查询词典 strain hardening

Laws of cyclic hardening and softening, transformation laws of strain amplitude, plastic amplitude, laws of cyclic creep caused by mean stress under stress control, Masing behavior of material, etc, are examined in detail.

通过不同环境温度下的简单拉伸试验和应力控制下的低周疲劳试验，找出了环境温度对应力控制下的疲劳行为和疲劳强度的影响。

Plane strain, mode I quasi-static steady state crack growth is investigated utilizing the finite element method. It is once again established that TNT plasticity can significantly increase the stress level near the crack tip. The crack tip stress singularity is higher than or equal to the square-root singularity of elastic K field and is also independent of the plastic hardening exponent.

采用有限元方法研究了平面应变Ⅰ型准静态的稳态裂纹扩展，再次证实TNT非局部理论能够显著提高裂纹尖端附近的应力水平；裂尖应力场的奇异性超过或等于弹性K场平方根奇异性，而且与塑性硬化指数无关。

However, in this paper, the author finds two new methods to show the work-hardening coefficient and strain rate sensitivity coefficient by Nano Indenter Ⅱ.

采用纳米力学探针压入法得出了两种新的加工硬化系数的表示方法，并建立了求应变速率敏感系数的方法。

Four-node degenerated shell element and rigid shell element are used in our FEM model.Updated Lagrange formulation and rate form constitutive equation are adopted to solve the problem of large strain and large rotation in sheet forming process.Sheet metal material property is described by plastic anisotropy yielding model and isotropic hardening model.Master surface-slave surface contact model is used to define the contact between tools and blank.Contact constraints are enforced with a kinematic algorithm and friction stress is computed by Coulomb friction law.Dynamic relaxation method is used to treat springback after forming stroke.

四结点蜕化壳单元和刚体壳单元分别用来建立板和模具的有限元模型；更新Lagrange法和速率型本构关系被用来处理板料变形中的大应变和大转动；材料模型采用塑性各向异性屈服与等向强化模型；通过主从面模型定义板料和模具的接触，接触算法采用运动约束法，摩擦力用库仓定律计算；并利用动力松弛法对回弹过程进行了计算。

Analysis by the elastic-plastic finite element model, taking into account the non-linear geometry and Multilinear Isotropic Hardening material mode, adopting the pipe's strain-damage, have a different shape model to limit the impact load and the stress distribution of defects.

分析采用了弹塑性有限元模型，考虑了几何非线性和材料非线性，采用了多线性等效强化模型和管道破坏的应变准则，得到了不同形状模型对极限荷载的影响以及管壁缺陷处的应力分布状态。

In this paper, we use linear elastic and power hardening function to approximately represent the stress-strain curve of material.

将材料的本构关系描述为线弹性幂强化形式，推导出了各杆铰接在一个定轴转动刚体上的平面杆系弹塑性分析的普遍表达式，使问题得到了圆满的解决。

Based on the principle of plastic work equivalent per unit volume, Drucker flow rule and isotropic hardening model, a new expression of stress-strain relationship of biaxial tension for different loading paths, which used firsthand uniaxile tension test data, were derived from existing yield criteria such as Hill48, Hill90, Barlat89, Hosford and Mises yield criteria.

根据单位体积塑性功相等原理，基于Druker公设以及等向强化模型，利用比例加载的特点，推导出板料在无卸载比例加载路径下的双向拉伸本构模型，并给出几种不同屈服准则下的本构模型。

Baosteel Group,through analyzing the plate's texture,metallurgical structure,grain orientation,hardening index,plane plastic strain ratio and cold forming performance with different aluminum content s,influence of aluminum on plate's processing properties has been discussed from the angle of the product's microstructure.

以宝钢梅山公司的SPCC典型钢种为例，通过对不同铝含量板卷织构、金相组织、晶粒取向、硬化指数、平面塑性应变比、冷成型性能试验的分析，从微观结构的角度探讨铝对工艺性能的影响。

The test results shows that the stress-strain curves of the remoulded expansive soil samples were stress-hardening owing to competely damage of the soil construction under different matric suctions and vertical stresses.

试验结果表明，在不同的基质吸力和竖向荷载下，重塑膨胀土试样由于结构性遭到彻底的破坏，应力应变关系表现为应变硬化特性。

The plastic strain component along the normal of loading path is presented to measure the hardening.

其中，材料强化程度采用沿路径法线方向的塑性应变分量描述。

Neither the killing of Mr Zarqawi nor any breakthrough on the political front will stop the insurgency and the fratricidal murders in their tracks.

在对危险的南部地区访问时，他斥责什叶派民兵领导人对中央集权的挑衅行为。

In fact,I've got him on the satellite mobile right now.

实际上 我们已接通卫星可视电话了