So the piston end design must be improved in order to avoid edge damage and damage of axis perpendicularity due to uneven plastic deformation of the piston end surface.

为了避免活塞因端面不均衡塑性变形而导致端部边缘破损、端面与轴线垂直度破坏等情况发生，需要对活塞端部结构进行改进。

It was discussed in the paper that the method applied to the analysis of rigidly plastic deformation through examples of upsetting a cylindrical billet and drawing a square billet.

以圆柱坯热镦粗和方条料热拔长问题为例，论述了该方法在刚塑性变形分析中的应用。

Under the condition of the same loading conditions, the locomotive wheel had a greater effect on plastic deformation induced rail corrugation than the vehicle wheel did.

在相同载荷下，与车辆车轮相比，机车车轮对钢轨波磨影响较大；

The effect of the rolling on the plastic deformation of magnesium alloy AZ31 and its micro-orientation rheological behavior was explored by using cross shear rolling technique.

采用异步轧制技术研究了轧制工艺对AZ31镁合金塑性变形和微取向流变行为的影响。

Thirdly, with regard to stability of foundation pit excavation and support, the paper goes on to make analysis of limited plastic deformation and finite element simulation.

和支撑的稳定性，进行有限变形弹塑性分析和有限元法仿真分析。

A simplified model for calculating the deformations involved in bending channel section steel was established based on a finite element theory for large elastic-plastic deformation.

以弹塑性大变形有限元理论为基础，对槽钢成型过程做出合理简化，建立分析模型。

During skin rolling , the plastic deformation of strip is small, so the error of prediction with equal deformation in the high direction is large.

根据轧件平整轧制时塑性变形量很小，变形沿带材高度不均匀分布的特点，采用沿高度应力均匀分布的平面假设将带来比较大的误差。

Due to the sever plastic deformation, simulation of complicate aluminum profile extrusion with finite element method can not work well because of continuous mesh rezoning.

由于变形剧烈，复杂铝型材挤压成形有限元模拟会因网格不断重划分而精度欠佳。

At the same time, the yielding of underlying soil also reduces the plastic deformation of abutment stem, and increases the effect of foundation uplift.

同时，桥台底部土的屈服减小了传递到桥台底部塑性铰处的弯矩，进一步增强了桥台基础提离的效果。

Thus, deeply understanding the macro- and micro- plastic deformation mechanisms of BMGs is always important to the improvement of the ductility of BMGs.

因此，研究非晶合金的塑性变形机理和寻找提高塑性的途径是目前研究的热点问题。