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岩石试件     
相关语句
  rock sample
     EXPERIMENTAL STUDY ON SOME RELATIONS BETWEEN PORE-PRESSURE AND DEFORMATION-FRACTURE OF ROCK SAMPLE WITH DISTINCT STRUCTURE
     不同结构的岩石试件变形破坏与孔隙压力关系的实验研究
短句来源
     The Imitating Test Study of Sliding Process for the Single Fault Rock Sample
     含单一滑面岩石试件滑动过程的模拟实验研究
短句来源
     Measurement of displacement of rock sample by means of white light scattered
     白光散斑法测岩石试件位移
短句来源
     The results show that if |KF/KS|>1, an abrupt rupture in rock sample occurs;
     结果表明:当|KF/KS>1时,岩石试件产生突发断裂,当|KF/KS|<1时,岩石试件产生缓裂。
短句来源
     Based on the theory of fracture mechanics, the failure procedure of rock sample which includes cracks was simulated.
     本文运用断裂力学的有关理论,采用数值模拟方法对含裂纹岩石试件的破坏进行了模拟,为后面裂隙岩体隧道开挖计算提供一种方法。
短句来源
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  rock specimen
     The model of plastic shear strain gradient on size effect in uniaxial compression of rock specimen
     岩石试件尺寸效应的塑性剪切应变梯度模型
短句来源
     In this paper, the attenuation phenomenon of stress wave transmitted through a fractured rock specimen has been studied by the method of the Split-Hopkinson bar.
     本文用 Split-Hopkinson 压力杆装置研究了应力波通过破裂岩石试件的衰减现象。
短句来源
     The attenuation of stress wave transmitted through a fractured rock specimen and the decrease of dynamic strength of rock have been found in studying the dynamic behavior of rock by the method of the Split-Hopki'nson bar.
     用Split-Hopkinson压力杆方法研究岩石的动态特性时,发现应力波通过破裂岩石试件产生的衰减和岩石动态强度的降低。
短句来源
     It has been proved that the existence of the deformational behaviour for the rock of class Ⅱ is conditional, that is , when 1-2 π EλlL>0 the behaviour manifests itself. The influence of the height of rock specimen, the descending modulus λ of rock and the internal length l on the class Ⅱ behavior has been discussed.
     文中证明Ⅱ类岩石变形行为是有条件存在的,只要岩石试件的长度L,弹性模量E,峰值后降模量λ及岩石内部长度l 满 足1 - 2 π(1 + Eλ) lE > 0 ,就会出现Ⅱ类变形行为,并分析了Ⅱ类岩石变形行为发生的影响因素
短句来源
     RESEARCH ON THE END FICTIONAL EFFECT OF ROCK SPECIMEN AND PARAMETER SENSITIVITY
     岩石试件端面摩擦效应及参数敏感性研究
短句来源
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  rock samples
     Implementing the acoustic emission experiments with the large-scaled rock samples, LURR (Load/Unload Response Ratio) theory was studied.
     利用大尺度岩石试件破坏声发射实验 ,对加卸载响应比 (Load UnloadResponseRatio)理论进行了实验研究。
短句来源
     The rupture experiments for rock samples of different properties and structures duringuniaxial loading were made in laboratory. The following major results were obtained:(1)Theradiation temperature of rock samples changed along with increasing of stress,the range oftemperature change was 0.2℃-0.8℃。
     在实验室对不同岩性不同结构的岩石试件进行单轴加载至试件破裂试验,得出了如下主要结果:(1)岩石试件的红外辐射温度随应力增加而变化,温度变化的范围在0.2℃-0.8℃。
短句来源
     Research and Designing of Multi-function Testing Device for Standard Rock Samples
     多功能标准岩石试件检测仪的研究与设计
短句来源
     The observational result of crack fracture form for rock samples with close crack under unloading after the peak compression shear load.
     介绍了对含闭合裂缝岩石试件在达到峰值压剪荷载时卸荷的裂缝断裂形态观察结果。
短句来源
     In these experiments, plane wave dynamite lenses were used to drive the flying plates. The flying plate hits the target and produces an ultrahigh-pressure shock wave. The propagation velocity and the particle velocity of shock wave in rock samples ware measured by probes, and the relation between density of rocks and pressure was obtained by the Rankine-Hugonito formula.
     本实验应用平面波炸药透镜驱动飞板撞击靶板产生超高压冲击波,并用探针测量冲击波在岩石试件中的传播速度和粒子速度,再由 Rankine-Hugoniot 方程得到岩石的密度与压力之间的关系.
短句来源
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  rock specimens
     The rock specimens are the cylinders with 30mm diameter and 75mm height.
     岩石试件为圆柱形,直径30mm,高度75mm。
短句来源
     In such a case, the sum of the lateral strains of the specimen near fracfure must exceed its axial strain, that is |ε_2+ε_3|>ε_1. The poisson's ratio of the rock specimens in such compression tests is far from constant.
     在这种情况下,临破坏前,试件的侧向应变总和一定超过轴向应变值,即|ε2+ε3|>ε1,岩石试件在这种压缩试验下泊松比也不是常数。
短句来源
     A experimental study of rock specimens by moire methods
     岩石试件的云纹法实验研究
短句来源
     NUMERICAL SIMULATION OF THE END FRICTIONAL EFFECT OF ROCK SPECIMENS
     岩石试件端面摩擦效应数值模拟研究
短句来源
     The stress field and the failure patterns of the rock specimens are analyzed base on MATLAB and FLAC2D. The results show that for hard rock the initial failure is not sure at the center of specimen, but may is at the some place along the axial line of specimen;
     通过对劈裂试验试件内应力场的分析,用MATLAB程序绘制出试件内应力场解析解的分布图,结合FLAC2D的模拟结果,认为对于不同的岩石,试件的破坏方式不同,硬岩不一定是从试件中心首先破坏,而是试件轴线上的某个部位;
短句来源
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      rock sample
    A technique for studying the processes of mechanical action on a newly formed crack and a device with a movable waveguide used to form fixed cracks in a rock sample in laboratory conditions are described.
          
    The products of shock metamorphism in the J?nisj?rvi astrobleme in Karelia, Russia, are compared with the results of experiments in which spherical converging shock waves affected a spherical rock sample.
          
    Experimental studies on perturbed acoustic resonant spectroscopy by a small rock sample in a cylindrical cavity
          
    Furthermore, the resonant amplitude increases firstly and then decreases if the porosity of the rock sample is relatively small.
          
    Result of the experiment shows: WhenR>amp;gt;0.20, the rock sample would rupture abruptly; whereas whenR>amp;lt;0.20, the rock samples would rupture slowly.
          
    更多          
      rock specimen
    A rock specimen with defects is characterized by a high loss of vibrational energy, which leads to the overlapping of the resonant responses.
          
    Entire deformational characteristics and strain localization of jointed rock specimen in plane strain compression
          
    Shear band (SB), axial, lateral and volumetric strains as well as Poisson's ratio of anisotropic jointed rock specimen (JRS) were modeled by Fast Lagrangian Analysis of Continua (FLAC).
          
    Numerical results show that rock specimen becomes soft (lower strength and hardening modulus) as pore pressure increases, leading to higher displacement skip across shear band.
          
    In the process of snap-back, the velocity skip across shear band is lower for rock specimen at higher pore pressure, showing the slower velocity of snap-back.
          
    更多          
      rock samples
    This paper analyzes the quantitative grain fluorescence (QGF) and quantitative grain fluorescence on extract (QGF-E) properties of 101 rock samples by using quantitative grain fluorescence techniques.
          
    The model was tested for the case of tangential stresses when studying the polyacrylamide-aluminium acetate solutions and for the normal stresses, when studying the strain of the rock samples saturated with oil.
          
    Experimental investigation of countercurrent capillary imbibition (CCI) in natural rock samples at various temperatures
          
    The developed method has been successfully applied to the determination of cerium in high purity rare-earth oxides, soil, natural water, plant tissue, human hair, and rock samples.
          
    The K-Ar and Rb-Sr signatures of whole-rock samples of terrigenous-clayey Riphean rocks from the Yudoma-Maya Trough were studied.
          
    更多          
      rock specimens
    Three types of rock specimens, three-point bending specimen, anti-symmetric four-point bending specimen and direct shearing specimen, were used to achieve Mode I, Mode II and mixed mode I-II fracture, respectively.
          
    Experimental study of spinel-garnet phase transition was carried out using natural mineral and rock specimens from xenolith of mantle rocks in Cenozoic basalt as starting materials.
          
    The experimental research onb value of AE for the rock specimens with pre-existing crack or notch under uniaxial compression
          
    Since the 1960's Mogi, Scholz and others have studied AE of rock specimens in laboratory and discovered that it is related to natural earthquakes.
          
    In this study, 2D finite element method (FEM) was used to calculate the stress field of rock specimens in different sizes with fixed-size elliptic holes.
          
    更多          


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    本文叙述在高围压下用各种靜力学方法及动力学方法测定岩石試件的弹性参量。曾对在地壳中分布甚广的岩石:輝綠岩、玄武岩、花崗岩及石灰岩进行了測定。結果表明,在压力为1—1000公斤/厘米~2范围內,上述岩石的弹性参量均随压力的升高而不断增加。从弹性力学的概念出发,闡明了靜力弹性参量及动力弹性参量的差別,对比了各种不同方法測定的結果,以及它們随压力变化的情况。指出在实践中分別采用靜力弹性参量及动力弹性参量的合理性。

    This paper deals especially with the propagation of a 2mm thick saw-cut inclined 45° to the axis of the rock specimen of 5×5×12.5cm and filled with epoxy so as to simulate the development of an earthquake of continental interior. The specimen was loaded in uniaxial compression and attached with a measuring system consisting of strain gages, acoustic emission and wave travelling.Characteristics of failure modes observed in this experimental studies were as follows:1. Creep along the fault face occurred at a very...

    This paper deals especially with the propagation of a 2mm thick saw-cut inclined 45° to the axis of the rock specimen of 5×5×12.5cm and filled with epoxy so as to simulate the development of an earthquake of continental interior. The specimen was loaded in uniaxial compression and attached with a measuring system consisting of strain gages, acoustic emission and wave travelling.Characteristics of failure modes observed in this experimental studies were as follows:1. Creep along the fault face occurred at a very low compressive load without any foreshocks, of course, it would generate precursors such as groundsurface displacements and groundwater level variations.2. As the load increased, a tearing-off crack started to develop at the existing fault tip nearly perpendicular to the fault plane, and appeared to arise initially from the creep process. The propagation of this primary crack was stable and its path was curvilinear. After a considerable primary crack propagation, a second tension crack developed again at the same tip and extended downward to the edge of the specimen, but without any stress drop before overall rupture. During cracking, both the number of acoustic emissions and the wave travelling time increased as time going on. The former phenomenon is equivalent to and the latter is caused by the foreshocks.3. As the compressive load reached a critical level, shear rupture, behaving like mainshock, took place suddenly at the fault end" zone under intensively compressive stress concentration and directed relatively to the tension cracks with angles of varing about from >30° to<90°. Obviously, this was due to the distribution of both the unadmis-sible shear stress from the sliding plane and the tensile stress from the cracked zone to the neighbouring region capable of sustaining an increase of stress.Finally, our results in applying to the prediction of continental earthquakes suggest that large shock should be preceeded first by a fault creep and then by a number of small shocks in tensile cracked regions trending in different directions from the main shear failure plane. In other words, the processes of deformation and fracture of a rock mass would vary in time and in space, which may be used as a guide how to estimate as well as possible the relative locations of precursors and foreshocks to the mainshocks.

    本文主要以岩石试件切口在单轴压缩条件下的扩张来模拟大陆内部断层端部扩张型地震的孕育过程。在实验中观测了试件在外力作用下的应力-应变关系、张裂纹和剪切破坏在时间和空间上的扩展顺序,以及由此引起的声发射和纵波走时变化特征。根据实验结果讨论了由断层端部扩展引起地震的前兆——如断层蠕滑、前震迁移路径、地下水和地形变等各类地震前兆上显示的差异性,对于观测前兆和前震区与主震区的相对位置,具有一定的指导意义。

    This paper presents a brief introduction of Type FM stiff testing apparatus mountedon a conventional testing machine. The apparatus consists of a thermal loading system and a stiff supported System.The hydraulic loading System in the conventional testing machine is used to pre-load the specimen and the final displacement of the machine is obtained through the thermal expansion of the steel column of the thermal loading system. Due to the overloding prevention of the column of the stiff-suppOrted system, stablized...

    This paper presents a brief introduction of Type FM stiff testing apparatus mountedon a conventional testing machine. The apparatus consists of a thermal loading system and a stiff supported System.The hydraulic loading System in the conventional testing machine is used to pre-load the specimen and the final displacement of the machine is obtained through the thermal expansion of the steel column of the thermal loading system. Due to the overloding prevention of the column of the stiff-suppOrted system, stablized slow breakdown of the specimen can be achieved after its instantaneous strength thus the complete stres strain curves can be obtained fo rocks.

    本文扼要地介绍了安装于普通压力试验机上的FM型刚性试验装置。该装置由热加载系统和刚性支承系统所组成。试验时利用原试验机上的液压系统对试件进行预加载,而最终的位移由热加载系统中钢柱的热膨胀取得。由于刚性支承系统的过栽保护作用,试件达到强度极限后,可以得到稳定缓慢的破坏,从而可以得到岩石的全程应力——应变曲线。本装置结构简单,造价低廉。在普通试验机上附加一套FM型刚性试验装置即可构成刚性试验系统,可收一机多用的效益。本文介绍了利用FM型刚性试验装置对四种岩石试件试验的结果。

     
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