应变硬化

The influential soil constitutive models involving principal stress axes rotation, such as Matsuoka's model, kinematic hardening model, bounding surface model and the complete stress incremen...

对当前较有影响的含主应力轴旋转的土体本构模型（基于一般应力空间的土体本构模型、运动硬化模型、边界面模型、土体弹塑性应力应变关系的完全应力增量表述等等）进行了较为系统的评述。

And the singularity exponent is uniquely determined by the viscosity coefficient of the material.

在线性硬化条件下，裂纹尖端的应力和应变场具有相同的幂奇异性，奇异性指数由材料的粘性系数唯一确定。

The effect of strain ratio on cyclic deformation behavior is small.

主应变比对循环硬化曲线没有影响。

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。

In the last two decades, lots of experimental and theoretic research on the hardening behavior and flow characteristics of metallic materials under nonproportional cyclic loading, and ratcheting for metallic materials has been done.

近年来，国内外不少学者对材料非比例应变循环加载下的材料循环附加硬化和流动特性进行了深入的研究，也对材料在应力循环下的棘轮行为进行了实验研究。

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。

Finite-strain constitutive relationship based on Oldroyd objective rate of Kirchhoff stress by τ-γ curve of torsion test with cylindrical specimens is presented.

以扭转实验测得的τ-γ曲线为基础，采用各向同性硬化大应变J2流动本构理论，给出了基于Kirchhoff应力的Oldroyd客观导数的塑性刚度函数h的表达式，建立了相应的大应变本构关系。

By means of the'material time derivative'relation of strain rate and strain, and the coordinates mapping in deformation zone, the different equations for solving strain and a subsequent recurrent solution are formulated.

第三，在Orowan轧制平衡方程的基础上，考虑温度，应变以及应变速率对材料流动应力的影响，改进了求解单位轧制压力的解析求解模型，采用数值积分的方法得到了能够反映温度变化和加工硬化等影响的轧制力的计算方法。

Strain rate hardening due to GBS suppressed the DRX softening and local necking so that the uniform and total elongations tended to increase at the temperatures of 400℃ and 500℃.

而晶界滑移所导致的应变速率硬化效果，则会降低动态再结晶对於材料的软化作用，进而增加AZ31B镁合金在400~500℃的均匀延伸率，并因抑制颈缩现象的进一步发生，而增加高温延性。

The split between the two groups can hardly be papered over.

这两个团体间的分歧难以掩饰。

This approach not only encourages a greater number of responses, but minimizes the likelihood of stale groupthink.

这种做法不仅鼓励了更多的反应，而且减少跟风的可能性。