| 释义 |
shear
shearto clip or cut; remove hair or fleece from: shear the sheep
Not to be confused with:sheer – thin; fine; transparent; steep: a sheer nightgownshear S0325100 (shîr)v. sheared, sheared or shorn (shôrn), shear·ing, shears v.tr.1. To remove (fleece or hair) by cutting or clipping.2. To remove the hair or fleece from.3. To cut with or as if with shears: shearing a hedge.4. To divest or deprive as if by cutting: The prisoners were shorn of their dignity.v.intr.1. To use a cutting tool such as shears.2. To move or proceed by or as if by cutting: shear through the wheat.3. Physics To become deformed by shear force.n.1. often shearsa. A pair of scissors.b. Any of various implements or machines that cut with a scissorlike action.2. The act, process, or result of shearing, especially when used to indicate a sheep's age: a two-shear ram.3. Something cut off by shearing.4. also sheers (shîrz)(used with a sing. or pl. verb) An apparatus used to lift heavy weights, consisting of two or more spars joined at the top and spread at the base, the tackle being suspended from the top.5. Physics a. See shear force.b. See shear strain.c. See shear stress.
[Middle English scheren, from Old English sceran; see sker- in Indo-European roots. N., from Middle English shere, from Old English scēar; see sker- in Indo-European roots.]
shear′er n.shear (ʃɪə) vb, shears, shearing or sheared, shore, sheared or shorn1. (Agriculture) (tr) to remove (the fleece or hair) of (sheep, etc) by cutting or clipping2. to cut or cut through (something) with shears or a sharp instrument3. (General Engineering) engineering to cause (a part, member, shaft, etc) to deform or fracture or (of a part, etc) to deform or fracture as a result of excess torsion or transverse load4. (often foll by: of) to strip or divest: to shear someone of his power. 5. (when: intr, foll by through) to move through (something) by or as if by cutting6. (Agriculture) Scot to reap (corn, etc) with a scythe or sicklen7. the act, process, or an instance of shearing8. (Agriculture) a shearing of a sheep or flock of sheep, esp when referred to as an indication of age: a sheep of two shears. 9. (General Engineering) a form of deformation or fracture in which parallel planes in a body or assembly slide over one another10. (General Physics) physics the deformation of a body, part, etc, expressed as the lateral displacement between two points in parallel planes divided by the distance between the planes11. either one of the blades of a pair of shears, scissors, etc12. (Mechanical Engineering) a machine that cuts sheet material by passing a knife blade through it13. (Mechanical Engineering) a device for lifting heavy loads consisting of a tackle supported by a framework held steady by guy ropes[Old English sceran; related to Old Norse skera to cut, Old Saxon, Old High German skeran to shear; see share2] ˈshearer nshear (ʃɪər)
v. sheared, sheared shorn, shear•ing, v.t. 1. to cut (something). 2. to remove by or as if by cutting or clipping: to shear wool from sheep. 3. to cut or clip the hair, fleece, wool, etc., from: to shear sheep. 4. to strip or deprive (usu. fol. by of): to shear someone of power. 5. to travel through by or as if by cutting: Chimney swifts sheared the air. 6. to subject (a solid body or structure) to shear. v.i. 7. to cut or cut through something with a sharp instrument. 8. to break along an internal plane in response to a force parallel to the plane. 9. Chiefly Scot. to reap crops with a sickle. n. 10. Usu., shears. (sometimes used with a sing. v.) a. scissors of large size (usu. used with pair of). b. any of various other cutting implements or machines having two blades that suggest those of scissors. 11. one blade of a pair of large scissors. 12. the act or process of shearing or being sheared. 13. a shearing of sheep (used in stating the age of sheep): a sheep of one shear. 14. the quantity, esp. of wool or fleece, cut off at one shearing. 15. Usu., shears. (usu. with a pl. v.) a framework for hoisting heavy weights, consisting of two or more spars with their legs separated, fastened together near the top and steadied by guys, which support a tackle. 16. a machine for cutting rigid material by moving the edge of a blade through it. 17. a. the tendency of a force applied to a solid body or structure, as a rock stratum, to cause deformation or rupture along a plane parallel to the force. b. deformation produced in this manner. [before 900; (v.) Middle English sheren, Old English sceran, c. Old Frisian skera, Old High German sceran, Old Norse skera; (n.) Middle English sheres (pl.); compare Old English scērero (pl.), scēar (feminine)] shear′er, n. shear
Past participle: sheared/shorn
Gerund: shearing
| Present |
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| I shear | | you shear | | he/she/it shears | | we shear | | you shear | | they shear |
| Preterite |
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| I sheared | | you sheared | | he/she/it sheared | | we sheared | | you sheared | | they sheared |
| Present Continuous |
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| I am shearing | | you are shearing | | he/she/it is shearing | | we are shearing | | you are shearing | | they are shearing |
| Present Perfect |
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| I have sheared/shorn | | you have sheared/shorn | | he/she/it has sheared/shorn | | we have sheared/shorn | | you have sheared/shorn | | they have sheared/shorn |
| Past Continuous |
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| I was shearing | | you were shearing | | he/she/it was shearing | | we were shearing | | you were shearing | | they were shearing |
| Past Perfect |
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| I had sheared/shorn | | you had sheared/shorn | | he/she/it had sheared/shorn | | we had sheared/shorn | | you had sheared/shorn | | they had sheared/shorn |
| Future |
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| I will shear | | you will shear | | he/she/it will shear | | we will shear | | you will shear | | they will shear |
| Future Perfect |
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| I will have sheared/shorn | | you will have sheared/shorn | | he/she/it will have sheared/shorn | | we will have sheared/shorn | | you will have sheared/shorn | | they will have sheared/shorn |
| Future Continuous |
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| I will be shearing | | you will be shearing | | he/she/it will be shearing | | we will be shearing | | you will be shearing | | they will be shearing |
| Present Perfect Continuous |
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| I have been shearing | | you have been shearing | | he/she/it has been shearing | | we have been shearing | | you have been shearing | | they have been shearing |
| Future Perfect Continuous |
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| I will have been shearing | | you will have been shearing | | he/she/it will have been shearing | | we will have been shearing | | you will have been shearing | | they will have been shearing |
| Past Perfect Continuous |
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| I had been shearing | | you had been shearing | | he/she/it had been shearing | | we had been shearing | | you had been shearing | | they had been shearing |
| Conditional |
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| I would shear | | you would shear | | he/she/it would shear | | we would shear | | you would shear | | they would shear |
| Past Conditional |
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| I would have sheared/shorn | | you would have sheared/shorn | | he/she/it would have sheared/shorn | | we would have sheared/shorn | | you would have sheared/shorn | | they would have sheared/shorn |
Thesaurus| Noun | 1. | shear - (physics) a deformation of an object in which parallel planes remain parallel but are shifted in a direction parallel to themselves; "the shear changed the quadrilateral into a parallelogram"natural philosophy, physics - the science of matter and energy and their interactions; "his favorite subject was physics"deformation - alteration in the shape or dimensions of an object as a result of the application of stress to it | | 2. |  shear - a large edge tool that cuts sheet metal by passing a blade through itedge tool - any cutting tool with a sharp cutting edge (as a chisel or knife or plane or gouge) | | Verb | 1. | shear - cut with shears; "shear hedges"prune, snip, lop, cut back, clip, crop, trim, dress - cultivate, tend, and cut back the growth of; "dress the plants in the garden" | | 2. | shear - shear the wool from; "shear sheep"fleeceshave, trim - cut closely; "trim my beard" | | 3. | shear - cut or cut through with shears; "shear the wool off the lamb"cut - separate with or as if with an instrument; "Cut the rope" | | 4. | shear - become deformed by forces tending to produce a shearing strainnatural philosophy, physics - the science of matter and energy and their interactions; "his favorite subject was physics"change - undergo a change; become different in essence; losing one's or its original nature; "She changed completely as she grew older"; "The weather changed last night" |
shearverb1. shave, fleece In the Hebrides they shear their sheep later than everyone else.plural noun1. blades, cutters, clippers, trimmers Trim the shrubs with shears.shearverbTo decrease, as in length or amount, by or as if by severing or excising:chop, clip, crop, cut, cut back, cut down, lop, lower, pare, prune, slash, trim, truncate.Translationsshear (ʃiə) – past tense sheared: past participles sheared ~shorn (ʃoːn) – verb1. to clip or cut wool from (a sheep). 剪羊毛 剪羊毛2. (past tense shorn. often with off) to cut (hair) off: All her curls have been shorn off. 剪掉 剪3. (past tense shorn. especially with of) to cut hair from (someone): He has been shorn (of all his curls). 修剪 修剪头发4. to cut or (cause to) break. A piece of the steel girder sheared off. 切斷，斷裂 切断shears noun plural a cutting-tool with two blades, like a large pair of scissors. a pair of shears. 大型裁剪工具 剪床shear
shear: see strength of materialsstrength of materials,
measurement in engineering of the capacity of metal, wood, concrete, and other materials to withstand stress and strain. Stress is the internal force exerted by one part of an elastic body upon the adjoining part, and strain is the deformation or change in
..... Click the link for more information. .Shear A shear of a plane relative to a line l in that plane is an affine transformation of the plane such that all points on / are fixed and all points on a line that is at unit distance from l undergo a shift by a vector k parallel to l; the points of a line that is at a distance ρ from l undergo a shift by the vector pk. A shear of space relative to a given plane is defined analogously.
Shear in strength of materials, a deformation of an elastic body wherein the applied forces cause a relative displacement of parallel layers or fibers of the material while the distance between the layers remains unchanged.  Figure 1
An example of shear is the deformation of a right rectangular prism (Figure l) whose base ab is fixed and to whose upper face a shearing force is applied parallel to the base. The magnitude of the displacement cc1 = dd1 is the total shearing deformation. The angle γ is the shearing strain: because the deformations involved are small, γ ≈ tan γ = cc1/bc.  Figure 2
In the case of pure shear, only the shearing stresses τ act along the faces of the prism (Figure 2). The equation τ = Gγ then holds, where G is the shearing modulus of elasticity, or shear modulus. Pure shear is a special case of plane strain and can therefore be investigated on the basis of one of the theories of strength (seeSTRENGTH OF SOLIDS). Tests of shearing strength are made, for example, for screw joints, riveted joints, welds, and notchings. L. V. KASABTAN shear[shir] (design engineering) A cutting tool having two opposing blades between which a material is cut. (engineering) An apparatus for hoisting heavy loads consisting of two or more poles fastened together at their upper ends and spread apart at their lower ends, secured or steadied by a guy or guys, and provided with a tackle. Also known as shear legs. (mechanics) shear strain (mining engineering) To make vertical cuts in a coal seam that has been undercut. Shear A straining action wherein applied forces produce a sliding or skewing type of deformation. A shearing force acts parallel to a plane as distinguished from tensile or compressive forces, which act normal to a plane. Examples of force systems producing shearing action are forces transmitted from one plate to another by a rivet that tend to shear the rivet, forces in a beam that tend to displace adjacent segments by transverse shear, and forces acting on the cross section of a bar that tend to twist it by torsional shear (see illustration). Shear forces are usually accompanied by normal forces produced by tension, thrust, or bending. Shearing stress is the intensity of distributed force expressed as force per unit area. See Stress and strain shear1. A deformation (e.g., in a beam or flexural member) in which parallel planes slide relative to each other so as to remain parallel. 2. To cut a metal with a pair of moving blades or with one moving blade and one fixed edge. 3.See shears.shear1. a form of deformation or fracture in which parallel planes in a body or assembly slide over one another 2. Physics the deformation of a body, part, etc., expressed as the lateral displacement between two points in parallel planes divided by the distance between the planes 3. a machine that cuts sheet material by passing a knife blade through it 4. a device for lifting heavy loads consisting of a tackle supported by a framework held steady by guy ropes shear
shear [shēr] an applied force that tends to cause an opposite but parallel sliding motion of the planes of an object. Such motions cause tissues and blood vessels to move in such a way that blood flow may be interrupted, placing the patient at risk for pressure ulcers. An example of a shearing force is seen when a patient slumps in a chair; the skin around the buttocks is stretched by the movement and interferes with circulation.shear (shēr), The distortion of a body by two oppositely directed parallel forces. The distortion consists of a sliding over one another of imaginary planes (within the body) parallel to the planes of the forces. [A.S.] shear (shîr)v. sheared, sheared or shorn (shôrn), shearing, shears v.tr.1. To remove (fleece or hair) by cutting or clipping.2. To remove the hair or fleece from.v.intr. To use a cutting tool such as shears.n.1. often shearsa. A pair of scissors.b. Any of various implements or machines that cut with a scissorlike action.2. The act, process, or result of shearing, especially when used to indicate a sheep's age: a two-shear ram.3. Something cut off by shearing.
shear′er n.shear (shēr) Distortion of a body by two oppositely directed parallel forces; consists of a sliding over one another of imaginary planes (within body) parallel to planes of forces. [A.S.]SHEAR
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| SHEAR➣Society for the History of the Early American Republic (Canada) |
shear
Related to shear: Shear strain, sheer, Shear transformation, Shear rateSynonyms for shearverb shaveSynonymsnoun bladesSynonyms- blades
- cutters
- clippers
- trimmers
Synonyms for shearverb to decrease, as in length or amount, by or as if by severing or excisingSynonyms- chop
- clip
- crop
- cut
- cut back
- cut down
- lop
- lower
- pare
- prune
- slash
- trim
- truncate
Synonyms for shearnoun (physics) a deformation of an object in which parallel planes remain parallel but are shifted in a direction parallel to themselvesRelated Words- natural philosophy
- physics
- deformation
noun a large edge tool that cuts sheet metal by passing a blade through itRelated Wordsverb cut with shearsRelated Words- prune
- snip
- lop
- cut back
- clip
- crop
- trim
- dress
verb shear the wool fromSynonymsRelated Wordsverb cut or cut through with shearsRelated Wordsverb become deformed by forces tending to produce a shearing strainRelated Words- natural philosophy
- physics
- change
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