shear band

The failure of rock under triaxial compression is due to the localization of narrow shear band.

常规三轴压缩过程,岩石试件破坏常常是以狭窄剪切带形式存在的局部化变形为先导.

Higher DA results in higher values of shear strain and volumetric strain in shear band.

扩容角越大,剪切带最终可以获得越来越高的剪切应变和体积应变.

Based on gradient-dependent plasticity where an internal length parameter is included to consider the microstructural effect, the distributions of shear deformation, shear strain and temperature in adiabatic shear band were derived considering the slow and sharp decrease of load-carrying capacity beyond the peak shear stress.

采用梯度塑性理论，考虑了峰值剪切应力之后的材料承载能力缓慢降低的过程及承载能力快速降低的过程，推导了剪切带内部的剪切变形、应变及温度分布的公式。

The Role and Microstructure of Adiabatic Shear Band on a Steel Tube Ballistically Loaded by Explosive

钢管爆炸条件下绝热剪切带的作用和精细结构

The toughening mechanism was found to be shear band.

EPDM对PP增韧机理遵从银纹-剪切带机理.

The axial and lateral plastic strains are concerned with the compressive stress level, the inclination angle and the thickness of shear band, the softening modulus, and the geometrical size of rock specimen.

试样的轴向塑性应变及侧向塑性轴向应变由梯度塑性理论确定，它们与应力水平、剪切带倾角及宽度、软化模量及试样的尺寸有关。

An analysis of size effect of the inclination angle of shear band and the onset, skip and stability of shear strain localization

剪切带倾角尺度律与局部化启动跳跃稳定研究

Research on the computational simulation of adiabatic shear band damage and fracture

绝热剪切损伤和破坏的数值模拟研究

Larger loading rate leads to larger inclination angle of shear band in the middle of specimen.

随着加载速率的增加，岩石中部剪切带的倾角有增大的趋势。

Some issues caused by high pressure and plastic shear action at explosive welding interfaces have not been a unified theoretical explanation by now. Such as interface wave formation mechanism, combining mechanism, the evolution of adiabatic shear band, et al.

目前，爆炸焊接界面上由高压塑性剪切作用引起的一些问题尚无统一的理论解释，例如：界面波的成波机理、爆炸焊接结合机理、以及绝热剪切带的衍生发展过程等等。

A constitutive relation between flow shear stress rate and the relative sliding velocity of shear band is also obtained.

推导了剪应力（率）与剪切带相对错距（速度）的本构关系。

Bigger inclination angle of shear band leads to bigger dissipated energy of lateral plastic deformation and smaller dissipated energy of lateral plastic deformation.

增加剪切带倾角，侧向塑性变形消耗的能量占剪切带消耗的能量的比例增加。

Shear band in overaged al-2. 45wt% cu alloy polycrystal

铝铜合金过时效多晶体中的剪切带

The results show that the temperature of shear band increases with the increase of the average strain rate(γ_0).

结果表明，随着平均应变速率的增加，剪切带中的温度逐渐增高。

Whether shear instability occurs or not, some parameters, such the length of specimen, shear elastic modulus, shear softening modulus, internal length parameter ( or the width of shear band) and the inclination angle of shear band, play important roles.

岩样系统是否将发生剪切失稳破坏，关键取决于：岩样高度、剪切弹性模量、剪切降模量、岩石材料内部长度参数及剪切带倾角。

It has been confirmed that sufficient structural strength is one of the conditions for the formation of shear band for structured clay. Inclination angle of the shear band is not in accordance with Roscoe ′ s theory.

结果表明：土体具有足够的结构强度是剪切带形成的条件之一，剪切带的倾角与Roscoe理论不相符；

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。

The increase of the inclination angle of shear band and its width has an opposite influence on stress-strain curve of specimen after localization occurs.

剪切带倾角和宽度的增加对岩样的塑性性质影响正相反。

Based upon the gradient-dependent plasticity, a model of size effect of the inclination angle of the shear band was put forward. The theoretical result compares well with experimental results.

建立了准脆性材料试件剪切带倾角尺度效应模型，得到了剪切带倾角尺度效应的解析解，且与实验结果比较相符。

The prediction values of shear strain and temperature in shear band based on gradient-dependent plasticity are higher than those by use of classical elastoplastic theory.

由于微结构效应，基于梯度塑性理论的剪切带内部的最大塑性剪切应变及最高温度的预测值高于经典理论的预测值。

The finite deformation theory and the Nakai's sub-loading constitutive model are used to investigate shear band localization in plane strain model tests.

基于有限变形理论和中井的下负荷面本构关系模型，研究了平面应变试验中黏土试样变形的局部化问题。

The internal flaw has the same important effect on the distribution of the shear band, but little effect on the rock UCS.

岩石内部的单个缺陷对剪切破坏面的分布影响较大，而对岩石强度却影响较小。

Larger inclination angle of shear band is caused by larger rigidity of platen.

压头刚性越大，剪切带倾角增加，试件脆性增强。

the results of the numerical solution show that the overall behaviour of the material and the critical strain of the shear band bifurcation point are closely related to the size of the voids and the parameter a of controlled loading.

计算结果表明，宏观材料的软化、塑性可膨胀性、内部损伤的发展以及剪切分叉的临界应变值等，都与加载参数α、原始空洞尺度有着密切的关系。

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。

Dissipated energy due to axial plastic deformation is proportional to that of lateral plastic deformation and the proportional coefficient is dependent on inclination angle of shear band.

轴向塑性变形消耗的能量与侧向塑性变形消耗的能量成正比，其比例系数与剪切带倾角有关；

It explains that Cu tends to be the most reluctant to form an adiabatic shear band, while 0.06C steel forms the band most readily among the three metals.

由此可见，这三种金属中Cu最难形成绝热剪切带，Al次之，0.06C钢最易形成绝热剪切带。