塑性应变

在材料织构定量分析的基础上，由织构级数展开系数计算金属板材的成型性参数，如塑性应变比R值与泰勒因子M等。

Based on the development of the Quantitative Texture Analysis ( QTA ) of materials , the calculation of formability parameters such as plastic strain ratio R and the Taylor factor M of sheet metals from series expansion Coefficients of texture have been studied .

当浸渗温度不超过1173K时，延长浸渗时间复合材料塑性应变呈现增大的趋势。

Plastic strain of the composites presented increasing trend for the prolongation of infiltration time when infiltration temperature did not exceed 1173K .

塑性应变比r值的测定和应用

Measurement and application of plastic strain ratio r - values

试样尺寸对钢板塑性应变比r的影响

Effect of Specimen Size on the Plastic Strain Ratio r of steel plate

冲压钢板塑性应变比r值的在线检测技术

On-Line r Value Determination of Deep Drawing Steel Sheet

金属薄板塑性应变比r值异常值的处理

Treatment of Abnormal Value of Plastic Strain Ratio r Value about Metal Thin Steel Plate

金属塑性应变比r值测定方法误差分析

Error analysis on the determination method for the plastic strain ratio R value of metallic materials

电场退火对IF深冲钢板塑性应变比（r值）的影响

Effects of electric field annealing on plastic strain ratio ( r value ) of if deep drawing steel sheet

塑性应变比r值已作为评价汽车专用薄板成形性的一个重要参数。

Plastic strain ratio r-values has been applied as one important parameter to describe the forming property of sheet specifically used for Automobile .

采用DEFORMABLETORIGIDAUTOMATIC关键字控制爆破缺口的形成，用塑性应变控制材料失效。

The keyword of DEFORMABLE_TO_RIGID_AUTOMATIC was used to control the form of blasting cuts , material fail was controlled with plasticity strain .

Rice早期定义的非共轴塑性应变率是基于二维共轴应力空间得到的，由于忽略第三应力不变量的影响，在多维应力空间并不能保证其非共轴性。

Rice , is only built on the basis of 2D coaxial stress space but invalid in multi-dimensional stress space since the effect of the third stress invariant on non-coaxiality is ignored .

借助两种不同的方法，测定了冷轧薄板的应变硬化指数（n）、塑性应变比（r）值和伸长率。

The strain hardening exponent ( n ), plastic strain ratio value ( r ) and elongation of the cold rolled thin shect have been measured by two different methods .

特别是在C区和E区，黏土的应力路径模型可计算塑性应变，而修正剑桥模型的塑性应变为0。

Specially , in the area C and E , the clay stress path constitutive model can compute plastic strain which will be zero if the modified Cam-clay model is used .

然后对于双线性应力-应变关系的材料，把塑性应变作为等效荷载，进而化成挠度w的表达式。

For materials with bilinear stress-strain relations ( See Fig. 2 ), plastic strains expressed in terms of the deflection w will be treated as transverse equivalent loads .

其方法是采用以塑性应变幅同弹性应变幅之比值Δεp/Δεe作为应力应变参量，以常用的材料常数作为材料参数。

The method is to adopt the ratio of plastic strain range to elastic strain range as the stress-strain parameter , using the staple material constants as the material parameters in damage calculating expression .

利用所测量的铝板织构和Sachs以及反应应力模型对铝板不同方向塑性应变比进行了模拟计算。

The r values in different sheet directions were calculated based on Sachs model and Reaction stress model in consideration of the measured textures .

最后，以ANSYS软件为平台对弹丸减速运动中的塑性应变进行分析，证明了改进后减速装置的可靠性。

Finally , by using ANSYS software , plastic deformation of the bill in the decelerated motion has been analyzed , and the reliability of the improved designed reduction gear has been proved .

本文利用弹塑性应变理论及QR法提出了一个分析高层建筑结构弹塑性问题的新方法。

In this paper , a new method for elastoplastic analysis of tall building structures is presented by use of the elastoplastic strain theory and QR-method .

随着垫板散热能力的降低，带热沉TIG焊缩小纵向残余塑性应变区的能力增强；

With the deterioration of heat emission capacity of the backing , the capability of narrowing the zone existing longitudinal residual plastic strain was strengthened by using strip heat sink TIG welding .

提出一种新的考虑热应变、蠕变应变和塑性应变，反映界面脱层的Voronoi单元，并将其引入颗粒增强复合材料的力学性能模拟中。

A Voronoi cell element , formulated with creep , thermal and plastic strain , and interfacial crack , is proposed for the simulation of thermo-mechanical fatigue behavior of particulate reinforced composites .

用塑性应变准则建立了油井出砂预测的有限元力学模型，岩石的屈服应力准则用Drucker-Prager准则，在国内是油井出砂预测的一种新方法。

FEM Model of sand production in oil well was established with plastic strain criteria , the yield stress criteria of the rock is the Drucker-Prager criteria .

材料在使用过程中塑性应变被不断地颠倒，这是IRP发展中涉及到连续油管的部分困难之一。

Part of the difficulty with developing the IRP with respect to CT is that the material is used in such a way that continually subjects it to plastic-strain reversals .

在p-q主空间中，同时考虑主应力值大小变化和应力Lode角θσ的变化以及主应力轴旋转的影响，推导出岩土材料的应力增量与塑性应变增量的关系；

In p-q space , considering the values of principal stress changes and the rotation of principal stress axes , the relation between plastic strain increment and stress increment is derived .

讨论了非Massing材料滞后环的数学描述并以此为基础直接得到了循环塑性应变能的表达式，其结果与Ellyin等相一致。

Based on this description , the expression of cyclic plastic strain energy is directly obtained and the results are in agreement with those given by Fllyin ( 1984 ) .

本文从塑性应变Lode参数着手深入研究了应变Lode参数即中间主应变与各应变参量间的内在联系，给出了相应数学表达式。

Tarting with Lode parameter of plastic strain , this paper has studied inherent relate of Lode parameter of strain ( second main strain ) and each strain parameter in depth , gived appropriate mathematics expression .

结果表明，Sn-Ag-Cu无铅钎料焊点的抗剪力明显大于Sn-Pb钎料焊点的抗剪力，但是两种焊点的剪切力变化曲线相似，表明焊点在剪切失效前都有明显的塑性应变过程。

The results indicate that shear strength of the joints soldered with Sn-Ag-Cu is greater than that with Sn-Pb , but the shear curves of two kinds of joints obviously show that plastic strain appear before joints crack .

通过拉伸实验研究了电场退火（850℃，25min）对IF深冲钢板塑性应变比（r值）的影响.结果表明，电场退火提高了IF深冲钢板的平均塑性应变比（（？）

Effects of electric field annealing on plastic strain ratio ( r value ) of IF ( interstitial free ) deep drawing steel sheet were studied by mean of tensile test . The results show that electric field annealing improved the average plastic strain ratio ((?)

当应变幅较低时，合金的塑性应变能较小但变化较大，特别是塑性较好的E10和M10合金；

But at low strain amplitude , its values are less and the change with cycle number is acute , especially for the alloys with low titanium content and low yield strength such as E10 and M10 alloys .

本文比较了各种可能揭示钢中空穴的方法，采用一系列具有增量塑性应变的光滑拉伸试棒调查C-Mn结构钢空穴的形核。

Various methods which might be used to reveal the voids in the steel were compared . Using a series of the interrupted smooth tensile specimens with an incremental plastic strain , the void nucleation was investigated in a C-Mn structural steel with lower sulphur content .

实验结果表明，在Cr5支承辊用钢马氏体相变结束时，相变塑性应变与应力成线性关系，Greenwood-Johnson模型中的相变塑性参数是与应力无关的常数。

Experimental results show that a linear relationship between transformation plasticity strain and applied stress exists when martensitic transformation completes in the 5 % Cr steel , and the transformation plasticity parameter of the Greenwood-Johnson model is a constant , which is independent of applied stresses .