采用有限元计算编码abaqus模拟了钨合金圆台试件在冲击载荷下的变形和剪切局部化行为。
The deformation behavior and shear localization in truncated conic specimens of tungsten heavy alloys under impact loading are simulated by the finite element code ABAQUS.
锯齿形切屑产生的原因是第一变形区内因热软化超过应变和应变率强化而发生了绝热剪切局部化。
The reason for the sawtooth chips is that the adiabatic shear localization occurs in the primary deformation zones when thermal softening exceeds strain and strain rate hardening.
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。
The failure of rock under triaxial compression is due to the localization of narrow shear band.
剪切应变率（或应变）局部化区域与体积应变率（或应变）的位置重合，局部化区域就是岩样最终的破坏位置。
The location of shear strain rate localization coincides in position with the location of volumetric strain rate, which is the actual failure zone of rock.
这可能是由于它们产生剪切形变局部化的滑移面硬化率对瞬时拉伸应力的临界比值不同之故。
Presumably, it is due to their different critical values of the ratio of slip plane hardening rate to current tensile stress for shear localization.
这可能是由于在不同状态时产生剪切形变局部化的滑移面硬化率对瞬时拉应力的临界比值不同之故。
Presumably it is due to their different critical values of the ratio of slip plane hardening rate to current tensile stress for shear localization.
介绍高孔隙度岩石局部化变形条带中压缩条带、剪切条带和膨胀条带的野外和实验研究的进展。
Field and experimental results of localized deformation bands in high porosity rocks such as compaction bands, shear bands and dilation bands are introduced.
近几年在野外和实验室都发现高孔隙岩石中局部化变形的压缩带、剪切带和膨胀带，是目前岩石力学、岩石物理和本构模型研究的热点之一。
Recently, localized planar zones of deformation have been discovered in high-porosity rock, which are called compaction bands, shear bands and dilation bands.
结果表明，剪胀后的孔隙度、孔隙比、孔隙度增量、孔隙比增量、孔隙度变化率及孔隙比变化率均具有局部化特征，在剪切带中部其值最大。
The analytical results show that porosity, void ratio, increment of porosity, increment of void ratio, rate of porosity and rate of void ratio are non-homogeneous in shear band.
基于梯度塑性理论，研究了应变软化阶段的刚度劣化对剪切带内部的局部应变及相对剪切位移的影响。
Distributed shear strain and displacement in localized shear band were investigated considering degraded stiffness in the strain-softening process based on gradient-dependent plasticity.
在平面应变压缩条件下，砂土在峰值应力状态附近出现应变局部化现象，在残余状态最终形成一条V型剪切带。
Under plane strain condition, the strain localization starts around the peak stress state; and a V-shaped shear band is formed at the residual stress state.
考虑扩容效应后，剪切带的倾角和宽度均增加，剪应变率的局部化程度降低。
The inclination Angle of shear band and its width increase as dilatation Angle is increased. The extent of localized deformation decreases as dilatation effect is considered.
[2] 谭成文， 王富耻，李树奎。绝热剪切变形局部化研究进展及发展趋势[J]。 兵器材料科学与工程 ， 2003，26 （5） ： 62–67。
TAN C W, WANG F C, LI S K. Progresses and trends in researches on adiabatic shear deformation[J]. Ordnance Metal Science and Engineering , 2003, 26 (5) : 62–67.
高孔隙岩石的三种局部化变形方式：压缩带、剪切带和膨胀带是常见的三种在野外已经找到证据的变形方式。
Recently, localized planar zones of deformation have been discovered in high-porosity rock, which are called compaction bands, shear bands and dilation bands.
应用应变梯度塑性理论对局部化剪切带内部(塑性)剪应变(率)规律进行了理论分析。
A theoretical analysis of localized strain and strain rate in shear band after localization occurs beyond the peak shear stress is carried out based on the strain gradient plasticity theory.
这种由软化特性引起的应变局部化剪切带是砂土材料非常重要的变形和强度特性之一。
The strain localization on a shear band induced by post-peak softening is one of the most important deformations and strength characteristics of sand.
首先，由于在应变软化阶段的峰值强度的剪切应变局部化启动的纵向和横向的塑性变形引起的耗散能进行了分析。
Firstly, dissipated energies induced by axial and lateral plastic deformations due to shear strain localization initiated at peak strength in strain softening stage is analyzed.
首先，由于在应变软化阶段的峰值强度的剪切应变局部化启动的纵向和横向的塑性变形引起的耗散能进行了分析。
Firstly, dissipated energies induced by axial and lateral plastic deformations due to shear strain localization initiated at peak strength in strain softening stage is analyzed.
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