shear fracture

Discussion on form of rock compression and shear fracture nucleus of earth's crust

地壳岩石压剪断裂核形态探讨

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Five types of fracture assemblage were summarized from the siltstone of the Tertiary Shahejie Formation in the southern North China basin, i. e., ( 1) conjugated shear fracture belts arranged in en echelon N-S-striking tension fracture;

以南华北盆地户部寨第三系沙河阶组粉砂岩低渗透储层为例，总结了其中发育的5种类型构造裂缝组合，即：①南北向雁形张节理组成的共轭剪节理带；

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The main stage barite mineralization was after fracture silication, later was superimposed with tenacity-brittle shear fracture.

主期重晶石矿化在断裂硅化作用之后，其后有韧&脆性剪切带构造的叠加改造。

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A non-linear fracture constitutive model is introduced to take into account the non-linear normal stress and deformation relationship, tangential shear slip and dilation effects.

为合理反映裂隙的非线性变形特性，引入了同时考虑非线性法向应力变形关系、剪切滑动和剪胀效应的裂隙本构模型。

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If the hydrogen blistering is large enough, the shear crack will initiate at early growing stage of shear band, resulting in brittle fracture under low stress.

如存在较大的氢鼓泡，则当剪切带尚未充分发展时微裂纹就形核，导致低应力脆断。

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The deformation mechanism of right bank slope are mainly progressive collapse; collapse instability control by basalt layered structure, conjugate shear fracture, unloading cracks and columnar joints and other structural surface. 3.

右岸岸坡变形破坏模式的主要是渐进性的局部崩塌；崩塌失稳受到玄武岩层状构造、共轭剪切断裂、卸荷裂隙及柱状节理等多种结构面的协同约束作用。

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The results show that the tension fracture condition as well as the shear stress generating shear rupture should exist in inducing seismic faults.

诱发地震的断层，既要有引起剪切破裂的一定剪应力存在，又要具备张破裂的条件。

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From the point of view of fracture mechanics, we studied the far displacement field produced by a disk-shaped pure shear fracture and obtained an analytic expression for that field.

作者从断裂力学观点研究了圆盘形纯剪切破裂产生的远场位移，导出了远场位移的解析表达式。

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The effect of size of crack on energy of shear fracture

裂缝尺度对剪切破裂能的影响

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They are controlled by shear fracture belt of epimetamorphic rock series of Precambrian Period.

主要赋存于前寒武纪浅变质岩系中,受剪切断裂带控制.

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The principal shear fracture plane of rock under compression shear state is to propagate along the upper boundary of the fracture zone.

岩石压剪主剪断面沿该破裂区上部边界扩展。

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The analysis of fracture failure for loom barrel arbor was explored with macroanalysis, microanalysis and metallographic inspection method. The result indicates that barrel ardor fracture is belong to fragile shear fracture without any obvious fracture portent, fracture may be caused by moment impact overloading.

通过宏观和微观的断口形貌观察和金相分析，对织机卷筒轴断裂失效原因进行了分析，认为卷筒轴断裂属于无明显断裂前兆的脆性剪切断裂，断裂有可能由瞬时冲击过载引起。

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For inner shear ( II) type crack, created-fracture angle is-70.5 ° according to maximum tension theory, but the angle has nothing to do with material nature.

按照最大拉应力理论，内剪切型裂缝的开裂角与材料性质无关（-70.5°）；

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Finally, some problems needed for further study are put forward, including the regularity of fissure deformation and fracture under shear loads, the influences of shear loads on fissure permeability under different normal loads, constitutive relationship of fissured rock mass, etc.

指出了需要进一步研究的问题：剪切荷载作用下裂隙变形和破坏规律；不同法向荷载作用下剪切荷载对裂隙渗透性的影响；

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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.

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。

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The formation, distribution and scale of gold lode zone, ore field, deposits and ore bodies are controlled by the shear fracture zone consisting of nearly N S thrust and NE tension fault.

矿带、矿田、矿床及矿体的形成、分布及其规模，受不同级别的近南北向逆冲断裂，及其间派生的北东向张性扩容断裂组成的剪切断裂带控制。

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Rock Compression Shear Fracture Inference of the Earth's Crust

地壳岩石压剪断裂端倪

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The process of slip and fracture, especially shear deformation localization, is studied in underaged aluminum-copper polycrystals by in-situ tensile SEM observation.

采用原位拉伸SEM观察，对欠时效铝铜多晶体组织中的滑移和断裂过程，特别是剪切变形局部化，进行了研究。

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When the heat temperature under 900 C, tough looks can be observed in the rapture of the shear sample, and the main rapture mechanisms contain plastic rapture and decode fracture, and brittle rapture.

加工温度低于900℃时，拉剪试样的断口上可以看到韧窝状形貌，主要的断裂机制是韧西安建筑科技大学硕士研究生论文性断裂和解理断裂以及沿晶断裂。

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