Mechanical Definition and 1000 Threads

Mechanical engineering is an engineering branch that combines engineering physics and mathematics principles with materials science to design, analyze, manufacture, and maintain mechanical systems. It is one of the oldest and broadest of the engineering branches.Mechanical engineering combines creativity, knowledge and analytical tools to complete the difficult task of shaping an idea into reality.
The mechanical engineering field requires an understanding of core areas including mechanics, dynamics, thermodynamics, materials science, structural analysis, and electricity. In addition to these core principles, mechanical engineers use tools such as computer-aided design (CAD), computer-aided manufacturing (CAM), and product lifecycle management to design and analyze manufacturing plants, industrial equipment and machinery, heating and cooling systems, transport systems, aircraft, watercraft, robotics, medical devices, weapons, and others. It is the branch of engineering that involves the design, production, and operation of machinery.Mechanical engineering emerged as a field during the Industrial Revolution in Europe in the 18th century; however, its development can be traced back several thousand years around the world. In the 19th century, developments in physics led to the development of mechanical engineering science. The field has continually evolved to incorporate advancements; today mechanical engineers are pursuing developments in such areas as composites, mechatronics, and nanotechnology. It also overlaps with aerospace engineering, metallurgical engineering, civil engineering, electrical engineering, manufacturing engineering, chemical engineering, industrial engineering, and other engineering disciplines to varying amounts. Mechanical engineers may also work in the field of biomedical engineering, specifically with biomechanics, transport phenomena, biomechatronics, bionanotechnology, and modelling of biological systems.

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  1. W

    How does the energy from ATP get to converted to mechanical energy?

    OK, so ATP releases energy. At what point are things moving? How does this "energy" lead to a muscle fiber contracting?
  2. D

    Find the tensions of two strings in mechanical equilibrium

    I tried to do the free body diagram of the problem, but I{m confused because the rule is inclined. Should I just use the given angles to calculate the forces on x and y? Also, how should I calculate the torques? Since I don't know the dimensions of the rule. Can you help me? I think that once I...
  3. s4thishkmr

    How to manufacture this nozzle?

    Hi guys , Need help and suggestion in finding best way to manufacturing this nozzle. Thanks
  4. L

    Gears create more torque? Prove it

    Hi guys, I was sizing up a servo motor the other day and started thinking. While we all know gear ratios will effectively "convert" speed into torque. I couldn't help wondering about the initial starting conditions.. The problem below... Lets say I have a motor with a max load of 1Kg...
  5. T

    How does mechanical torque affect generator volts and amps?

    Hello! today I have a question regarding the most efficient way to generate electricity by moving a magnet across a coil. The theoretical magnet would be moving in a circular motion fixed to the outer circumference of a driver wheel like in many simple generators, how does the physical torque...
  6. C

    Mechanical loads on ITER's magnetic coils

    Is there a prediction/paper/etc. about the mechanical loads that will be reacted onto ITER's magnetic coils? The reason I ask is a simple calculation. My understanding of the numerical figures on ITER are that it is intended to contain; density ~10^20 temperature ~20keV I think that means a...
  7. S

    Torque required to rotate a hollow cylinder containing chips

    I am designing a prototype to remove cutting oil from waste metal chip during Gun Drilling. My prototype consists of a netted(meshed) metal cylinder rotating horizontally about its axis with help of shaft and a pressurised air blown from above. The metal chips will be put inside netted cylinder...
  8. fluidistic

    I Impact of superconductivity on mechanical properties?

    It is often said that the mechanical properties of metals are mostly due to their free electrons. I'm talking about malleability, ductility and hardness. So, when they suffer a superconductive transition, I expect a drastic change in their mechanical properties, but I haven't found anything on...
  9. E

    Engineering How proficient do i need to be in CAD for a mechanical engineering internship?

    How proficient in cad should someone who is applying for mechanical engineering internship be? I am teaching myself solidworks and i would like to have a benchmark to progress towards so when I began applying for a mechanical engineering internship in the near future i will feel prepared.
  10. B

    Calculate the change in mechanical energy during collision

    Homework Statement A 15 kg block is attached to a very light horizontal spring of force constant 5000.0 N/m and is resting on a frictionless table. It is struck by a 3.00 kg stone at 8.00 m/s to the right, then rebounds at 2.00 m/s to the left. Homework Equations ΔE = ΔK + ΔU The Attempt at...
  11. Justin71

    Torque Calculation for Screw Ball: TL Preload Nut

    Hi I don't understand what Fa mean ? This the weight or no ? And i don't understand too why in the torque TL, we have an additional part with the preload, the internal friction coeff of preload nut ... What is it ? Thanks.
  12. T

    Where can I find educational mechanical engineering devices?

    Does anyone know of a website that sells mechancial devices that demontrate the principles of mechanical engineering? Dynamics (gyros, etc.), Fluids, Deformation, Heat Transfer, etc? For undergraduates
  13. B

    Quantum mechanical integral equation problem

    Homework Statement The question is; for a qunatum mechanical particle, Ψ(x) = [1/(a1/2.π1/4)].[e-(x-xo)2/2a].[eip0x/h] in here, x0, p0 and h are constants, so, Homework Equations what are the <x>; expetation value, and <P>;expectation value of momentum ? The Attempt at a Solution , [/B]...
  14. B

    A Quantum mechanical integral equation problem

    The question is; for a qunatum mechanical particle, Ψ(x) = [1/(a1/2.π1/4)].[e-(x-xo)2/2a].[eip0x/h] in here, x0, p0 and h are constants, so, what are the <x> and <P> ?
  15. Roy S Ramirez

    How many O-rings would a mechanical engineer use here?

    Hello everybody! Happy 2019! I'm trying to design a mechanical face seal for the part shown below, and I'm struggling with the number of o-rings I'm supposed to use. There are two cavities (rings) for two different fluids. The liquid dynamic pressure for both the internal and external fluids is...
  16. lia256

    Mechanical Resonance Lab Questions

    Hey everyone. I have a lab with questions we have to answer but I don't really have any access to equipment. I still have to answer the questions to the best of my ability and any help will be appreciated! 1. Homework Statement A string is attached to two retort stands and two equal masses...
  17. P

    Calculating Mechanical Energy of a Launched Ball

    Hi Everyone, I can't seem to figure this problem out. Please help! 1. Homework Statement A ball was launched upwards and vertically at a speed 3 m/second up to a height 4m. Calculate the mechanical energy of the ball if its weight is 5 Newtons and has a mass 0.5kg . Homework Equations...
  18. J

    Meshing & connection issues for a beam/line solid

    I designed two geometries (one for beam/line reinforcements and other second for a solid block shown below) in Ansys workbench spaceclaim for static structural analysis. In Ansys workbench Mechanical, I got a weird mesh for the reinforcements which I modeled as beam in Spaceclaim (shown...
  19. S

    Coordinates from Ansys Mechanical to Ansys Fluent

    Dear all, I am implementing a fluid analysis on cerebral aneurysms and it is obligatory to apply the origin of my coordinate system at the inlet of the aneurysm.I use Ansys Mechanical for the meshing of my geometry which comes with a pre-applied Global coordinate system. I am able to create a...
  20. johnwabeck

    Looking to achieve opposing mechanical forces.

    Hi Everyone. New to the forum I am attempting to design a piece of furniture that has opposing forces. A set of opposing stairs that either lower or raise a central platform. The idea is that two people would have to collaborate together to make sure the central platform doesn't sink. Think...
  21. M

    Engineering Bachelor of Nuclear engineering, Masters in Mechanical?

    Hi, I am just about to finish my bachelor of nuclear engineering, my aim is to work in the industry " energy companies " ,I want to be a CFD engineer, where I can work in both the nuclear field and outside the nuclear field. Is a masters in mechanical engineering a good idea ? if yes, any...
  22. PlasMav

    Exploring Fusion Power and Nuclear Engineering: A Student's Journey at UTA

    Hello, I am a BSME senior with NE minor graduating in August 2019 from UTA. I am very interested in fusion power, space travel, and electrical engineering (lol). I almost wish I had picked EE instead of ME. It's more interesting to me. I just joined an EE student and together we are building a...
  23. M

    Mechanical engineering - Stress concentration

    1. In my materials science's exam, I had the following question: What would be the maximum force F to cause failure in a block that has been drilled at two place? See following drawing: (Lame paint skills, I know..) 2. Homework Equations 1) D/W 2) σ = F/S The Attempt at a Solution 1)First...
  24. sams

    Scleronomic or Rheonomic Mechanical System?

    I would really appreciate if someone could advise me whether the system below is a scleronomic or a rheonomic mechanical system, or a mix of both. If we consider the first pendulum, the constraint is fixed which leads to a scleronomous case while the constraint of the second pendulum is not...
  25. Ethan Klein

    Mechanical Engineering (BS) Vs. Pursuing Physics PhD

    Hello everyone. Currently, I am an undergraduate sophomore planning to study physics and in the process of transferring from community college to University. I am seeking advice on deciding between pursuing a mechanical engineering degree (BS) or a PhD in physics. My journey so far has taken...
  26. N

    A manometer measures mechanical or thermodynamic pressure?

    Hi guys, I have two questions as follows, ofcourse they may seem too basic, I have read through certain texts (engineering) but I still haven't been able to actually physically understand, so asked here 1) Whats thermodynamic pressure w.r.t physical point of view? - for a gas from...
  27. E

    Regulatory bodies for manned submersibles in Canada

    Hey guys, new member here! I am an undergrad engineering student and I am currently working on a project for a course that requires designing a ballast system for a manned submersible and I was wondering... Are there regulatory bodies in Canada that you know of that is responsible for...
  28. T

    What Should My Title Be for Amazon Mechanical Turk?

    Hi, I have a question. I just signed up for Amazon Mechanical Turk for passive income. My only problem is what would my title be?
  29. D

    Engineering PhD in Mechanical Engineering, CC teaching?

    I am almost finished the final drafts of my dissertation, and now I am wondering what to do next. It seems that all jobs at universities want someone to "establish a thriving research program" or the like. That's not me, so a job at a university is out. I very much want to teach, but much...
  30. S

    Pressurizing Argon Gas: Pump or Compressor Options?

    I need to pressurized argon gas from 1 bar pressure to 2 bar pressure. Flow rate outlet is 0.5 LPM. Can anybody suggest me a pump or compressor which is small in size? Minitiarised diaphragm seems good option but is it right one?
  31. D

    Programs Change of Major from Mechanical Engineering to Material Science

    Hello guys, I received an admit to grad school for Mechanical Engineering, where my focus was initially Thermo-Fluids . I've also enquired about the Material Science department at the University(in the USA), and they are willing to let me transfer to the Material Science department provided I...
  32. NewEnglander

    Compound lever: Best fulcrum location to increase mechanical advantage

    Good morning all, Ever since I encountered biomass brick presses I've had a renewed fascination with the use of compound levers to increase mechanical advantage. So my question is about the fulcrum location and its impact on MA. Let's say we have a simple class 1 lever A and we wish to...
  33. mark!

    B Was the Big Bang a quantum mechanical vacuum fluctuation?

    It has been proposed by Edward P. Tryon that the Universe may be a large scale quantum mechanical vacuum fluctuation where positive mass-energy is balanced by negative gravitational potential energy, as a consequence of the early inflationary launch of the expansion of the Universe, in which...
  34. V

    Engineering What jobs are available for mechanical engineering freshers?

    I am mechanical engineer fresher. I want to know what are job opportunities for fresher in mechanical engineer.
  35. J

    Mechanical energy for planet in elliptical orbit around star

    Homework Statement A planet is in an elliptical orbit around a star. Which of the following best represents the mechanical energy E_planet of just the planet and the mechanical energy Es_tar-planet of the star-planet system as functions of time for one complete orbit? Homework Equations...
  36. BMR

    Mechanical Advantage vs. Lever vs. Human Error

    This is my first post here, so pardon if forum guidelines/criteria require this to be designated elsewhere. I am designing a clamp mechanism utilizing lever mechanics, and I am getting conflicting info regarding Mechanical Advantage and the Law of 1st Class Levers. Regarding MA, knowing that...
  37. jybe

    Mechanical energy lost when child jumps onto merry-go-round

    Homework Statement I have a basic problem where a child jumps tangentially onto the outer edge of a stationary merry-go-round, and you have to use conservation of momentum to find the final angular speed of the merry-go-round. But the next part of the question asks "how much mechanical energy...
  38. S

    Stress and Thermal Creep in ANSYS Mechanical

    Just wish to know if there are GOOD EXAMPLES out there on the topics above. I am particularly looking for thermal creep using ANSYS Mechanical Workbench ... Thank you much.
  39. T

    Mechanical waves encountering a change in Density

    Suppose a ocean wave encountered a section of ocean which had a higher level of aeration from gas such as methane escaping from the seafloor. Due to the aerated sections apparent lower density would the wave travel slower through the aerated section than its propagation speed thru pure seawater ?
  40. Fia Ismi Nur Alfiah

    How to Determine Velocity and Acceleration from Position?

    Homework Statement [/B] The position of a particle as a function of time is given by r(t) = i(1 - e^-kt ) + je^kt where k is a positive constant. Find the velocity and acceleration of the particle. Sketch its trajectory. Homework Equations v (t) = dr/dt a(t) = dv/dt The Attempt at a Solution...
  41. C

    What is the Mechanical Advantage of this lever? (for pulling tree stumps)

    I am interested in building a lever system for pulling up small tree stumps. I have seen this demonstrated on youtube videos. For example... However, I am more interested in calculating the various forces and mechanical advantage for such a system so I can figure out the best lever length...
  42. B

    Horizontal propagated movement of mechanical wave

    Homework Statement A hand induces a transverse wave in a string by periodically moving up and down. This causes the string to move up and down. This movement propagates through the string producing a series of wavefronts which move towards the fixed wall with a velocity v. How do we...
  43. Emellish

    Elimination OF Abrupt Mechanical Shock Loading

    It's a problem of reducing an abrupt shock load as an 850 kg runaway machine trundles down ramps, and comes to an abrupt halt at the end of its tether fixed to a van's tow hitch. Ramps fixed to the van's rear door sill incline at 20 degrees to ground level and their length is 2.5 metres. I...
  44. C

    Small scale mechanical energy battery

    Hi there. I am a novice but I was wondering what you all think is the most applicable mechanical energy storage device for small scale off grid applications is. I just read the thread on pump storage and it seems like a good idea but I thought I would keep it broad. Thanks!
  45. Irl495

    What are the interests and research areas of this scientist?

    Nice to be "meet" you! I'm currently working towards a PhD in the area of energy systems/water splitting hydrogen production reactor design/empirical characterization in the mechanical and aerospace engineering department of my university. During my undergrad years I really enjoyed learning to...
  46. JTC

    Best way to learn control theory for mechanical engineers

    Hello, I have begun to teach myself Control Theory. I am looking for a book that is focused for mechanical engineers. I do not mind examples in electrical engineering, but they bore me (no offense). Also, I find some books begin with Laplace Transforms. Yet I found this online lecture...
  47. Lukeblackhill

    Mechanical Collision: Measuring Sound & Heat

    Morning! My question is this: If we consider a situation of mechanical collision, in the real world we shall observe certain loss of energy into heat or sound. Can we find mathematical equations to measure the amount of sound or heat produced using only mechanical variables, such as mass...
  48. Sarah Jones

    Civil Engineering or Mechanical Engineering for Aerospace?

    Hello, I am currently a senior in high school, I will be attending college in the fall of 2018 to pursue a career in Aerospace Engineering. I am a bit worried about a few things in this field. I am not sure if I need to get a degree in Civil Engineering or Mechanical Engineering, when I look on...
  49. Jay Macarus

    Tips for someone looking to study MechEngr

    Hello my name is Jay, I recently joined the forums to increase my exposure to physics while I begin a pathway into Mechanical Engineering. I'm currently in some basic courses that should give me a head start come my freshman year this fall, but I wanted to collect some tips/advice. Anything...
  50. D

    Question - Mechanical (two-piece carrier)

    <<<Moved from another forum. No template. >>> I have to solve this mechanical Problem... I solved it, but I get fpór By=0,448F (see at my calculation!) and the right answer is 0,3F...what did I wrong? I should solve A B C! B is a two-piece carrier. F and a is given!
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