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剪切
相关语句
  shear
    Study on Microcosmic Mechanism of Adiabatic Shear Behavior in Orthogonal Cutting of High Strength Steel
    正交切削高强度钢绝热剪切行为的微观机理研究
短句来源
    THE INITIATION AND PROPAGATION OF SHEAR BAND AND CRACK DURING TORSIONAL DEFORMATION OF Ti-7Al-4Mo
    Ti-7Al-4Mo合金在扭转变形中剪切带和裂纹的形成与扩展
短句来源
    Study of Relationship between Chip Crimp and Shear Plane Shapes
    切屑卷曲与剪切面形状之间关系的研究
短句来源
    The Relationship between the Average Shear Angle in Vibration Cutting and the Shear Angle in Conventional Cutting
    振动切削平均剪切角和普通切削剪切角的关系
短句来源
    ADIABATIC SHEAR BAND IN A LOW CARBON STEEL DURING HIGH SPEED DEFORMATION
    20号钢高速变形时热塑剪切局部化的结构特征
短句来源
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  shearing
    Finite Element Method Simulation and Experimental Research on Sheet Metal Shearing and Blanking Process
    板材剪切与冲裁加工过程有限元模拟及实验研究
短句来源
    Generation and Determination of Shearing Strain of Metal during the Skew Rolling
    斜轧时金属剪切变形的产生与确定
短句来源
    ADIABATIC SHEARING PHENOMENON OF β-Ti ALLOY AT HIGH STRAIN RATE
    β-Ti合金在高应变率下的绝热剪切现象
短句来源
    Microcomputer Controlled Monitoring Device for Square and Flat Steel Shearing Machine
    带微机的方、扁钢剪切监控装置
短句来源
    Study on the Shearing Deformation Behaviour ofGreen Molding Sand
    湿型砂剪切变形性能的研究
短句来源
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  sheering
    The melting of metal jet current results not only from adiabatic sheering, but the friction between jet current and base plate also plays an important role in jet current melting .
    通过分析 ,射流熔化的原因并非仅仅来自绝热剪切 ,射流与基体的摩擦生热同样起着重要的作用。
短句来源
  “剪切”译为未确定词的双语例句
    Analysis of Stress and Deformation in Process of Plastic Cropping for Shaped Workpieces
    片状零件塑性剪切加工的应力和变形分析
短句来源
    Experimental Study on Double-Mandrel Periphery Shearingfor Steel Tubes
    钢管双芯棒圆周剪切法的实验研究
短句来源
    INFLUENCE OF MICRO-SHEAR SPEED ON MATERIAL PROPERTY OF DEFORMATION AND FRACTURE
    微型剪切速度对材料性能、变形和断裂的影响
短句来源
    JHY89 Shearer and Butt Welder Machine
    JHY89剪切对焊机
短句来源
    THE REVIEW OF THE MICROSTRUCTURE OF ADIABATIC SHBAR BANDS IN METALLIC MATERIALS
    金属材料中绝热剪切带微观结构综述
短句来源
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  shear
In this paper, the boundary stabilization of the Timoshenko equation of a nonuniform beam, with clamped boundary condition at one end and with bending moment and shear force controls at the other end, is considered.
      
It is proved that the system is exponentially stabilizable when the bending moment and shear force controls are simultaneously applied.
      
An important conclusion of wood for musical instruments with proper anisotropy, fine toughness, and weak shear of longitudinal and radial vibration was inducted.
      
Shear strengths of undisturbed and remolded soil under typical forests in Jinyun Mountain, Chongqing City, southwest China
      
Shear difference of both undisturbed and remolded soils was compared at the same vertical loading, under the condition of the same dry density and water content from the same forest land.
      
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  shearing
Numerical results of the lubrication show that the differential viscosity is the principal non-Newtonian property affecting the lubrication, it is determined by the material parameters of the lubricant and is affected by the shearing rate.
      
Considering the effects of bending-shearing strain and tensile-compression strain, the dynamic stress of the links and its position are derived by using the Kineto-Elastodynamics theory and the Timoshenko beam theory.
      
During the high-temperature wear period, severely influenced by friction heat, obvious softening and plastic flow can be found on the friction surface of the brake block, its anti-shearing ability is weakened, and adhesive wear is intensified.
      
Organic fibre is in a flowing state and obviously generates drawing, shearing, carbonization and oxidization.
      
In this method, the pre-dispersed nano-particle suspensions are blended with melting polymers in a weak shearing field using an extruder, followed by removing the water from the vent.
      
更多          
  sheering
Purity of the cell preparation depends on the surface qualities of the glass, Ca++-Mg++ concentration in the medium, temperature, density of the monolayer and intensity of sheering force used.
      
Blunt, mechanical blows to the calvaria produce sheering forces in the falx cerebri, leading to a dehiscence of the laterocaudal intradural vessels or to a rupture of the bridging veins.
      
1.Errors of laminated plastimeters used in measuring maximum sheering stress (MSS) of lubricant greases are analyzed.
      
Abrasions are caused by sheering forces on the surface of the skin.
      
We assume that sheering orders the polymer network which then orients the liquid crystal domains in the direction of shearing.
      
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Internal oil cooling of the piston and the adoption of iron insert in the first ring groove are the effective measures in reducing the temperature of the aluminium piston and improving the wear resistance property in modern intensified diesel engine.

活塞内油冷和第一环槽镶嵌铸铁环是目前在强化的柴油机上降低铝活塞温度和增加其耐磨性的有效措施。(1)本试验以NaCl和Na_2Si_2O_5为原料作水溶性盐芯铸造活塞内冷油路,并采用了以下措施:1.食盐事先在750℃焙烧,以解决盐芯热裂;2.用预变形模具以消除热胀所造成盐芯椭圓变形;3.用酒精-松香涂料以防铝液的漫渗。(2)采用镶环事先渗铝或锌的Fe-Al双金属铸造法,实现了奥氏体铸铁镶环与活塞体间具有足够剪切强度的冶金结合。

Ti-7Al-4Mo alloy specimens were hot-worked under different temperatures, and then air cooled, solution treated at 950℃ (β transus is 1010℃), quenched, aged at 600℃ for 12 hrs, air cooled to room temperature. The specimens are of cylindrical shapes. After the intense torsional deformation, three kinds of macroscopic fracture surfaces were produced.In those specimens that were extruded at temperature above the beta transus and solution treated, quenched and aged, the metallographic structure contains grain boundary...

Ti-7Al-4Mo alloy specimens were hot-worked under different temperatures, and then air cooled, solution treated at 950℃ (β transus is 1010℃), quenched, aged at 600℃ for 12 hrs, air cooled to room temperature. The specimens are of cylindrical shapes. After the intense torsional deformation, three kinds of macroscopic fracture surfaces were produced.In those specimens that were extruded at temperature above the beta transus and solution treated, quenched and aged, the metallographic structure contains grain boundary a plus aged and transformed Widmanstatten structure. Intense shear bands were found at the interface between the grain boundary a and transformed β after torsional deformation. Metallographic and electron microscopic observations indicated that most of the cracks were formed by shearing deformation along the grain boundary a. The early cracks had their orientations parallel to the maximum shearing stress. In these extruded specimens, longitudinal and transverse shear bands distributed rather uniformly,and the final rupture was tranverse to the longitudinal axis which resulted in a flat fracture surface.In those specimens that are hot-worked below the βtransus, air cooled, solution treated and aged, the metallographic structure is primary a plus transformed β. The propagation of shear bands and cracks take place in a complicated way. After torsion, there appear longitudinal as well as trans- verse shear bands. These bands may appear within the primary a or in the transformed β. When a phase is quite tough,the shear bands may first appear in transformed β. After the neighboring bands align each other, crack forms through shearing decohesion. Large primary a particles inhibit the crack, make the crack blunted and stop it. Otherwise, the crack is forced to turn away. In the early period, shear bands and cracks are controlled by the shearing stress. In the later period of the longitudinal crack, the torsional deformation makes it deflected, the magnitude of shear stress decreases, and the normal pressure will inhibit the further growth of the crack.If the material is tough, the tension stress at 45° to the longitudinal direction is unable to produce helical fracture at the end of the deflected crack.In this situation, the deflected longitudinal crack stops, and the transverse crack formed at the middle portion of the specimen grows continuously, which results in a flat fracture surface.In those specimens that are hot-rolled below the βtransus, especially when the finished temperature is rather low, anisotropy in properties is more obvious. In this case, longitudinal shear bands first begin to grow, but there are also transverse bands. If the material is less tough, the deflected longitudinal crack, in spite of having been acted by the pressure from the sides and the decrease of shearing stress, will turn to helical form by the tension stress 45° to the longitudinal direction. This results in a split mode of fracture surface.After torsion, in Ti-7Al-4Mo alloy dpecimens, shear bands and cracks usually form at the interface between the grain boundary a and aged-transformed structure. The initiation of crack,in general,does not conform to Stroh's mechanism, and also it does not appear that the normal stress and shearing stress are equally important as proposed by Smith and Barnby. We propose that the shearing stress is responsible for the decohesion mechanism. Treating dislocations as a continuous distribution, and applying the principles of fracture mechanics, we discuss the initiation of crack and at the same time, the propagation of shear band is described.

本文研究了Ti-7Al-4Mo合金在扭转变形时剪切带的产生和扩展。实验观察表明:α-β型Ti-7Al-4Mo合金棒材在单次过载扭转实验时,试样的开裂和最终的断裂方式随热加工条件不同而显著不同。在β相区加工的试样是沿晶界α相与转变了β的交界处先形成剪切带,然后沿剪切带开裂;在两相区偏低的温度加工的试样是沿初生α与转变了β的交界处形成剪切带并在此开裂。轧制试样终轧温度低,试样有各向异性,容易发生纵向集中滑移(即剪切带);挤压试样终挤温度高,各向异性小,剪切带沿纵向、横向均匀分布。纵向集中滑移带剪切开裂、扩展、导致最终劈断;横向集中滑移带剪切开裂、扩展,导致最终平断。文中用位错连续分布和断裂力学原理分析了剪切开裂的现象,并讨论了剪切带的长大。

The working principle of the automatic laser tracking transducer for welding will be described in the present work. This transducer is not restricted by the roughness of the detected surface by using the non-contact distance-detecting technique for the optical path of the direct-visual transverse focusing alignment. It can be used even to detect the uneven surface which was sheared, planed and manually gas cut. This transducer can be assembled into the single or double as required. The double receiver has various...

The working principle of the automatic laser tracking transducer for welding will be described in the present work. This transducer is not restricted by the roughness of the detected surface by using the non-contact distance-detecting technique for the optical path of the direct-visual transverse focusing alignment. It can be used even to detect the uneven surface which was sheared, planed and manually gas cut. This transducer can be assembled into the single or double as required. The double receiver has various recepting combinations. By means of recepting signal of these combinations about 30 deviational positions of butt weld groove can be detected. Above-mentioned transducer can directly track the beveled sides, the edge of weld groove as well as the artificial tracking line (plastic tape). Aforesaid transducer has been applied in production.

本文介绍了研制的焊缝激光自动跟踪传感器的工作原理.由于采用了非接触式的直视横向焦点对准光路的测距法,因此本传感器对被检测表面的光洁度没有要求.它甚至可以检测剪切、刨削和手工气割的凸凹不平的表面.根据需要,传感器可组成单接收器或双接收器。双接收器有多种接收组合,利用这些组合的接收信号可检测对接坡口的三十多种位置偏差.传感器可直接跟踪焊接坡口的斜面或棱边,也可以跟踪人为跟踪线(塑料带).上述传感器已用于生产.

 
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