work around. It's like a free MathCAD type of program that handles units, too.

I use to program in half a dozen different languages, but have grown too old for that. I was big on Basic, and had several programs with over a meg in source code. I preferred it to C; Basic use MS's fortran math library which was significantly faster than their C package. My first finite element programs were done in using MS PDS Basic 7.1. At the time, because of the slowness of processors, I included a lot of Assembly with my stuff and had a fairly robust Assembly library for Basic. My later stuff was done in Delphi.

Northwoods is a name I selected about 30 or 40 years ago when I used to write computer programs... It was a stylised northern windswept tree.

Rather than think climate change and the corona virus as science, think of it as the wrath of God. Feel any better?

-Dik

 

[KootK]

I'm intending to do a deep dive on using SMath in the near future. If I could deploy .exe compiled worksheets with MathCAD, I'd be one happy camper. If SMath can do a decent job of comboboxes and databases AND doe the .exe thing, that might be a great solution for me. My only real concerns with SMath are:

1) It never ends up looking attractive. This I can live with.

2) Longevity. Will it get sold? Die when the owner dies? Become truly open source and long lived?

 

[dik]

I think it's attractive... you've never seen my handwriting...

Rather than think climate change and the corona virus as science, think of it as the wrath of God. Feel any better?

-Dik

 

[KootK]

Touche.

 

[RFreund]

Dik - Very cool, thanks for sharing!

Kootk - Also thank you for sharing.

FWIW - I am an avid user of SMath. The Combobox does allow you to preload all shapes and properties. I wrote countless calcs in excel, then Tedds, and finally SMath. It's a great alternative to Mathcad as you mention. I'm just not a big fan of spreadsheets for most calculations b/c it is so hard to see what is going on (even though IDS will defend them to his death ).

I share your concerns.
To address #1 - you kinda need to cave and use "descriptions" (right click on the variable and choose description). Doing this allows you to add a lot on a page. Also, you kinda need to commit to some sort of Font styles for headers, sections, sub-sections, calc text. But none the less people will still complain about the appearance.

For #2 - I hope that Andre will at least give the courtesy of a heads up before he does anything crazy. But ya never know. If it was reasonably priced, I wouldn't mind paying for it.

Attached is an SMath file for steel wide flange design. Also an SMath file on how to import shapes from Excel.

https://files.engineering.com/getfi...file=Steel_-_Member_Design_-_W_-_V3_-_Temp.sm

These must be in the same folder:

https://files.engineering.com/getfi...-_Section_and_Matererial_Properties_Import.sm

https://files.engineering.com/getfi...b77776c48&file=AISC_Shapes_Material_14.1.xlsx

 

[KootK]

Wow, thank you so much RFreund. I may have to enlist you and dik as my personal SMath tutors when the time comes. And I agree, I'd pay for SMath. Easily $50/seat/year or more. I actually carry my own MathCAD license because I like it so much. But, then, I'm an island and can share nothing. A while back, I wrote what I consider to be the world's best load takedown spreadsheet in MathCAD express. It was a really slick application of array handling etc. I've always meant to clean it up and share it here but, now, I'm thinking that I might try to reproduce that in SMath for sport.

 

[dik]

Bilingual? Voici le duck... it's a canard.

for those that aren't bilingual; canard - piece of information that is intended to deceive people...

I'm not bilingual; I studied French for 7 years at school and have only read two French things... "Beton Precontraint" by Guyon about 50 years back, and a geotech report for an airport in Quebec about 45 years back.

Rather than think climate change and the corona virus as science, think of it as the wrath of God. Feel any better?

-Dik

 

[dik]

I really like the array stuff and the different columns can have different unit values.

Rather than think climate change and the corona virus as science, think of it as the wrath of God. Feel any better?

-Dik

 

[dik]

Weld group with arrays...

[URL unfurl="true"]https://res.cloudinary.com/engineering-com/image/upload/v1641523166/tips/Weld-Group_W_qpxiuy.pdf[/url]

[URL unfurl="true"]https://res.cloudinary.com/engineering-com/raw/upload/v1641523167/tips/Weld-Group_W_yljram.sm[/url]

Rather than think climate change and the corona virus as science, think of it as the wrath of God. Feel any better?

-Dik

 

[dik]

Many moons ago, I downloaded the Excel spreadsheets from the Reinforced Concrete Council in the UK; they were publically available at the time. There was about 35 or 40 of them. They are some of the nicest written Excel files I have seen. They have a load takedown program that also designs concrete columns (to BS Code, I assume; I think the sheets predate the EU). Another program I use a lot is the continuous beam by Yakov, also decades back... I've modified it slightly, with his permissiion.



Rather than think climate change and the corona virus as science, think of it as the wrath of God. Feel any better?

-Dik

 

[RFreund]

Wow, thank you so much RFreund. I may have to enlist you and dik as my personal SMath tutors when the time comes.

No problem, just let me know. Their forum is pretty good too. There is an "FEA BEAM" function that is pretty helpful. Like most other stuff, it's frustrating at first but then you learn how to work around some of the short comings.

 

[KootK]

There is an "FEA BEAM" function that is pretty helpful.

Cool!

 

[RFreund]

Yeah, that's the one.
That file is more educational/fun than anything. But you can take those functions and apply them to other stuff so you basically have a beam "engine" for any calculation that you want to create. To be honest, I've spent a great deal of time getting that to work (where I could send it loads a rather than having to place them graphically) and it is kind of a work-around-work-around that I don't use very often. But it is helpful for curtain wall / storefront stuff when you need to reinforce a mullion and you have different E-I values over only a portion of the beam. If you ever get into that, I can try to cut down the learning curve.

 

[Settingsun]

Can I jump in for a moment just to ask about your use of SMath and also who/ what is northwoods?

Just saw this floating across social media. RFreund, you're asking dangerous questions...

 

[dik]

thanks... only heard of one of the seven...

Rather than think climate change and the corona virus as science, think of it as the wrath of God. Feel any better?

-Dik

 

[dik]

Can you give me a bit of a hint? Thanks.

Rather than think climate change and the corona virus as science, think of it as the wrath of God. Feel any better?

-Dik

 

[RFreund]

Just saw this floating across social media. RFreund, you're asking dangerous questions...

Haha, nice. Solid coverup by dik and Kootk.

Can you give me a bit of a hint? Thanks.

Yes. I've attached a file where it 'works'. Unfortunately, it's not very "stable".
You will see that there are multiple "functions" at the top of the worksheet:
[ol 1]
[li]Templates for Beam Drawing[/li]
[li]Create Modeller Input[/li]
[li]Process Info for Input into Solver[/li]
[li]Beam Solver[/li]
[li]Beam Post Processor[/li]
[/ol]
It would be best to just send the loads to either "process info for input into solver" or "beam solver". However, I actually use the loads to create the graphical model and then it proceeds as if you were using the graphical model. Which I guess is kind of nice, because you can see the applied loads. Also you don't want to have any of the inputs be a "nothing matrix" That's why there are 0 loads in all of them.
This version is still considered "testing" I have a slightly different version for use in curtain wall stuff, but I need to dig that up, its linked to other stuff.

Lastly - Credit to Martin Kraska for his work on this.

https://files.engineering.com/getfi...5977c4&file=BeamFEA_-_RSF_-_V1_-_Testing-1.sm

 

[dik]

Thanks, I'll take a gander at it.

Rather than think climate change and the corona virus as science, think of it as the wrath of God. Feel any better?

-Dik

 

[Lomarandil]

Maybe this is a good time to bring up Celt's open source repository for sharing SMath resources.. not a lot there yet, but it sounds like there are a lot of potential tools floating around

https://github.com/open-struct-engineer/SMath_Studio/tree/master

----
just call me Lo.

 

[dik]

Hi Lo... thanks

Rather than think climate change and the corona virus as science, think of it as the wrath of God. Feel any better?

-Dik