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Shear
Shear may refer to: Textile production *Animal shearing, the collection of wool from various species **Sheep shearing *The removal of nap during wool cloth production Science and technology Engineering *Shear strength (soil), the shear strength of soil under loading *Shear line (locksmithing), where the inner cylinder ends and the outer cylinder begins in a cylinder lock *Shearing (manufacturing), a metalworking process which cuts stock without the formation of chips or the use of burning or melting *Shear (sheet metal), various tools to shear sheet metal *Board shear, in bookbinding, a tool to cut board or paper *Shear pin, in machinery, such as a plough, designed to shear (break) when a certain force is exceeded, to protect other components of the machine. *Shearing interferometer, in optics, a simple and very common means to check the collimation of beams by observing interference *Shearing in computer graphics, more commonly called screen tearing *Shear wall, a wall composed o ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Sheep Shearing
Sheep shearing is the process by which the woollen fleece of a sheep is cut off. The person who removes the sheep's wool is called a '' shearer''. Typically each adult sheep is shorn once each year (a sheep may be said to have been "shorn" or "sheared", depending upon dialect). The annual shearing most often occurs in a shearing shed, a facility especially designed to process often hundreds and sometimes more than 3,000 sheep per day. Sheep are shorn in all seasons, depending on the climate, management requirements and the availability of a woolclasser and shearers. Ewes are normally shorn prior to lambing in the warmer months, but consideration is typically made as to the welfare of the lambs by not shearing during cold climate winters. However, in high country regions, pre lamb shearing encourages ewes to seek shelter among the hillsides so that newborn lambs aren't completely exposed to the elements. Shorn sheep tolerate frosts well, but young sheep especially will suffe ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Shearer (other)
A shearer is someone who shears, such as a cloth shearer, or a sheep shearer. Origins of the name include from near Bergen in Norway 1600s weden of that periodas ''Skea'' (pronounced "Skeg" meaning "beard") and Heddle (meaning market place) as migrated to The Orkney Islands where the name 'Shearer' is found in Church marriage records of the time and as quite prolific for the overall population. Members of those family Shearer migrated to Australia and New Zealand in the 19th century and represents the highest concentration of nation for the name globally Additionally, Shearers are some kind of mining machines used for continuous mining Additionally, Shearer is a surname: In sports *Alan Shearer (born 1970), English footballer *Bob Shearer (born 1948), Australian professional golfer and golf course architect * Bobby Shearer (1931–2006), Scottish footballer * Brad Shearer (born 1955), Gridiron stalwart *Dale Shearer (born 1965), Australian rugby league player * Dave Shearer (b ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Shears (other)
Shears may refer to: Cutting devices * Scissors, also called shears * Hair-cutting shears * Blade shears, typically used for shearing animals * Grass shears, for lawn trimming * Kitchen shears, scissors used in the kitchen for food preparation * Pinking shears, scissors where the blades are sawtoothed instead of straight; they leave a zigzag pattern instead of a straight edge * Pruning shears, for cutting branches and stems * Snips, for cutting metal * Trauma shears, scissors used by emergency medical personnel to cut clothing People * Albert Shears (born 1900), English footballer * Augustus Shears (1827–1911), English clergyman * Curtis Shears (1901–1988), American Olympic fencer * Ernest Shears (1849–1917), Anglican clergyman in South Africa * George Shears (1890–1978), Major League Baseball pitcher * Jake Shears (born 1978), lead vocalist for the American music group Scissor Sisters * Philip James Shears (1887–1972), British Army officer * Stevie Shears (born c. 1950) ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Shear (surname)
Shear is a surname. Notable people with the surname include: *Barry Shear (1923–1979), American film director and producer *Byron D. Shear (1869–1929), American politician *Claudia Shear (born 1962), American actress and playwright *Cornelius Lott Shear (1865–1956), American mycologist and plant pathologist * David B. Shear (born 1954), American diplomat * Harold E. Shear (1918–1999), American Navy admiral *Joe Shear (1943–1998), American race car driver *Jules Shear (born 1952), American singer-songwriter * Linda Shear (born 1948), American musician * Marie Shear (1940–2017), American writer and activist * Matthew Shear (born 1984), American actor *Michael D. Shear, American journalist *Rhonda Shear (born 1954), American entertainer and entrepreneur *Tom Shear Tom Shear is an American musician and music producer, and is the sole member of the electronic act Assemblage 23. He was born on November 12, 1971 in State College, Pennsylvania, where he lived until he was ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Shear (fluid)
Shear stress, often denoted by (Greek: tau), is the component of stress coplanar with a material cross section. It arises from the shear force, the component of force vector parallel to the material cross section. ''Normal stress'', on the other hand, arises from the force vector component perpendicular to the material cross section on which it acts. General shear stress The formula to calculate average shear stress is force per unit area.: : \tau = , where: : = the shear stress; : = the force applied; : = the cross-sectional area of material with area parallel to the applied force vector. Other forms Wall shear stress Wall shear stress expresses the retarding force (per unit area) from a wall in the layers of a fluid flowing next to the wall. It is defined as: \tau_w:=\mu\left(\frac\right)_ Where \mu is the dynamic viscosity, u the flow velocity and y the distance from the wall. It is used, for example, in the description of arterial blood flow in which case which there ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Shear Stress
Shear stress, often denoted by (Greek: tau), is the component of stress coplanar with a material cross section. It arises from the shear force, the component of force vector parallel to the material cross section. ''Normal stress'', on the other hand, arises from the force vector component perpendicular to the material cross section on which it acts. General shear stress The formula to calculate average shear stress is force per unit area.: : \tau = , where: : = the shear stress; : = the force applied; : = the cross-sectional area of material with area parallel to the applied force vector. Other forms Wall shear stress Wall shear stress expresses the retarding force (per unit area) from a wall in the layers of a fluid flowing next to the wall. It is defined as: \tau_w:=\mu\left(\frac\right)_ Where \mu is the dynamic viscosity, u the flow velocity and y the distance from the wall. It is used, for example, in the description of arterial blood flow in which case which ther ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Shear (comics)
Shear (Walther Feyzioglu) is a fictional character, a Marvel Comics superhero (but not in the Marvel Universe), member of the Strikeforce: Morituri (a series in its own mostly self-contained continuity). The character was created by Peter B. Gillis and Brent Anderson. Publication history Shear was created by writer Peter B. Gillis and artist Brent Anderson and debuted in ''Strikeforce: Morituri'' #13 (December 1987). Shear remained in the regular cast of the book until his death in ''Strikeforce: Morituri'' #25. Fictional character biography Walther Feyzioglu was born in Germany, the son of Turkish immigrants. He grew to become an aggressive young man, partially because of the racism his family faced. In 2073, he was working in a factory in İzmir, Turkey, when he applied to participate in the Morituri program, a scientific program which grants superhuman abilities to its recipients, to be used as Earth's soldiers in its ongoing war against the invading alien race known as the ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Shear Strength
In engineering, shear strength is the strength of a material or component against the type of yield or structural failure when the material or component fails in shear. A shear load is a force that tends to produce a sliding failure on a material along a plane that is parallel to the direction of the force. When a paper is cut with scissors, the paper fails in shear. In structural and mechanical engineering, the shear strength of a component is important for designing the dimensions and materials to be used for the manufacture or construction of the component (e.g. beams, plates, or bolts). In a reinforced concrete beam, the main purpose of reinforcing bar (rebar) stirrups is to increase the shear strength. Equations For shear stress \tau applies :\tau = \frac , where :\sigma_1 is major principal stress and :\sigma_3 is minor principal stress. In general: ductile materials (e.g. aluminum) fail in shear, whereas brittle materials (e.g. cast iron) fail in tension. See ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Wind Shear
Wind shear (or windshear), sometimes referred to as wind gradient, is a difference in wind speed and/or direction over a relatively short distance in the atmosphere. Atmospheric wind shear is normally described as either vertical or horizontal wind shear. Vertical wind shear is a change in wind speed or direction with a change in altitude. Horizontal wind shear is a change in wind speed with a change in lateral position for a given altitude. Wind shear is a microscale meteorological phenomenon occurring over a very small distance, but it can be associated with mesoscale or synoptic scale weather features such as squall lines and cold fronts. It is commonly observed near microbursts and downbursts caused by thunderstorms, fronts, areas of locally higher low-level winds referred to as low-level jets, near mountains, radiation inversions that occur due to clear skies and calm winds, buildings, wind turbines, and sailboats. Wind shear has significant effects on the control of a ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Shear (geology)
Boudinaged quartz vein (with strain fringe) showing ''Fault (geology)">sinistral shear sense'', Starlight Pit, Fortnum Gold Mine, Western Australia In geology, shear is the response of a rock to deformation usually by compressive stress and forms particular textures. Shear can be homogeneous or non-homogeneous, and may be pure shear or simple shear. Study of geological shear is related to the study of structural geology, rock microstructure or rock texture and fault mechanics. The process of shearing occurs within brittle, brittle-ductile, and ductile rocks. Within purely brittle rocks, compressive stress results in fracturing and simple faulting. Rocks Rocks typical of shear zones include mylonite, cataclasite, S-tectonite and L-tectonite, pseudotachylite, certain breccias and highly foliated versions of the wall rocks. Shear zone A shear zone is a tabular to sheetlike, planar or curviplanar zone composed of rocks that are more highly strained than rocks adjacent to ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Shear Mapping
In plane geometry, a shear mapping is a linear map that displaces each point in a fixed direction, by an amount proportional to its signed distance from the line that is parallel to that direction and goes through the origin. This type of mapping is also called shear transformation, transvection, or just shearing. An example is the mapping that takes any point with coordinates (x,y) to the point (x + 2y,y). In this case, the displacement is horizontal by a factor of 2 where the fixed line is the x-axis, and the signed distance is the y coordinate. Note that points on opposite sides of the reference line are displaced in opposite directions. Shear mappings must not be confused with rotations. Applying a shear map to a set of points of the plane will change all angles between them (except straight angles), and the length of any line segment that is not parallel to the direction of displacement. Therefore, it will usually distort the shape of a geometric figure, for example tur ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Simple Shear
Simple shear is a deformation in which parallel planes in a material remain parallel and maintain a constant distance, while translating relative to each other. In fluid mechanics In fluid mechanics, simple shear is a special case of deformation where only one component of velocity vectors has a non-zero value: :V_x=f(x,y) :V_y=V_z=0 And the gradient of velocity is constant and perpendicular to the velocity itself: :\frac = \dot \gamma , where \dot \gamma is the shear rate and: :\frac = \frac = 0 The displacement gradient tensor Γ for this deformation has only one nonzero term: :\Gamma = \begin 0 & & 0 \\ 0 & 0 & 0 \\ 0 & 0 & 0 \end Simple shear with the rate \dot \gamma is the combination of pure shear strain with the rate of \dot \gamma and rotation with the rate of \dot \gamma: :\Gamma = \begin \underbrace \begin 0 & & 0 \\ 0 & 0 & 0 \\ 0 & 0 & 0 \end \\ \mbox\end = \begin \underbrace \begin 0 & & 0 \\ & 0 & 0 \\ 0 & 0 & 0 \end \\ \mbox \end + \begi ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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