查询词典 spif

Based on the WM-model, the various stages of SPIF process was studied and the forming characters have been realized. Based on the SM-model of the truncated cone, the blank thickness element was sub-meshed into three levels. And through the forming simulation of the process, access to the plate stress and strain of the different regions in forming, and proposed the establishment of a sub-regional mechanism to explain the incremental forming, that is, in different regions, sheet deformation is different. In the main region which reflects the major character of SPIF, the deformation pattern is the composition of bending and extrusion.

基于完整有限元分析模型对渐进成形过程的各阶段进行分析，从而全面认识渐进成形的特点；基于方锥台件局部有限元分析模型，并将板材厚度方向的单元细分为三层，通过成形过程仿真，获取成形中，板材不同区域的应力、应变情况，提出并建立分区域的渐进成形机理解释，即，在不同区域，板材的变形方式是不同的，其中，对体现渐进成形主要特点的方锥台件和圆锥台件的侧壁充分变形区域，其变形方式是拉伸-弯曲复合变形。

Based on the SM-model of the truncated pyramid, the SPIF processes with different parameters were simulated. And the process parameters on changes in the thickness, plastic deformation region, forming force and so on were reseached.

基于方锥台件局部有限元分析模型，对不同工艺参数下的成形过程进行仿真，研究工艺参数板材厚度变化、塑性变形区、以及成形力等的影响关系。

To solve these problems, the deformation mechanism of SPIF should be studied seriously.

要解决这些问题，就需要对金属板材单点渐进成形的变形机理进行深入研究。

This article introduces the realization of these process areas supported by SPIF in detail, and the roles of SPIF in evaluation of capability and the improvement of process in software development.

介绍了这些过程域在SPIF中的实现以及SPIF对软件开发能力的评估和开发过程的改善所起到的作用。

Finally, the numerical simulation approach of tool wear was studid on the basis of numerical simulation of SPIF, and the process parameters on the impact of the tool wear were researched.

最后，在渐进成形数值分析的基础上，探讨了对工具头磨损进行数值模拟分析的方法和流程，并通过仿真，研究了工艺参数对工具磨损的影响关系。

In the application, SPIF still exist some of the pressing need to address the question of how to select the correct technical parameters and how to avoid cracking in the forming.

金属板材单点渐进成形工艺在应用中还存在一些迫切需要解决的问题，如何合理选择工艺参数、如何避免成形中的破裂等。

Based on the nonlinear, elastic-plastic finite element method theory, the modeling approach of the numerical simulatioin of SPIF was studied firstly in this project.

本课题首先基于非线性、弹塑性有限元理论方法，对金属板材单点渐进成形过程的数值模拟的建模方法进行研究。

Software measurement implemented in SPIF mainly corresponds with measurement-related process areas in CMMI.

软件过程集成框架SPIF中实现的软件测量主要是对应于CMMI中与软件测量有关的过程域。

WM-Model is established based on the realy situation of SPIF process, but SM-mdoel is established throuth adding suppositional bundary conditions.

完整有限元分析模型是建立在对渐进成形过程边界条件、力学关系等的真实仿真基础上，而为了提高模拟效率建立的局部有限元分析模型，是通过添加虚拟的边界约束而仿真成形过程。

In SPIF process, the loading trajectory is complex and long, the thinning of the sheet thickness is dramatic, and the local deformations are accumulated. So, there are some difficutis in the numeriacla simulation of SPIF. For example, the modeling of SPIF is difficult and the computational efficiency is low.

金属板材单点渐进成形由于自身的特点，如成形过程载荷加载轨迹复杂且长、板材厚度的剧烈减薄变化、以及局部变形累积等，使得对其进行有限元法数值模拟存在建模难度大、计算效率低等难点问题。

Do you know, i need you to come back

你知道吗，我需要你回来

Yang yinshu、Wang xiangsheng、Li decang,The first discovery of haemaphysalis conicinna.

1〕 杨银书，王祥生，李德昌。安徽省首次发现嗜群血蜱。