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too bad you learn about none of this as undergrad.

pic related

freshman statics.

>>4380496

I beg to differ? I mean, the courses are at least 3rd or 4th year, but there are courses about machine elements and mechanism design in an ABET certified curriculum for MechEng.

>>4380496
I beg to differ as well. If you an ME and if you don't learn any of the stuff that is shown in this thread then you went to a shit school or didn't pay attention.

Stuff that's not in equilibrium?

vomit.jpg

Some good fap material right here. Aerospace/mechanical for life.

http://m.youtube.com/#/watch?desktop_uri=%2Fwatch%3Fv%3DCwVaYuIPJHY&v=CwVaYuIPJHY&gl=US

>>4380612
>>4380628
i wasn't talking about design courses, those are a joke. something along the lines of actually analyzing such machinery. the only course i can think of that's offered at my university is a course about internal combustion engines. everything else is mechatronics or robotics.

>>4380823
i always disliked this gif because it does a terrible job of showing how the bolt works, and instead focuses largely on the gas system which is piss simple.

>>4380850
have you found a better one?

>>4380856
no, it's extremely difficult to find any images, especially animated gifs, showing how bolts in any firearm work.

tis a shame because bolts in semi-auto firearms typically are locked at the chamber until the gas system "unlocks" them.

Computer Engineer here. I have a question for any mechanical engineers/mechanical engineering students around.

For you guys, is building/machining stuff a critical part of your design process? Or do you just do CAD most of the time and let some unionized dude build it?

that's all I have

>>4380480
Can anyone post a hydraulic actuator and power unit? (like, for a double acting valve or something)

>>4380931
thanks, was interesting

This thread is fucking porn.

thread archived:
http://chanarchive.org/4chan/sci
vote it up to make it permanent

What do engineers use for contraception? Rancid B.O. lolololol

U mad?

very nice collection, thank you for sharing.

>>4380956
Why? It's all ready right here: http://archive.installgentoo.net/sci/thread/4380480

>>4380694
>>4380693
>>4380698
>>4380702
>>4380852
>>4380870
>>4380871
>>4380874
>>4380885

I have the weirdest boner right now.

Is this porn for Mechs? I am aroused...commence computer hump

>>4381002
I actually didn't find it that interesting (as a mechancial engineer), but I'm in a very different sub-discipline.

>>4380901
>For you guys, is building/machining stuff a critical part of your design process? Or do you just do CAD most of the time and let some unionized dude build it?

Mechanical engineering covers an enormous spectrum, basically anything with moving parts. Because of that, there are some guys that are really hands on and involved with machining/fabricating, but it's really more of a niche thing. Mech engineers do have to at least know the basics of how shit it made though, so we don't go off and design something that's nearly impossible to build in the real world, or goes way over budget.

>>4381014
Eh, it doesn't always have moving parts even. If you look at, say, aerodynamics there are plenty of unsteady, unstable problems that are interesting and novel which involve no moving parts. Bluff-body aerodynamics is a great example.

http://www.google.com/patents?id=ETJjAAAAEBAJ

This is the single most beautifully written patent I have ever read. I wish to one day achieve this level of greatness.

>>4380901
Well, 'how is this going to be made?' is a constant question in the back of your head, and for some people its a very easy thing to for. I took four years of welding in high school, so I built up a bit of an intuition for it, but for a lot of people it's not so easy. A big part of good design, in that regard, is constantly keeping some fabricators in some point of the design iteration (as it is, of course, an iterative process). Take a drawing to a machinist and ask, "hey, would this be too difficult to build? what do you think? what would you change?". At the end of the day, you're the engineer and you have to ignore some of their suggestions, but they'll often have good insight.

Also, make good use of weldments.

This is the greatest thread to have ever graced this board with its presence. However, I have yet to see many fluid mechanics images posted. Let's have some of those shall we?

>>4381036
thats supposed to be 'to design for'

>>4380901

As far as physically realizing the design, that's usually not your problem. Making sure it's possible to make and optimizing it for fabrication/assembly? That's our problem. At my previous job, I did a hell of a lot of GD&T (geometric dimensioning and tolerancing). I did a LOT of CAD, but I would occasionally talk to the shop guys because they know their shit (since their job is to make/assemble said shit).

>>4381020

Oh, I'm well aware. I'm doing a double major in mechanical and aerospace engineering. I've just always considered aerodynamics, fluid mechanics, gas dynamics, etc to be more aero than mech. Fluid mechanics is my personal favorite sub field, but the impression I get from mech students that take it is that they hate it and would rather be taking a machine design or solid mechanics class.

>>4381037
Animated

>>4381047

>>4381056

Schlieren Imaging.

>>4381046
I'm an M.Sc. student in mechanical engineering and my research is (exclusively) in low-Reynolds unsteady aerodynamics. My B.Sc., also in mech, I specialized in gas dynamics.

'Aerospace' in my mind, as a sub-discipline of mech, has always been more in-line with the tradition of aeronautical engineering. With fluid mechanics being its own sub-discipline.

>>4381061

This is a random Google image of Particle Image Velocimetry (PIV). I do research under one of my professors who specializes in optical techniques for fluids research and we use this fairly often.

>>4381068
3D PTV setups are much more interesting, if only for the fact that you can't buy one off-the-shelf.

>>4381068
>>4381070
Doppler PIV, tomographic PIV, and other 3D PIV techniques also seem highly inelegant.

>>4381047

This phenomenon is actually used in some flow meters based on the Strouhal number. The frequency of vortex shedding given the geometry and Strouhal number can determine the flow rate!

>>4381074
right, so you've read the definition of the Strouhal number

>>4381077

Well I actually learned about it in my flow instrumentation class.

>>4381068

Afterburner.
HNNNNNG

>>4381083

This is the single most fap-worthy Youtube channel I have ever found:

http://www.youtube.com/user/AgentJayZ/videos

>>4381083
Shock diamonds are pretty cool

>>4381092

Amen to that sir.

I approve of this thread. It's a shame that I'm browsing on someone else's ill equipped laptop. Boo laptops

>>4381089
CANADA STRONG

Robotic Canfield joint.


http://www.youtube.com/watch?v=DaWYCAt-kgE - Niiice

Fluid dynamics=>Naval Architecture/Marine Engineering. Get out of my field mechanical engineers.

>>4381289

It's called naval architecture because can barely be called engineering.

Fluid dynamics are for the aerospace/mechanical master race.

Its like im in old /sci/ again

>>4381047

Hnng. I'm an Aerospace Engineering post-grad-grad. Love that stuff.

Friction stir welding

Welding a steel pipe, this machine is badass.
http://www.youtube.com/watch?v=niVsJPFlg1Y

Fatass robot arm demonstration
http://www.youtube.com/watch?v=0sRJqjWIMAc

http://www.youtube.com/user/e1m1s

Cool stuff about good old metal machining and general manufacturing.

>>4380901 For you guys, is building/machining stuff a critical part of your design process? Or do you just do CAD most of the time and let some unionized dude build it?

All depends on your focus, running the machines and fabricating are high skill trades that require their own training and experience but if you wanted a job in a workshop you could get it. You can't design a part without considering what manufacturing process will be used. Many different engineers in many different departments with varying degrees of cooperation with the production operatives. Some may give a general sketch and partfile with dimensions and requirements to the CNC guy who will create the program and make whatever modifications for the most efficient working of his machine. Others could have to do the entire sketching, part modeling, programming and machining themselves. All depends on the company, smaller companies with less staff might expect the one person to do a variety of tasks.


7 robotic arms working simultaneously on one part.
http://www.youtube.com/watch?v=QU8LuxaqOfI&feature=related

>>4380534
That's pretty cool, actuallt

>>4380693
I have the weirdest boner...

>>4381443
>>4381443

Nice channel!

>>4381469

Struggling to think of its use. Specific measured pulses of a pressurised gas?

>>4381480
Or just a gas powered replacement for a combustion engine. Probably nowhere near efficient enough though.

>>4381491
>mfw combustion engines are gas powered
>mfw the gas in that gif isn't the driver

>>4381511
combustion engines are combustion powered, gas is just the usual fuel for that combustion. You can have liquid combustion engines (heard of petroleum?)

>>4381517
>implying liquid burns

sounds like you don't know shit about ICE.

>>4381517

Ever heard of vapour?

You're thinking of a pneumatic motor which isn't a piston and crank. The above gif has a driven crank which lets a finite volume of pressurised gas pass through it.

>>4381511
>mfw the gas in that gif isn't the driver

http://www.animatedengines.com/co2.html

>>4381538
Actually I'm talking bollocks, the gas + flywheel does drive the crank. Duhh. Still could be used for measures of gas.

http://www.animatedengines.com/co2.html

Does anyone happen to have any great gifs of either eddy currents or more specifically eddy current absopption dynamometers? Was trying to make one in powerpoint, its not conducive to that sort of stuff and learning the abilities required to use flash is not viable in three days

cool stuff.

>>4380986
I didn't know about that archive.
I've only ever seen >>4380956

I did CFD flow of turbomachinery for my uni project. I'm never doing that again...

>>4380986
I thought that site only archives thumbnails and not the full image. At least that's what the faq says; once the thread is gone from 4chan, the full image is gone.
Chanarchive saves the whole image.

>>4381702
Whyyy?

T_{ij} = \frac{1}{2}(T_{ij} + T{ji}) + \frac{1}{2}(T_{ij} - T_{ji}) \equiv \frac{1}{2}(T_{ij} + T_{ji}) + S_{ij}

>>4381702
>>4381538
>>4381443
>>4381400

What stuff/basic machinery can a guy with no uni education conceivably build using purchasable parts?
Always wanted to create something myself

>>4381725
what are you retarded?

>>4381787

I've had plans to build a can crusher but haven't had the time to bother. A simple lever and sliding mechanism for flattening beer tins or crushing bottles.

Something with levers, gears or pulleys is always satisfying even if it's largely useless.

>>4381787

I once built a working engine differential out of a wind-up car and some spare Lego parts, and this was before i started studying mechanical engineering.

Building mechanisms isn't that hard: if you can get standardized parts (Lego Technics or any other similar product) and look at the diagrams/explanations in the Wikipedia pages, it can be built without any advanced education in the matter. However, don't expect to build jet engines.

pic related, what i built.

>>4381792
what, can you not read?

http://archive.installgentoo.net/faq.html
"Only thumbnails are archived. Full images aren't. Once the thread is gone from 4chan, the full image is gone."

Proof:
Choose any thread in that archive and click on a pic. It links directly to the image on 4chan.
Choose a thread in that archive that is already gone from 4chan (about page 10 in the /sci/ archive there), and the image is gone too. The only thing that remains is the thumbnail in that archive.

Not so with Chanarchive. It archives the full image.

http://www.mediafire.com/?hot1n5f34f4kqdr

Uploaded a bunch of fluid dynamics books again.

11 books 120mb

>>4382938

Will make some more packages of engineering books and share them later

>>4382938

thank you!

>>4382938

I love you with every fiber of my being.

Whats the career outlook in this field? I am just starting college and want to do mechanical engineering but I have heard its full of more qualified graduates then it has jobs available. If you get a degree in mechanical are you going to be waiting years to get a job in the field?

>>4384461 If you get a degree in mechanical are you going to be waiting years to get a job in the field?

Absolutely not. The longest I've heard someone was waiting was about 4 months. Can depend on the area you live but there are tons of opportunities if you're willing to relocate. It's a very mobile degree.

>>4382938
Can I give you a blowjob?

>>4384461

Mechanical engineering is the most versatile field of engineering, so naturally you'll be able to get a job relatively easily regardless of how bad the economy is (assuming you don't have a shit GPA and that you don't mind relocating). It's the surest bet out of all majors in terms of job offerings.

What most people tell you is that some of those jobs you may not necessarily want: not everyone can build components for NASA rockets, and a lot of available jobs in the field can be mind-numbingly boring. However, the pay will generally always be good.

http://www.mediafire.com/?7aqensgr69zhiq7

Engineering Mechanics Dynamics
Engineering Mechanics Statics

+ Engineering Mathematics II just because it fit

>>4384742

Coming soon

Springer Handbook of Mechanical Engineering
Springer Handbook of Nuclear Engineering

These are nice, very big, books. 1500+ and 3000+ pages respectively.

>>4384753

http://www.mediafire.com/?c3zu1rwvd8f2gkq

107mb

There's a silly number of topics covered in these books. Great for a quick insight.

>>4380731
time to go get myself some technical degrees and certifications then.

>>4380892
>>4380894
>>4380897
>>4380899
>>4380900
AT FUCKING LAST
MOM'S SEWING MACHINE IS NO LONGER A MYSTERY!

>>4384753
>>4384742
>>4382938
Thank you, thank you, and thank you. Your time and books are VERY appreciated.

>>4380731 something along the lines of actually analyzing such machinery. the only course i can think of that's offered at my university is a course about internal combustion engines. everything else is mechatronics or robotics.

It's kind of a waste of time to analyse individual machinery in any great depth. You learn about components that are used in a variety of machines and with this information you can infer how and why each machine is using it.

There's no point being an expert in something that someone has already invented because it limits you. ICE and Mechatronics are different because they're specialised but they're also very widely used in many forms by many different companies. If you had a course dedicated to the study of sewing machines the only company to benefit from this is a big sewing machine manufacturer and you don't have much choice other than to work for them.

>>4384819

You're welcome. I'll upload some more later.

Vibrations pack on its way.

Just realised I have next to fuck all on pneumatic and hydraulic circuits or other process controls

>>4386878

Picture related

http://www.mediafire.com/?66jzti6f2ik6dps

>>4384742
this is a good book. It is worth torrenting the solutions manual as well, since the working is laid out nicely.

>>4380901 unionized dude

I read this as 'un-ionised'. I had to wat for a minute..

>>4384687
What is defined as a shit GPA?

>>4388035
>What is defined as a shit GPA?

I don't know. My father said I need to get all A's.

>>4388035

It honestly depends on your university and your education year. Usually, engineers have to deal with humongous drops in grade value, which don't occur that much in non-STEM majors. To exemplify what i mean:

>Have 3.00 GPA or a bit higher
You're doing swell: you have a nice shot at getting an intership somewhere during your education process, and you can get a good job with good starting pay, though it may be a bit boring or tedious.

>Have anything less than 3.00 GPA
You are so incredibly fucked. Most interships won't even consider you, and your job prospects suddenly drop down to zilch. Of course, there will be jobs, but prepare for utterly boring bureocratic stuff with decent pay at best.

Of course, this doesn't hold always, but it's a good summary.

>>4384742 It is worth torrenting the solutions manual as well, since the working is laid out nicely.


Got the solutions for statics and dynamics >>4387064
http://www.mediafire.com/?x265q3hekt60wdw
Password is sci

Bumping with a digger

>>4389279
Fuck yeah, hydraulics.

Dat cantilever

This giant excavator thing was built for the Canadian oil sands. It often required maintenance which would mean the entire line had to shut down equating to a lot of lost production time. It turned out that an army of smaller (still huge 300t per bucket) vehicles were more efficient with a much less disruption in the flow of material.

Each tooth is 90kg of steel new and can lose 26kg of material per shift. Replaced every ~12 hours.

>>4392154
Forgot the video link
http://www.youtube.com/watch?v=Z4lxpZUw3bw

Megastructures Ultimate Oil Sands Mine