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   裂纹长度 在 建筑科学与工程 分类中 的翻译结果: 查询用时:0.413秒
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裂纹长度
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  crack length
    (4) The bending strength, the critical crack length andthe critical crack mouth opening of concrete beams are size dependence. Theinfluence of stress-crack opening relationship on the above materialparameters is significant.
    (4)混凝土梁的抗弯强度、临界裂纹长度、临界裂纹口张开位移等抗弯性能参数都具有明显的尺寸依赖性,σ-w 关系对于这些参数的尺寸效应的影响十分显著。
短句来源
    Experimental research and theoretical analysis of critical load selection, difference between specimens with and without fatigue crack, and crack length and width effects were carried out.
    对其中临界荷载的选取、有无疲劳裂纹的差别以及裂纹长度和宽度的影响等进行了实验研究和理论分析。
短句来源
    Crack length estimated by unloading tangent and secant compliances are approximately equal to the traction-free segment of crack and the measured crack length respectively.
    分析表明,根据卸载切线柔度估计的裂纹长度近似地等于裂纹的无表面力段长度,根据割线柔度估计的裂纹长度等于测量的裂纹长度;
短句来源
    For a given specimen and notch configuration, maximum load is always dependent on the crack length and independent of the material.
    对于特定的试样和裂口几何形状,最大荷载与裂纹长度有关,而与材料无关。
短句来源
    The revision of crack length is systematically studied.
    对裂纹长度的修正作了系统的研究。
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    the interface stress, beam deformation and energy release rate (ERR) of 4ENF are derived in this study in the new light of the crack tip deformation as well as the numerical finite element analysis.
    其次,本文基于Timoshenko梁理论,考虑了剪切变形和裂纹尖端变形的影响,对双参数弹性地基上的4ENF的Ⅱ型断裂进行了分析,得到了4ENF的柔度和能量释放率的解析式,柔度与裂纹长度成正比。
短句来源
    The result shows that the gas concrete is sensible in crackle,the value of fracture toughness doesn't depend on initial crackle length,and for the large samples,the values of fracture energy and fracture toughness fits the equation K~2_(IC)=EG_F.
    结果表明,加气混凝土是断裂敏感的,断裂韧性值不决定于初始裂纹长度,对于大尺寸试件,所测断裂能和断裂韧性值符合方程K2IC=EGF,已成为有效值。
短句来源
    Then,two symmetrical minor cracks were placed in the structure,and the effects of variation in the lengths of the minor cracks on the stress intensity factors of the main crack were analyzed.
    然后,考虑2条对称的副裂纹,分析计算了混凝土梁的副裂纹长度对主裂纹应力强度因子的作用效果,获得了副裂纹长度对主裂纹应力强度因子的影响规律。
短句来源
    The influences of the length of cracks and heterogeneity are studied in uniaxial direct tension. Then in uniaxial compression the fracture processes of samples with one or two pre-existing cracks are simulated. And the influences of geometries and distance of two pre-existing cracks on interaction mechanisms of two pre-existing cracks are studied.
    5、利用该模型模拟了岩石试样中裂纹的扩展过程,研究了其扩展机理,首先模拟了单轴拉伸条件下I型裂纹扩展过程,研究了裂纹长度、非均质性等对裂纹扩展的影响,然后研究了单轴压缩条件下,含单个、两个预制裂纹的岩石试样的破坏过程以及扩展机理,分析两裂纹的不同几何位置、间距对裂纹相互作用的影响。
短句来源
    It is then divided into some slices with 4~8mm thick and length of each crack is measured to obtain the crack front in the specimen.
    然后,把试件切成厚度为4~8mm的岩片并测量每一岩片上的裂纹长度,以获得各试件的裂纹前端曲线。
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  crack length
The relationship between medial crack length and normal loading was also investigated when specimens were indented by symmetrical wedges with interior angles of 30°-120°.
      
The magnitude of the finite dynamic stress field depends on the crack length, the parameter describing the functionally graded materials, the circular frequency of the incident waves and the lattice parameter of materials.
      
It is also found analytically that the energy release rates remain constant once the interface fractures, independent of the initial crack length.
      
An algorithm for separate determination of the interfacial adhesion and friction from experimental relationships between the crack length and applied load is described.
      
The effects of crack length and patch geometries including the length and number of plies on the failure behavior of the repair were identified.
      
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The measurement of fracture toughness KIC for 5 rock types, such as marble, granite, limestone, etc., is described in this paper. Rocks and metals manifested different features of behaviors in the research. Experimental research and theoretical analysis of critical load selection, difference between specimens with and without fatigue crack, and crack length and width effects were carried out. It is noted in this paper that the crack propagation mechanism is different between the specimens with and without fatigue...

The measurement of fracture toughness KIC for 5 rock types, such as marble, granite, limestone, etc., is described in this paper. Rocks and metals manifested different features of behaviors in the research. Experimental research and theoretical analysis of critical load selection, difference between specimens with and without fatigue crack, and crack length and width effects were carried out. It is noted in this paper that the crack propagation mechanism is different between the specimens with and without fatigue crack due to the influence of structural discontinuities in rocks, and as a consequence KIC has a noticable difference; the KIC decreases while the crack width is increasing from 0.02 to 0.3 mm5 and the values of KIc for rocks are linear dependent with the tensile strength measured using the Brazil test. Consequently some suggestions for the measurement of rock fracture toughness using three-point-bend method are proposed.

本文叙述了用三点弯曲方法对大理岩、石灰岩、花岗片麻岩等五种岩石试件断裂韧度K_(IC)值的测定工作。指出了测定工作中岩石材料和金属材料表现出的不同特点。对其中临界荷载的选取、有无疲劳裂纹的差别以及裂纹长度和宽度的影响等进行了实验研究和理论分析。文中提出:由于岩石结构弱面的影响,有、无疲劳裂纹的试件的裂纹扩展机理不同,因而K_(IC)值有明显差别;随着裂纹宽度由0.02增至0.3毫米,其K_(IC)值反而下降;岩石的K_(IC)值与劈裂法测得的抗拉强度值线性相关。最后对岩石采用三点弯曲方法提出了一些建议。

In the case of sub-brittle fracture, at the crack tip there is a small plastic region of which effect should not be neglected. In this paper, the authors consider that both the crack length and the stress at infinity change are due to plasticity, and compared the results calculated by five different methods.

在准脆性断裂情况下,裂纹顶端存在一个不能忽略其影响的小范围塑性区。本文中我们考虑了幂硬化材料工型裂纹由于塑性变形时,裂纹长度和外加应力同时变化的情况。据此,用五种不同的方法进行了计算和相互比较。

The author used the chevron notched short-rod specimen for fracture toughness test suggested by ISRM in his experiment. The specimen is Kallax gabbro from Sweden with diameter of 71.4mm. Under a certain load level, flourescent penetrant is injected into the crack of specimen. It is then divided into some slices with 4~8mm thick and length of each crack is measured to obtain the crack front in the specimen. It is found that crack fronts can be considered to be straight. Crack length estimated by unloading tangent...

The author used the chevron notched short-rod specimen for fracture toughness test suggested by ISRM in his experiment. The specimen is Kallax gabbro from Sweden with diameter of 71.4mm. Under a certain load level, flourescent penetrant is injected into the crack of specimen. It is then divided into some slices with 4~8mm thick and length of each crack is measured to obtain the crack front in the specimen. It is found that crack fronts can be considered to be straight. Crack length estimated by unloading tangent and secant compliances are approximately equal to the traction-free segment of crack and the measured crack length respectively. The difference between them equals the length of FPZ approximately which is about 10mm.

本实验研究采用国际岩石力学学会建议的V型切口短棒岩石断裂韧度试件,岩石为瑞典的卡莱克思(Kallax)辉长岩,试件直径为71.4mm。把试件加载至不同的载荷水平后,向裂纹注入荧光渗透剂;然后,把试件切成厚度为4~8mm的岩片并测量每一岩片上的裂纹长度,以获得各试件的裂纹前端曲线。结果表明,裂纹前端曲线可以被认为是直线。分析表明,根据卸载切线柔度估计的裂纹长度近似地等于裂纹的无表面力段长度,根据割线柔度估计的裂纹长度等于测量的裂纹长度;两者的差值近似地等于FPZ(Fracture Process Zone)长度,其值约为10mm.

 
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