剪切变形

The results show that a difficult-sheared region exists in the vicinity of the inner corner of the die channel; a dead zone at the outer corner of the die channel and obvious uniform shear deformation at the middle region of sample during ECAE processing are formed. The less-sheared regions caused by friction resistance are observed at lower and top parts, which are symmetric and gradually extend to the inner part along the sample longness. The less-sheared region percentage increases with ECAE processing.

结果表明：挤压过程中试样在模具通道内角点附近形成难变形区；在模具通道外角点形成变形死区；试样的芯部变形比较均匀，为明显的剪切变形；受摩擦阻力的影响，试样顶部和底部均出现了滞变区，该区域呈轴对称分布且沿试样长度方向逐渐向试样芯部扩展；滞变区比例随挤压的进行而增大。

The same set of ductile-rheologic shear deformational augen granite samples in the Yunkai uplifted area are measured by whole-rock Sm-Nd, Rb-Sr isotopic dating system method, obtaining respectively 1414±68Ma for Sm-Nd isochron age and 490±36Ma for Rb-Sr isochron age. These ages are respectively interpreted as the time of the granitic rock formation and the time of the tectono-thermal event of ductile-rheologic shear partial melting in Caledonian, indicating that the orogeny not only took place in Caledonian, but also the more important tectono-magmatic orogeny in the late Mesoproterozic Era and can be compared with the time of global Grenville orogeny.

对云开核部韧性-流变剪切变形眼球状花岗岩石样品进行了全岩Sm-Nd、Rb-Sr同位素年龄测定，获得1414±68Ma的Sm-Nd等时线和490±36Ma的Rb-Sr等时线年龄，它们分别代表这套花岗岩的形成时代和加里东期韧性-流变剪切部分熔融构造热事件发生时间，表明云开地区不仅在加里东期发生造山运动，而且在中元古晚期发生了更为重要的构造—岩浆造山运动，其时代与全球性的格林威尔造山运动时间可以对比。

In the study of defect problems in elastic media, first, the uniform stress fields within a three-phase anisotropic elliptic inclusion in anti-plane shear is discussed; second, an exact solution is given for an edge dislocation in a three-phase composite cylinder model with a sliding interface; finally, an analytic solution is derived for two circular inclusions with circumferentially inhomogeneously imperfect interfaces interacting with a circular Eshelby inclusion in anti-plane shear.

在对弹性介质缺陷体问题的讨论中，我们首先探讨了面外剪切变形下各向异性三相椭圆夹杂中均匀应力场；其次研究了具有滑动界面的三相圆柱复合模型中的刃型位错问题；最后分析了面外剪切下具有环向非均匀界面的两个圆柱异相夹杂与一个圆柱Eshelby夹杂的相互作用问题。

The mantle shear zone played an important role in continental blackup. Especially, the dissymmetry caused by simple shear deformation resulted in the different amount of extension in upcrust and subcrust, which in turn formed the detachment of the upper mantle from the crust, that is, the thinning positions of upper mantle and crust were different.

地幔剪切带在大陆裂解过程中起关键性作用，特别是简单剪切变形所产生的强烈不对称构造，以至壳上伸展量明显不同于壳下伸展量，壳幔明显折离，使得壳幔变薄区的位置明显分离，这将能很好地解释华北地台东部岩石圈地幔演化及其浅部盆地形成等的响应。

Based on the geological background , ore?deposit and structural geology, the paper analyzed the geological character istics and metallogenic mechanism of the gold deposit and suggests that the deposit occurring in the limestone and metamorphic siliceous rocks in the third litholog ic unit of Devonian Tuokesalei formation is controlled by the Duolanasayi shear zone characteristic of secondary shear deformation, mineralizaion and multiphased vei n mineralization?.

笔者从地质背景、矿床地质，以及控矿构造分析了多拉纳萨依金矿矿床特征及其成矿机理；明确了矿床产于泥盆系托克萨雷组第三岩性段的灰岩－浅变质－硅质岩系，受控于多拉纳萨依韧性剪切带；控矿构造具有二次韧性剪切变形、矿化和多期次脉体矿化的特征，显示出构造活动的多期次性与复杂性，阐明了构造期次与矿化之间的关系。？

Study shows that the E-W-trending steep foliation belt is one of the major structural patterns, which is well-preserved in the complex. The large-scaled ETSFB is characterized by well-developed E-W-trending steep-dipping foliations and sub-vertical folds, suggesting pure shearing under the condition of crust contraction.

近年来的研究发现，近东西向陡倾叶理带是该区高级变质杂岩中保存完好的一种主要构造形式，规模巨大，以密集的近东西向陡倾叶理和直立褶皱的发育为特征，反映了地壳挤压收缩环境下的纯剪切变形，其上叠加了深构相右行走滑剪切带。

A postbuckling analysis is presented for a shear deformable laminated cylindrical panel of finite length subjected to lateral pressure.

基于Reddy高阶剪切变形理论的Karmam-Donnell型非线性壳体方程，给出复合材料层合剪切圆柱曲板在侧压作用下的后屈曲分析。

The results show that when the shearing force is small, this model in the paper can be used well to study the relationship between the force acting on the brim of the pillar and the displacement of the top pillar.

算例结果验证了对于剪切变形较小的情况，考虑剪切的杆模型在反映杆端力和位移关系方面是正确的，描述反复加载条件下的杆本构关系是可行的。

A stress-strain diagram can be plotted using shear stress and shear strain.

应力-应变图可以用来表现剪切应力与剪切变形。

Defining a Tapered Beam）.The beam elements are based on Timoshenko beam theory, which is a first

单元基于铁木辛哥梁理论，这个理论是一阶剪切变形理论；横向剪切应力在横截

However, as the name（read－only memory）implies, CD disks cannot be written onorchanged in any way.

然而，正如其名字所指出的那样，CD盘不能写，也不能用任何方式改变其内容。

Galvanizes steel pallet is mainly export which suits standard packing of European Union, the North America. galvanizes steel pallet is suitable to heavy rack. Pallet surface can design plate type, corrugated and the gap form, satisfies the different requirements.

镀锌钢托盘多用于出口，替代木托盘，免薰蒸，符合欧盟、北美各国对出口货物包装材料的法令要求；喷涂钢托盘适用于重载上货架之用，托盘表面根据需要制作成平板状、波纹状及间隔形式，满足不同的使用要求。