What is Mechanical principles: Definition and 22 Discussions

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. S

    3D Volumetric Strain and Volume Change

    Summary:: Can anyone help me with this 3d Volumetric Strain and Volume Change. The is question is attached as a document below with the question and my attempt at the answer All questions and attempted answers are in the attached file below
  2. L

    How hard is the maths for Mechanical Principles and Thermo in ME studies?

    i going to do the online HNC mechanical engineering. its has 2 units mechanical principles and thermo. i was wonder how hard is it to learn those units and the maths online or with online tutor. i can do the maths if its inperson in class but learn on line I am not sure.
  3. M

    Mechanical Principles Dynamics of Rotating Systems

    1. For the mechanism shown in FIGURE 1 determine for the angle θ = 45°: (i) the velocity of the piston relative to the fixed point O (VBO) (ii) the angular velocity of AB about point A (i.e. ωAB) (iii) the acceleration of point B relative to A (aBA). (b) Determine the value of the angle θ...
  4. pHartless

    How Much Weight Can a 45-Degree Square Steel Tube Structure Support?

    I have a problem to do with my project in college. I'm creating a hanging fire pit, basically made of 3 lengths of square steel bar connected to a plate at the top and on hinges. The 3 legs of the frame move in slots and when in the open position would be at 45 degrees. The actual fire pit is...
  5. Al_Pa_Cone

    Mechanical Principles -- Assignment question

    Can anyone help me? I have a question with 3 part answers on my Mechanical Principles assignment. I believe I have answered question part 'a' and 'b' but I have been stuck on question part 'c' for days! So the question is: Q5. The simply supported beam shown in FIG 4 is 5meters long with a...
  6. C

    Mechanical Principles Factor of Safety Help?

    Hi, I'm currently puzzled on a question as I don't have/know the equation required to find the answer. The question is as follows:- Several sections of the structure are to be held together using bolts, determine the suitability of the proposed material given the following: The material for the...
  7. M

    Mechanical principles rotating systems

    Homework Statement A shaft 2 m long rotates at 1500 revs min–1 between bearings as shown in FIGURE 2. The bearings experience forces of 5 kN and 3 kN acting in the same plane as shown. A single mass is to be used to balance the shaft, so that the reactions are zero. The mass is to be placed at...
  8. D

    How Do I Solve These Mechanical Principles Problems in Electronic Engineering?

    hey, so I'm currently studying electronic engineering on year 2 of level 3 and having to study mechanical principles this year which I don't really know anything about and my tutor doesn't explain properly. I would appreciate some help on the method of calculating the questions. I've added clear...
  9. L

    Mechanical Principles - Rotating Systems

    A load of mass 250kg is required to be lifted by a means of a winding drum and cable. The mass will be initially at rest, accelerated uniformly upwards for 4 seconds and then decelerated uniformly for one second. such that a final height of 10.5 metres is gained. The winding drum has a mass...
  10. R

    Mechanical Principles - Dynamics.

    I hope I am posting in the right place. I am a 1st year University student. Although I am undertaking a BSc in Computer and Electronic System Engineering I have a Mechanical Principles module which I am finding a little bit of a struggle. Mechanical Principles - Dynamics: a) A diaphragm type...
  11. V

    Mechanical principles - Stess and modulus of elasticity

    Mechanical principles - Stress and modulus of elasticity Homework Statement A 2.2m long steel towing bar of solid circular section diameter of 45mm is expected to carry a maximum load of 210 kN. The safety factor is 4; and for the steel the UTS is 540 MNm-2 and the modulus of elasticity is...
  12. A

    How Do You Calculate Water Velocity and Pipe Diameter in Mechanical Engineering?

    Mechanical principles engineering question help?? Homework Statement A boiler is supplied with water at a rate of 0.5 kg/s through a pipe of diameter 80mm a) Calculate the velocity of the water in the pipe b) Calculate the smaller internal diameter of this tapered section of pipe...
  13. S

    Mechanical principles assistance.

    Homework Statement Hello this is my first post. Im currently studying towards a level three national diploma in engineering operations. I need some assistance with a mechanical principles problem. ( A crude drawing of the problem has been attached haha) I need to work out the direct and...
  14. J

    I with my mechanical principles home work.

    A drop hammer of mass 200kg falls freely through a distance of 2m to strike a forging and is brought to rest after a distance of 50 mm. The hammer does not rebound after impact. The mass of the forging is 500 kg. Determine the average resistance of the metal. please can anyone solve this...
  15. G

    Mechanical principles using D'lamberts

    First time doing this and i dnt really know how to begin. Homework Statement A pile-driver hammer of mass 150kg falls freely through a distance of 5m to strike a pile of mass 400kg and drives it 75mm into the ground. The hammer does not rebound when driving the pile. Determine the average...
  16. R

    Mechanical Principles, question on linear expansion of aluminium.

    Homework Statement Question: If the linear expansivity of aluminium is 24 x 10-6 K-1, how much does the aluminium expand during the heating? Homework Equations As far as additional information on the question goes; An aluminium rod is heated from 15 degrees Celsius to 120 degrees Celsius. The...
  17. C

    Mechanical Principles help please.

    1. The top pulleys of a Weston differential pulley block have diameters of 210mm and 190mm. Determine the effort required to raise a load of 150kg if the efficency of the system is 35%. What is the work done in overcoming friction when the load is raised through a height of 2.5m? I...
  18. T

    Calculating Dimensional Change in 2-D Loading System with Mechanical Principles

    Hey guys I am a first timer here. I need some help with a couple of questions I am quite stumped. 1. A bar in a 2-D loading system is 1 metre long and 20 millimeters square in section before loading. Determine the change in its "x" and "y" dimensions if E=200GPa and Poisson's Ratio is 0.3...
  19. K

    Mechanical Principles. Engineering Components

    Hi i am need of some help with a Mechanical Principle question. The Question The maximum load in a tensile test on a mild steel specimen is 94kN. If the test piece is 12mm diameter calculate the ultimate tensile stress. (u.t.s) What is the working stress and greatest allowable load on a...