正应变

同时从工程应变的定义出发，采用Taylor级数展开的方法，建立了单元的五阶近似正应变表达式；

According to the definition of Green strain , the expression of normal strain of element was constituted using the method of expanding Taylor series .

地下结构柱、桩最大正应变呈中间大、两头小分布；

The maximum normal strain of the column of underground structure is big in the middle but is small at both ends .

CdTe层的正应变表现为张应变，主要来源于CdTe和Si的热膨胀系数存在差异，而在从生长温度280℃降至室温20℃的过程产生的热应变。

The strain in CdTe is tensile strain when grown on Si substrates , due to the thermal strain which is originated from the difference in thermal expansion coefficients between epilayers and substrates during cooling from the growth temperature of 280 ℃ to room temperature 20 ℃ .

横向正应变对梁接触问题的影响

Effect of Transversal Normal Strain on Contact Problem of Beam

在双向应力状态下，沿正应变方向更易磁化。

Under biaxial stress state , magnetization is more easily achieved along the direction of positive strain .

显微组织观察发现，变形带和微裂纹的产生是合金正应变率效应受到抑制的主要因素。

The analysis of microstructure showed that the occurrence of deformation band and microcrack are the main inhibitions .

波形钢腹板的纵向正应变值比混凝土顶板、底板小得多，数值上接近于零。

The strain in lengthwise direction of the corrugated steel web is close to zero , much smaller than that of the concrete plate .

与传统压力加工正应变全塑性理论不同，材料在大塑性变形时主要受到的是切应力，产生切应变。

Materials received shear stress and produced shear strain during SPD which was different with the normal strain plastic theory during conventional plastic processes .

建立了电磁检测法检测构件弯曲正应变和剪应变的数学模型，推导出应变与时间域计测值之间的函数关系；

This thesis establishes the mathematical models of measuring angle strain and bending strain , develops the functional relation between the strain and the measuring values .

从力学机制上看，岩石破坏可分为剪切破坏和拉伸破坏两种基本形式，它们各自都有不同的破坏准则，其中最大正应变强度准则是一个应用相对比较简单的岩石破坏准则。

In mechanism , there are two basic forms of rock failure , i.e. , shear failure and tensile failure . Relative to different failure forms , different failure criteria can be set up .

在分析错动带正应变、剪应变变化规律的基础上，建立了对数型经验本构模型，分析了各经验模型参数的规律。

Then suggested rheological parameters of shear zones were obtained . ( 6 ) Based on strain rules of shear zones , a logarithmically experience constitutive model was set up , and then model parameters ' rules were analyzed .

采用六模态的中厚壳理论研究了可压缩流体中球面各向同性球壳的自由振动，即在分析中考虑了剪切变形，旋转惯量和横向正应变的影响。

In this paper , an improved shell theory is employed to analyze the free vibrations of a spherically isotropic spherical shell submerged in a compressible fluid medium . The effects of shear deformation , rotary inertia and transverse normal strain are included .

阐述和证明了正交异性材料主方向的压阻特性：（1）压阻效应只与正应变／正应力有关，而与剪切应变／剪切应力无关；

In this paper three important characteristics in piezoresistance for the orthotropic material are given and proved theoretically : ( 1 ) The piezoresistance on the principal axis of an orthotropic material is independent of shear strains / stresses , but correlated with the normal strains / stresses only ;

正改应变或线应变由每单位长度内的长度改变量来定义。

Normal or linear strain is defined as the change in length per unit length .

而在厚度方向（Z向）450℃达到4.61%的最大正自由热应变，是X&Y向的31倍；

While through the thickness ( Z direction ), at 450 ℃ it reaches the positive maximum free thermal strain of 4.61 % , 31 times bigger than that in X-Y direction ;

任务型组织是专门因应环境的变动性而设立起来的组织形式，具有高度的灵活性和环境适应性的特征。它正是以变应变的方式来获得对环境的即时性反应和较高的效率。

Established according to the environmental alteration , the task-oriented organization is of instant response , high efficiency and flexibility .

认为在混凝土弹性阶段剪应力和纤维正应力受应变影响较小，塑性阶段应变对应力传递影响较大；

It is found that the influence of strain on stress and normal stress in fibre is larger in plastic stage than that in elastic stage .

根据夹层板的正应力、正应变和剪应力、剪应变沿板厚的分布关系，得到夹层板的弯曲、剪切修正系数。

The bending and shear modifying coefficients are derived according to the distribution of the stress and strain of the sandwich plate along the direction of the plate thickness .