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Mechanical engineers often create simulations of the operation of objects, as well as the manufacturing processes to be used, in order to optimize performance, cost effectiveness, and energy efficiencies, before settling on a particular design.
Engineering drawings of the objects to be fabricated are the end product for a design engineer. They serve a dual purpose; to contain all information required for fabrication, and as a control mechanism for revision levels. Prior to the late 20th Century most engineering drawings were drawn by hand with the aid of mechanical drafting board s. The advent of the digital computer with graphical user interface made the creation of models and drawings using computer-aided design (CAD) programs possible.Most CAD programs now permit creation of three-dimensional models which may be viewed from any angle. State-of-the-art solid modelling CAD programs are a virtual reality for machine design. Such solid models may be used as the basis for finite element analysis (FEA) and / or computational fluid dynamicsFor " Contract For Difference," the financial derivative, see CFDs. For the Wikipedia categories for deletion administrative page, see an administrative page on the English Wikipedia. Fluid dynamics Computational fluid dynamics is the use of computers to (CFD) of the design. Through the application of computer-aided manufacturingIntegrating computer-aided manufacturing (CAM) with computer-aided design systems produces quicker and more efficient manufacturing processes. This methodology is applied in different manufacturing areas. Things taken care of by CAM: Verification of the d (CAM), the models may also be used directly by software to create "instructions" for the manufacture of objects represented by the models, through computer numerically-controlledThe acronym CNC stands for C omputer(ized) N umerical(ly) C ontrol(led and refers specifically to the computer control of machine tools for the purpose of (repeatedly) manufacturing complex parts in metal as well as other materials, using a program writte (CNC) machining or other automated processes, without the need for intermediate drawings.
Fundamental subjects of mechanical engineering include: dynamicsIn mathematics and physics, dynamics is the branch of mechanics that is concerned with the effects of forces on the motion of objects. Elementary principles Variational principles and Lagrange's equations Two-body central force problem Rigid body kinemati, statics, strength of materialsStrength of materials is the scientific area of applied mechanics for the study of the strength of engineering materials and their mechanical behaviour in general (such as stress, deformation, strain and stress-strain relations). Strength is considered in, heat transferHeat transfer or heat flow is the process whereby heat flows from regions of higher to regions of lower temperature. The flow of heat from one region to another is called a heat current. The rate of heat flow depends on the mode of heat transfer and on th, fluid dynamicsFluid dynamics is the study of fluids ( liquids and gases) in motion, and the effect of the fluid motion on fluid boundaries, such as solid containers or other fluids. Fluid dynamics is a branch of fluid mechanics, and has a number of subdisciplines, incl, solid mechanicsSolid mechanics (also known as the Theory of elasticity is a branch of physics, which governs the response of solid material to applied stress (e. external forces). It is part of a broader study known as continuum mechanics. There are several standard mod, control theory, pneumatics, hydraulics, mechatronics, kinematics, and applied thermodynamics. Mechanical engineers are also expected to understand and be able to apply concepts from the chemistry and electrical engineering fields. At the smallest scales, mechanical engineering becomes molecular engineering - one speculative goal of which is to create a molecular assembler to build molecules and materials via mechanosynthesis. For now this goal remains within exploratory engineering, and some consider it science fiction.
Related disciplines include; electrical engineering, industrial engineering, systems engineering, civil engineering, nuclear engineering, aerospace engineering, and other engineering disciplines.