### 69 terms that are used in mechanical engineering

Here are 69 terms with definitions used in mechanical engineering:

**Mechanical Engineering**: A discipline of engineering that involves the design, analysis, and manufacturing of mechanical systems.**Thermodynamics**: The study of energy and its transformations within systems, including heat transfer and work.**Kinematics**: The study of motion without considering its causes, focusing on variables such as position, velocity, and acceleration.**Statics**: The branch of mechanics that deals with the equilibrium of stationary bodies under the action of forces.**Dynamics**: The branch of mechanics that deals with the motion of bodies under the action of forces.**Force**: A push or pull acting upon an object, typically causing a change in its motion.**Torque**: The rotational equivalent of force, causes an object to rotate about an axis.**Stress**: The force per unit area acting on a material, often causing deformation.**Strain**: The ratio of the change in dimension to the original dimension of a material under stress.**Material Science**: The study of the properties and applications of materials, including metals, ceramics, polymers, and composites.**Friction**: The resistance to motion between two surfaces in contact.**Tribology**: The study of friction, wear, and lubrication of interacting surfaces.**Thermal Engineering**: The study of heat transfer and energy conversion processes.**Fluid Mechanics**: The study of fluids (liquids and gases) and their behavior under various conditions.**Solid Mechanics**: The study of the behavior of solid materials under external loads.**Manufacturing Engineering**: The branch of engineering focused on the processes used to create products from raw materials.**CAD (Computer-Aided Design)**: The use of computer software to aid in the creation, modification, analysis, or optimization of designs.**CAM (Computer-Aided Manufacturing)**: The use of computer software to control machine tools and related manufacturing processes.**CNC (Computer Numerical Control)**: The automation of machine tools and related processes via computer control.**Finite Element Analysis (FEA)**: A numerical technique used for solving problems in engineering and mathematical physics.**Vibration**: The oscillation of mechanical systems about an equilibrium point.**Frequency**: The number of occurrences of a repeating event per unit of time.**Resonance**: The condition in which an external force matches the natural frequency of a system, causing it to oscillate with increased amplitude.**Modal Analysis**: The study of the dynamic characteristics (natural frequencies and mode shapes) of structures.**Fatigue**: The weakening of a material caused by repeated loading and unloading.**Creep**: The gradual deformation of a material under a constant load over time.**Young’s Modulus**: A measure of the stiffness of a material, describing how much it deforms under stress.**Shear Modulus**: A measure of a material’s stiffness in shear deformation.**Poisson’s Ratio**: A measure of the ratio of transverse contraction strain to longitudinal extension strain in the direction of stretching force.**Safety Factor**: The ratio of the maximum stress a material can sustain to the maximum stress experienced in a particular application.**Kinetic Energy**: The energy possessed by a body due to its motion.**Potential Energy**: The energy possessed by a body due to its position or configuration relative to other objects.**Work**: The product of force and displacement in the direction of the force.**Power**: The rate at which work is done or energy is transferred.**Heat Transfer**: The process of exchange of thermal energy between physical systems.**Conduction**: The transfer of heat through a material without the movement of the material itself.**Convection**: The transfer of heat through the movement of a fluid (liquid or gas).**Radiation**: The transfer of heat through electromagnetic waves.**Refrigeration**: The process of removing heat from a space, substance, or system to lower its temperature.**Thermal Insulation**: Material used to reduce the rate of heat transfer.**Reynolds Number**: A dimensionless quantity used to predict the flow regime of fluids in various engineering applications.**Bernoulli’s Equation**: An equation describing the conservation of energy in fluid flow, often used to analyze fluid dynamics problems.**Laminar Flow**: Fluid flow characterized by smooth, parallel layers with minimal mixing.**Turbulent Flow**: Fluid flow characterized by irregular, chaotic motion with significant mixing.**Hydrostatics**: The study of fluids at rest and the forces acting on them.**Hydrodynamics**: The study of fluids in motion and the forces acting on them.**Pump**: A device that adds energy to a fluid, increasing its pressure or velocity.**Compressor**: A device that increases the pressure of a gas by reducing its volume.**Turbine**: A machine that converts the energy of a moving fluid (liquid or gas) into mechanical energy.**Nozzle**: A device used to control the direction or speed of fluid flow.**Throttle Valve**: A valve used to control the flow of a fluid by varying the size of the passage.**Gauge Pressure**: The pressure relative to atmospheric pressure.**Absolute Pressure**: The pressure relative to a perfect vacuum.**Vacuum**: A space entirely devoid of matter, typically achieved by removing air or other gases.**Hooke’s Law**: A principle stating that the force needed to extend or compress a spring by some distance is proportional to that distance.**Gear**: A rotating machine part with teeth designed to transmit torque to another gear or device.**Bearing**: A machine element that constrains relative motion to only the desired motion, reducing friction between moving parts.**Coupling**: A device used to connect two shafts together at their ends for the purpose of transmitting power.**Crankshaft**: A shaft with one or more cranks that convert reciprocating motion into rotational motion or vice versa.**Camshaft**: A rotating shaft used to operate poppet valves in internal combustion engines.**Clutch**: A device used to connect and disconnect a rotating shaft (usually driving and driven) in a power transmission system.**Brake**: A device used to slow or stop the motion of a moving part by converting kinetic energy into heat.**Screw**: A mechanical device that converts rotational motion to linear motion or vice versa.**Bolt**: A threaded fastener with a head that is intended to be tightened or released using a wrench.**Nut**: A fastener with a threaded hole used to tighten bolts and screws.**Welding**: A fabrication process that joins materials, usually metals or thermoplastics, by causing fusion.**Casting**: A manufacturing process in which a liquid material is poured into a mold and allowed to solidify.**Forging**: A manufacturing process involving the shaping of metal using localized compressive forces.**Machining**: A subtractive manufacturing

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