Mechancal engineering Definition and 121 Threads

Hi all, I think this is the right place to post this?! Material sciences.. Nonetheless, I am searching for a strong inflexible plastic, that is transparent. The principle job of the plastic is to be a long piece with a sensor attaching at the end. The sensor will weigh about 2kg, putting a...

Hey, I’m kinda of in a crisis in my head here. I’m in the US to pursue my masters in mechanical engineering. After the introductory material science course, I believe I’ve got a greater interest towards materials than mechanical engineering. Would transferring to Material Science be a good...

Homework Statement In a frictionless piston-cylinder system, there are 3 kg of R-134a initially at 280 kPa and 15 °C. Heat is transferred to the system in the amount 120 kJ. What will the final temperature of the refrigerant be (deg C)? Homework Equations Q - W = ΔU (internal energy) Q - Wb...

Hello, I want to develop a pressure regulator model in simscape. The model will be the springloaded direct acting system and the aim is to target outlet pressure, temperature and flow rate by giving input parameters as pressure, temperature, spring stiffness, length and preload, lever(it is...

So I am a high school freshman student this school year. We have this career guidance presentation every once in a while by our counselors. I wanted to be an engineer but I realized something. I don’t know which engineer I’d want to pursue. I’ve limited it down to two. Mechatronics or...

Hi, I am new here. I am currently studying for my HNC in mechanical engineering :)

It's been ages since I have done Moments of Inertia of complex objects! :( Can anyone help?? Say you have an assembly like an airplane and you want to just get the moment of inertia(MOI) of the tail section and you are given the Mass of whole plane,mass of tail section, moment of inertia of...

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...

Homework Statement Homework Equations Singularity equations for beam deflection $$\sum M_B=0=-M_0-R_AL-M_0$$ $$R_A=-\frac{2M_0}{L}$$ The Attempt at a Solution I know how to use singularity equations and all that but my problem is calculating the force especially when moment is involved. For...

Hi, now I'm working on a project which involves a dc motor and high voltage. I'm developing a machine consists of a motor to rotate a platform disc and high voltage will be applied during the rotation. The problem is when I supply a positive high voltage at motor shaft during rotation, the motor...

I am a senior in college, working on getting my bachelors degree in Mechanical Engineering. I am currently taking an upper division writing class about writing in engineering, and am required to interview someone either presently working or has worked in the field, about writing in engineering...

Can somebody explain how to calculate brake power in IC engines ?

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

<<moved from a technical forum, no template>> Need a Solution ASAP!

Homework Statement [/B] Homework Equations - The pressure drop equation. [/B]The Attempt at a Solution

Homework Statement a) A mass of 0.12 kg of air has an initial temperature of 500°C and pressure 0.8 MPa. If the air is expanded according to the law pV1.2 = c to a final volume of 90 litres, determine i) its initial volume, ii) its final pressure, iii) its final temperature...

I'm trying to figure out whether it is best to use a multi-wheel or track system to get an object over a step, however I'm having a bit of trouble finding the torque needed for a track to pull itself up and over. Diagram of course is not to scale, but I've drawn up something of the situation...

Hi, First, let me tell you about myself: 1.) I have a Bachelors degree in Engineering Physics with a mechanical focus. 2.) I have been working as a mechanical engineer for 3 years at 3 different places. 3.) My work mostly consists of product design, detailed drawings and working in a machine...

u'(1-epsilon(u')^2)=-y uo(1)=0 u1(1)=0 I need solve this problem with mathematica.

A turbine operates under steady-flow conditions. It receives steam at a pressure of 15 bar, specific volume of 0.1318 m³/kg, velocity of 30 m/s and specific internal energy of 2594.5 kJ/kg. The steam leaves the turbine at a pressure of 30 kPa, velocity of 90 m/s, specific volume of 4.25 m³/kg...

I am currently about half done with my degree for a bs in Mechanical engineering from U of M. I transferred from a community college and I took all of my gen eds there like the English, history, econ, philosophy. I am in my second semester and am struggling with the physics and math mainly. I...

Homework Statement [/B] A fuel gas consists of 75% butane (C4H10), 10% propane (C3H8) and 15% butene (C4H8) by volume. It is to be fed to the combustion chamber in 10% excess air at 25°C, where it is completely burnt to carbon dioxide and water. The flue gases produced are to be used to...

I am about to register for my final year of school and I have 21 more credits to go. Time wise, they all work together, but I was wondering if everyone thinks that 21 credits is a lot? I have never taken so many credit before in one semester. I could push graduation back one more semester but...

Homework Statement Rigid body (ship) rotate and moves around 3 axis (x,y,z) around the center of gravity. The position is of the center of gravity is not known. What is known: At a point (A) the accereleration, velocity and position and rotational acceleration, velocity and position are known...

SO, here is the case guys. I have a mechanism to turn plate by a motor. Both motor and plate was connected through 2 spur gears. But here is the problem, when wind strike the plate, the plate start to rotate even without the power of the motor. What is the best way so i can prevent the plate...

For a long time I wanted to get degrees in both mechanical and electrical engineering and I recently heard about double majors. For me it's not as much about jobs I want in the future. I wanted to become an engineer because they are problem solvers. I wanted to invent things and or make them...

Emphasis in Computational Mechanics I possesses knowledge of mathematical bases of models such as FEM, BEM and FDM. For which I have modeled the contact of two vertebrae solving FEM by implementation using Matlab and Python. Implementation for computational acquisition of normal modes of mass...

Hello everyone! This is my first post here so please excuse me if I don't have the format right yet. Background: I'm a Mechanical Engineering student working on a robotics team and I'm tasked with designing the wheels. The robot is currently using 5 in radius wheels with old motors. The...

Long drive shaft of 5 inches fits into the end fitting and is rigidly attached by the bolts. Input torque is equal to output torque as we are ignoring losses from bearing. Let's assume that the load on the shaft is equal to 3*weight. (3 g's) (looking for more conceptual understanding rather...

I've been having some trouble with this problem for a while. (Its not a homework or coursework problem) Its a part of an experimental set up that I'm building and this is a simplified version of it. I have a rigid rod which is hinged at a point and can pitch or heave about that location. There...

I'm starting my engineering program (mechanical engineering) this fall 2017. Transfer student, going in as a Junior. That being said I'm looking to buy a new laptop to get me through the prorgan. I currently have a MacBook Pro 2010, no longer good. I'm not familiar with the Microsoft PC world...

My Name is Brendon Baker and I am a Senior ME student.

Assuming we have a cylinder that is rotating on a single axis, how would I go about calculating the torque knowing the following information? m = 2000 kg w = 60 rpm r = 5 m

Can there be a system that utilizes mechanical energy to produce kinetic energy, but "storing" the mechanical energy to be used at a different time for kinetic energy? Like a bike where you pedal but don't move; that mechanical energy is waiting to be "released" by some mechanism *** exclude...

Homework Statement Homework EquationsThe Attempt at a Solution I feel I did something wrong, but not sure where is my problem. I don't feel conformable on number 26 and 27 and 29, can someone please tell me which answer is incorrect and any tip on solving it would be greatly appreciated!

Hi all, I'm an undergrad Physics and Mech. Engineering major (possible astrophysics as well). This past semester I've been dealing with some personal issues and I ended up with sub par grades as a result. I now officially have a C and a C+ on my transcript (along with a few B/B+). I'm a rising...

I have a pump running at 400rpm with 8" inlet and outlet with head 30 ft 500 gpm. Now I am planning to reduce the discharge line to 6" . Assuming the flow rate and speed constant the velocity in the pipe will increase. How do I calculate the change in head?

Hiya, I'm been calculating stress and deflection in rectangle steel plate, I've been using two methods to see if I get the same results but i get different results. I want to confirm the methods I'm using and if I'm using them correctly. I have attached photos of my calculations, any...

Hello everyone, I need the following but I am not sure if it is possible or not? I don’t have mechanical engineering background. Please advise me on feasibility of this project and any suggestion would be greatly appreciated. I am looking to design a horizontal cylindrical hollow turbine...

Here is an illustration of something that came into my head: http://imgur.com/a/V9V8S (also attached to question) If we do a energy balance (in terms of head) between point 1 and point 2 (ignoring friction for now, it's not really important): $$\frac{P_1}{\rho g} + \frac{v^2_1}{2g} + z_1 +...

Hello everyone, I am in my first year at University, and I have to choose what discipline to enter. I am passionate about designing, testing, and implementing various ways to solve problems, and I found I can do this in both disciplines just in different ways. From previous job experience, I...

Homework Statement I am designing a fixture to hold a large piece of sheet metal on which a track robot will be tested vertically. Below is a sketch (the sheet metal on which the track and robot will be mounted will be attached to the vertical aluminum extrusions in the back) The weight of the...

Homework Statement Homework Equations Equation of Equilibrium (Horizontal and Vertical Forces, Moments) Normal Stress = F/A The Attempt at a Solution I have already solved the solution for this problem. For part (a), I simply found the force in the link, and used the cross area where the...

How much force is required to turn the front wheel of a 4 wheel robot that weighs 200lb. Assume the wheel is 6inches wide, has a diameter of 12 inches (rubber). I would like to know how much force is required to turn a single wheel left or right when it is in stationary (non-moving) position...

The block 1 of m1 sheets of mass on an inclined plane without friction at an angle θ to the horizontal. One end of a non-extendable rope with no mass is attached to lock 1. The chain is wound around a non-frictionally mobile pulley P of negligible mass and is also connected to the wall at the...

Hello guys, I am a 2 year B.E student in mechanical engineering. I like solving mechanics of materials, math parts veru well( excerpt numerical methods). Reading and YouTube ate my favourite hobbies. Nice to meet you

Homework Statement Please see attached file for problem statement Homework Equations ΣM = Min - Mout = 0 The Attempt at a Solution I have tried using the equation of conservation of momentum on this problem but I'm getting stuck at how the viscous force of the liquid is playing a role in this...

Hi Everybody, I have often found myself reading through the discussions on these forums but never ended up taking part. I came here today because I desperately need career path/education advise. Many of the people who regularly post on these forums appear to be very knowledgeable so I can't...

I'm doing some spring endurance test. If the spring is exceeding its cycles limit and causes fatigue failure, how normally the spring constant changes? For example, after the expected limit cycles (lets say 2million load-unload cycles), will the spring constant gradually decreases? or...

Hey everyone I'd be really grateful if anyone could help me out here, been going round in circles for two weeks now and I need to get going soon. Jumping right to the point, here's my problem: We are currently working on a student project and designing a Wind Turbine for future opensource use...