微裂纹

基本解释 (translations)

microcrack

与微裂纹相关的网络例句 [注：此内容来源于网络，仅供参考]

Analyses Ⅲ crack creep fracture under the influence of the initial co_linear array of microcracks antiplane using macrocrack_microcrack inteaction model and the theory of stress intensity factors for creep fracture,and presents the relation between the concrete antiplane Ⅲ crack stress intensity factors for creep fracture and the initial stress intensity factors was obtained.

依据宏观裂纹—微裂纹相互作用模型和蠕变断裂应力强度因子理论，对具有初始等距共线微裂纹列影响的反平面Ⅲ型裂纹体的蠕变断裂问题进行了分析。

Based on the foregoing analysis, the critical condition of realizing ductile/brittle transform is confirmed, and then, the model of ductile grinding of engineering ceramic is built.

以陶瓷材料压痕断裂力学、线性断裂力学和微观断裂物理学为理论基础，系统的分析和讨论了磨削加工过程中微裂纹的产生机理及其影响因素，建立了裂纹分布模型，并根据位错产生微裂纹机制，对磨削过程微裂纹的形成采用位错塞积模型来描述，从能量平衡的角度，讨论位错裂纹的稳定性与磨削应力的关系，确定了材料脆性去除和塑性去除转换的临界条件，最终建立以此为基础的工程陶瓷材料延性域去除模型。

Theobserved strain is 10~2 times as local point strain at the same observed stress.This indicates that macroscopical symmetrical rock is quasi-brittle materialwith microcosmic heterogeneousness and its macroscopical mechanicalbehavior is the results of reciprocity and magnification between microcosmiccharacteristic, not simple sum.(4) The degree of irregularity of strain increases with the number of cycle.But degree of irregularity of transverse strain fluctuates larger at the samecycle. Moreover degree of irregularity of transverse strain is larger than that ofaxial strain. This shows that deformation and failure of rock is process ofevolvement of small crack. Small crack evolves from even and out-of-orderstatus to heterogeneous and ordinal status.(5) Ultrasonic speed decreases with the number of cycle. The decreasecourse is such: Firstly, ultrasonic speed fluctuates in a steady scope in somecycles; And then ultrasonic speed quickly decreases to a certain more smallvalue; Afterwards in succedent cycles, ultrasonic speed fluctuates about thevalue. That is to say, ultrasonic speed fluctuates and decreases at intervals ofcycles. In deformation process of rock, quantitative change and qualitativechange of its small crack evolvement carry through crosswise.(6) Strength and modulus of rock decrease with exponential function asscale of specimens increases.

同一表观应力下，局部点应变与表观应变相差可达2个数量级，表明宏观上均匀的岩石是具有细观特征的准脆性材料，其宏观力学行为是细观特征相互作用、放大的综合结果，而不是简单的叠加；(4)岩样轴向应变不均匀程度和横向应变不均匀程度随循环次数的增加渐进增大，但是在同一个循环内，横向应变离散系数随应力的变化波动较大，且同一循环级别下，横向应变不均匀程度大于轴向应变不均匀程度，表明岩石内部微裂纹的演化是岩石变形破坏的本质特征，这一演化表现为微裂纹从均匀无序分布逐渐向非均匀有序发展；(5)随循环次数的增加，所有岩样内部超声波速会出现衰减，衰减过程表现为在某几次循环内超声波速在某一相对范围内波动，然后急剧减小到某一较小值，在随后的循环内，超声波速又会保持在这一较小值附近波动，即超声波速表现为波动和急剧减小间隔形式衰减，表明从宏观看来平稳的岩石变形过程，内部结构演化过程(微裂纹发展及其相互作用)却表现为均匀量变和突发质变不断交叉进行的现象；(6)岩石强度和弹性模量随尺度增大呈指数函数规律减小。

The micro mechanism considers that the inclusion in material, called micro defect crack, is the nucleus of internal crack initiation, interaction, between the stress field of the micro defect crack tip as loading and strain field of crystal lattice caused by crystal point passim (as vacancies or interstitial atom, H, O, N et al), will trap the point passim, and cause the enrichment of point passim around the micro defect crack.

其中疲劳裂纹内部萌生的核心是材料中的第二相粒子、夹杂物或微空洞，称为微裂纹；而微裂纹的长大是材料中间歇原子或空位等点缺陷在微裂纹尖端富集沉淀的过程，微裂纹的长大速率受到点缺陷富集扩散速率和疲劳载荷的双重影响。

For both the collinear and wavy microcracks configurations, the critical linkage dominated fracture becomes less probable as the standard deviation of ligament size increases.

对于共线微裂纹和波折微裂纹构型，临界串接主导破坏概率均随着韧带尺寸标准方差的增加，即随着微裂纹随机分布不均匀性的增加而减小。

With the use of the dislocation method of complex potential function, this paper studies the interaction between the interface macrocrack and the interface or beneath-interface microcracks by the construction and numerical solution of singular integral equations .

采用复势函数的位错解方法，通过对奇异积分方程的建立和数值求解，研究了界面主裂纹同界面及基体微裂纹之间的干涉。结果表明远场载荷角ψ同Dunder's参数α对界面微裂纹及基体中水平微裂纹同主裂纹干涉的影响都很显著，而ψ对屏蔽区的影响则远小于α对其的影

The microfracturing process of Jinping marble specimen in Sichuan province under uniaxial compression is recorded by using the testing scheme. Quantitatively investigated the propagation and coalescent of cracks at meso-scale with digital technology, the basic geometric information of rock microcracks such as area, angle, length, width, perimeter, are obtained from binary images after segmentation. The failure mechanism of specimen under uniaxial compression with the quantitative information is studied from macro/micro scopic perspective. The result shows that during the damage of the specimen the distribution of microcracks in the whole specimen are still subjected to exponential distribution with some microcracks concentrated in certain regions.

应用于四川锦屏大理岩预制裂纹试样中进行单轴压缩破坏全程的数字化试验，对微裂纹的萌生、生长及贯通过程进行数字化定量分析，得到试样在受荷过程中微裂纹的面积、方位角、长度、宽度和周长基本几何数据，从宏细观角度描述了岩石试样单轴压缩过程中的破坏机制，并分析得出试样单轴受压破坏过程中虽然微裂纹在某些区域集中，但在整个试样中微裂纹的统计分布依然是服从某一指数分布的这一结论。

The damage and failure modes of brittle materials under tension and compression are different. The self-similar growth of open microcracks under tension, the frictional sliding, mode-n self-similar growth and kinking of closed microcracks under compression and their influences on the mechanical properties of materials are studied in detail.

在拉伸和压缩情况下微裂纹损伤机制和材料破坏模式都不相同，本文对张开微裂纹的自相似扩展和闭合微裂纹的摩擦滑移、自相似扩展、弯折扩展进行了详细的研究，分别给出了它们对材料的宏观力学性质的影响。

Crack sliding induced microcrack surface normal dilation and normal dilation induced microcrack further self-similar propagation are considered, the ineracting of sliding and propagation is clarified. The fourth-order tangent homogeneous stiffness tensor of shear microcrack is deduced, and at last the constitutive model of low porosity is expressed in increment formulation though unit sphere surface integral.

3在评述当前常用的微裂纹滑移准则的基础上，提出了本文的滑移准则，考虑了微裂纹滑移引起的裂纹面法向膨胀，以及由法向膨胀引起的微裂纹进一步扩展，阐明了滑移-扩展相互影响的细观力学机制。

The results show that: when the stress triaxiality is low, the penny-shaped crack can lead to damage anistropy of a ductile material; and the variance of Lodes parameter will lead to the variance of the expanding rate and deformed shape of penny-shaped crack and sphere-shaped void.

进而对材料中同时含有币形微裂纹和球形微孔洞的情形作了数值模拟分析。计算结果表明：币形微裂纹的存在将导致低应力三轴度下韧性材料破坏的细观损伤呈现明显的各向异性；而Lode参数对微裂纹和微孔洞的长大和变形状态具有较大的影响。

与微裂纹相关的网络解释 [注：此内容来源于网络，仅供参考]

Hairlike crack：发丝状裂纹,微缝

Hair grease 毛填料润滑脂 | Hairlike crack 发丝状裂纹,微缝 | Hairline crack 微缝,细裂缝,发裂

microcoulomb：微庫倫

microcoulomb 微库 | microcoulomb 微库伦 | microcrack 微裂纹

microcrack：微裂纹

Myers[6]用四环素荧光标志研究骨质疏松相关骨折的微观特征,在电子显微镜下观察到局限性和弥漫性荧光,已知局限性荧光与骨小梁的显微裂纹(microcrack)有关,推测弥漫性荧光可能与骨小梁的超显微裂纹有关.

surface microcrack：表面微裂纹

应力强度因子:crack-tip fracture model | 表面微裂纹:surface microcrack | 多时区模型:multiple time zone model

Griffith microcrack model：格里菲斯微裂纹模型

Griffith method 格里菲斯方法 | Griffith microcrack model 格里菲斯微裂纹模型 | Griffith's white 立德粉

micromillimeter：微毫米、纳米

metrical system公制、米制 | micromillimeter微毫米、纳米 | micro-flaw微裂纹、发裂

crizzle：表面微裂纹

crivetz克里维茨风 | crizzle表面微裂纹 | crizzling表面缺陷

fissural cyst of jaw：下颌裂囊肿

fissura transversa cerebri 大脑横裂 | fissural cyst of jaw 下颌裂囊肿 | fissure 微裂纹,裂,裂缝,裂缝,裂痕,裂纹,裂隙

chittering：微裂纹陶瓷器底部边缘

chitose 壳糖 | chittering 微裂纹陶瓷器底部边缘 | chitterlings 猪等的小肠

microdensitometer：微密度计

microcrystalline structure 微晶结构 | microdensitometer 微密度计 | microfissure 微观裂纹