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| title | chunk | source | category | tags | date_saved | instance |
|---|---|---|---|---|---|---|
| Glossary of mechanical engineering | 11/12 | https://en.wikipedia.org/wiki/Glossary_of_mechanical_engineering | reference | science, encyclopedia | 2026-05-05T07:51:05.490215+00:00 | kb-cron |
== S == Safety engineering – Screw theory – Seal – Second law of thermodynamics – states that when energy changes from one form to another form, or matter moves freely, entropy (disorder) in a closed system increases. In other words, heat always moves from hotter objects to colder objects unless energy is supplied to reverse the direction of heat flow, and not all heat energy can be converted into work in a cyclic process. Semiconductor – Series and parallel circuits – Shear force diagrams – Shear pin – Shear strength – Shear stress – Simple machine – Simulation – Slide rule – Society of Automotive Engineers – Solid mechanics – Solid modeling – Split nut – Sprung mass – Statics – Steering – Stress–strain curve – a chart which gives the relationship between stress and strain for a given material. It is obtained by gradually applying load to a test coupon and measuring the deformation. Structural failure – Student Design Competition – Surveying – Suspension – Switch – an electrical component that can disconnect or connect the conducting path in an electrical circuit, interrupting the electric current or diverting it from one conductor to another.
== T == Technical drawing – the act and discipline of composing drawings that visually communicate how something functions or is constructed. In industry and engineering, common conventions constitute a visual language and help to ensure that the drawing is precise, unambiguous and relatively easy to understand. Many of the symbols and principles of technical drawing are codified in an international standard called ISO 128. Technology – refers to both the application of knowledge for achieving practical goals in a reproducible way, and the products and tools resulting from such efforts. Tensile strength – also called ultimate tensile strength or ultimate strength, is the maximum stress that a material can withstand while being stretched or pulled before breaking. In brittle materials the ultimate tensile strength is close to the yield point, whereas in ductile materials the ultimate tensile strength can be higher. Tensile stress – Testing adjusting balancing – Theory of elasticity – Thermodynamics – a branch of physics that deals with heat, work, and temperature, and their relation to energy, entropy, and the physical properties of matter and radiation. The behavior of these quantities is governed by the four laws of thermodynamics. Third law of thermodynamics – states that the entropy of a system approaches a constant value when its temperature approaches absolute zero, because its atoms would stop moving. However, heat transfer between the system and its surroundings would prevent the system from ever reaching absolute zero. Toe – Torque – Torsion beam suspension – Torsion spring – Toughness – Track gauge – Spacing of the rails on a railway track Transmission – Truck – Truck (railway) – Chassis for wheels and suspension under railway vehicles, bogie outside U.S. Turbine – Tribology – Touch screen – tear – Tire manufacturing –
== U == Understeer – Unibody – Unsprung weight –
== V == Verification and Validation – Valve – a device or natural object (such as a heart valve) that regulates, directs or controls the flow of a fluid (gases, liquids, fluidized solids, or slurries) by opening, closing, or partially obstructing various passageways Vector – a geometric object that has magnitude (or length) and direction. A vector quantity is differentiated from a scalar quantity which only has magnitude, not direction. Vectors can be added to other vectors according to vector algebra. Vertical strength – Viscosity – Volt – the SI unit of electric potential, electric potential difference (voltage), and electromotive force, which uses the symbol V. Vibration – Velocity diagrams –
== W == Wear – is the damaging, gradual removal or deformation of material at solid surfaces. Causes of wear can be mechanical (e.g., erosion) or chemical (e.g., corrosion). The study of wear and related processes is referred to as tribology. Wedge – a triangular shaped tool, and is a portable inclined plane, and one of the six classical simple machines. It can be used to separate two objects or portions of an object, lift up an object, or hold an object in place. It functions by converting a force applied to its blunt end into forces perpendicular (normal) to its inclined surfaces. The mechanical advantage of a wedge is given by the ratio of the length of its slope to its width. Although a short wedge with a wide angle may do a job faster, it requires more force than a long wedge with a narrow angle. Weight transfer – Wheel – In its primitive form, a wheel is a circular block of a hard and durable material at whose center has been bored a hole through which is placed an axle bearing about which the wheel rotates when torque is applied to the wheel about its axis. The wheel and axle assembly can be considered one of the six simple machines. Wheel and axle – a machine consisting of a wheel attached to a smaller axle so that these two parts rotate together in which a force is transferred from one to the other. The wheel and axle can be viewed as a version of the lever, with a drive force applied tangentially to the perimeter of the wheel and a load force applied to the axle, respectively, that are balanced around the hinge which is the fulcrum. Wheelset – the wheel–axle assembly of a railroad car. The frame assembly beneath each end of a car, railcar or locomotive that holds the wheelsets is called the bogie (or truck in North America). Most North American freight cars have two bogies with two or three wheelsets, depending on the type of car; short freight cars generally have no bogies but instead have two wheelsets. Work – the energy transferred to or from an object via the application of force along a displacement. Work is a scalar quantity.
== X == X bar charts