In this paper the formula of work of plastic deformation and the 3-dimensions figure of Twin shear stress yield criterion in the plane stress condition are derived. 文章导出了双剪应力屈服准则的塑性功串表达式及在平面应力条件下的三维图形;
Based upon the simulation results, the characteristic of the crown of strip was obtained, and with the analysis on the deformation of the work roll the effect of the deformation of the work roll on the crown of strip was obtained. 通过模拟阐述了轧后带钢凸度的特征,得出了弯辊力对轧后带钢凸度的影响,通过对工作辊变形的分析,得出了工作辊变形对带钢凸度的影响。
At the present time, the fillet welding seam-tracking of big work piece mainly depends on touched sensor, the shortcoming of it is wearing away quickly and deformation easily. 目前大型结构件的角焊缝跟踪主要是靠接触式传感器来实现的,接触式传感器存在探头磨损大、易变形等问题。
Change of Grain Elongation and Deformation Work in Stages of Plastic Deformation during Static Tension of Low Carbon Steel 低碳钢静拉伸时塑性变形阶段晶粒延伸率及形变功的变化
Use the magnetic balance test and research the relation of magnetic change and work hardening of Fe-Mn-C alloy during deformation process. 利用磁秤试验研究了Fe-Mn-C合金奥化体变形过程的磁性变化与加工硬化的关系。
Through many years of geological mapping in metamorphic terrains, it has been demonstrated that it is necessary to apply the work method of integrating the study of tectonic deformation with stratigraphic study in solving the geological problem about metamorphic series that have undergone complex deformation and metamorphism. 多年来变质岩区地质填图的实践证明,要解决经复杂变形和变质作用改造的变质岩系的地质问题,必须采用构造变形与地层学研究相结合的工作方法。
Friction factor between the work piece and die has great effect on the distribution of the strain field and deformation load; 摩擦系数对应变的分布和变形载荷有较大影响;
This paper gives the resultant forces and moments. strain energy and work of external forces on the basis of the deformation theory of flexible body. 本文按照易曲物体的形变理论来确定薄壳的内力和内矩,应变能以及外力的功。
Finally, the research work done in this thesis has been simplified summarized, and the research direction of 2D image deformation of and 3D synthesis of human face in the future has been provided. 最后,在简要回顾了本文工作的基础上,对二维人脸图像变形和三维人脸合成这两方面未来的研究方向进行了展望。
This paper takes a work roll into a semi-infinite body. The elastic flattening value is calculated by the formula of the elastic deformation that is caused by the rolling pressure and friction forces on the surface. 本文视轧机工作辊为半无限体,用其表面压力、切力的位移公式求解工作辊在轧制变形区内的弹性压扁;
On the basis of the similarly non-coupled equations, two theorems of different work of similarly non-coupled systems for deformation theory and flow theory are derived. 基于相似非耦联方程,导出了变形理论和流动理论相似非耦联系统的两个差功原理。
Moreover, the thermal behavior of work roller of high stiff wide plate mill was analyzed, the study provide the foundation for researching the thermal deformation of the work roller. 在此基础上对高刚度宽板轧机工作辊的热行为进行了分析,为研究工作辊的热变形提供了依据。
Abstract According to the correlation between deformation work and melting heat energy, the experimental method of uniaxial tension is applied to measure melting heat energy and deformation heat effect in this paper. 本文根据变形功与熔化热能的关系,将简单拉伸实验方法推广应用到了熔化热能和变形热效应的测量上。
The state of the art of theory researches and practical applications highlights that it is significative to continue the work of predecessor to thoroughly investigate the variation laws of the ultimate load-carrying capacity and the deformation of I-section steel arches with holes in web. 本文正是基于这种结构的科研和工程现状,在前人工作的基础上对腹板开洞工形截面钢拱的极限承载力和变形的变化规律进行了研究分析。
The influence of technological parameters on the deformation load was analysed in detail. friction factor between the work piece and die has great effect on the distribution of the strain field and deformation load; 文章分析了工艺参数对变形载荷的影响,定量地解释了各影响曲线的变化趋势。摩擦系数对应变的分布和变形载荷有较大影响;
The monitoring work of ground deformation have made considerable progress promoted by the advances of sciences. The booming of market economy resulted in unique way of deformation monitoring management. 科学的进步使地形变监测事业得到长足发展,市场经济的繁荣催生出形变监测行业独有的管理之道。
A compound model including discrete Kirchhoff theory ( DKT) pate shell element and membrane element is introduced into virtual work rate principle of elasto plastic finite deformation. 将离散Kirchhof理论(DKT)平板弯曲单元和薄膜单元的组合模型引入到弹塑性有限变形的虚功率增率型原理中。
A study on the work performance of rock embedding anchors and the longitudinal deformation of anchors 嵌岩挖孔桩工作性状及桩身纵向弯曲变形研究
The main work is as follows: 1. Based on the principle of deformation dynamics, a new element model for deformable bodies is established. 本文的主要工作如下:1.基于变形体动力学原理,建立了新的可变形块体单元模型。
In order to assign reasonable work face, and determine appropriate advancing speed of mining face, and control building deformation in time, it is needed to predict the laws, the deformation value and the corresponding positions of any-time surface movement in Mining Process. 要完善解决建筑物压煤开采问题的措施,需要预计开采过程中任一时刻,地表移动分布规律、变形值及出现位置,以布置合理的开采工作面,选择适当的开采速度,及时控制建筑物变形。
How to effective repair and reconstruction the roads of deformation and damage is a very important issue, it is also a problem, it is an important part which of To carry out research work of saline soil subgrade salt-frost heave deformation properties in southern Xinjiang. 如何对变形破坏道路进行有效的修复和重建是一个十分重要的课题,也是一个难题,其中一个重要内容就是要开展南疆盐渍土路基盐-冻胀变形特性的研究。
Main research work is as follows: From the viewpoint of elasto-plastic mechanics theory, the deformation process of press straightening is analyzed, and the main technological parameters in press straightening technology flow are also expounded. 主要工作如下:以弹塑性力学理论为基础,分析了压力矫直变形过程,依据压力矫直工艺流程指出了主要矫直工艺参数。
To ensure the normal work of the system, the deformation control of the bracket is strict. Horizontal load controls, and mechanical complexity of support. How to deal with the relationship between distortion and the project cost is the problem of the design. 支架结构受力复杂,系统正常工作时对支架结构变形量的控制较为严格,支架结构是系统得以应用的控制因素,因此,如何处理好变形量与工程造价之间的关系是支架设计的关键问题。
Ratcheting can shorten the fatigue life of components or induce the components not to work normally because of the exceed-limit deformation. It is important to consider ratcheting in designing engineering structures. 棘轮效应可能导致疲劳寿命的减少或使结构的变形超过限制而不能正常工作,是实际工程结构设计中需要考虑的一个重要问题。
Based on the large number of data of compression test and triaxial test, analytical and numerical work of consolidation of large deformation were carried out considering the effect of complicated nonlinear characteristics, and the parameters analysis of the consolidation equation were also presented. 本文在前人大量试验成果的基础上,考虑各种复杂非线性的影响,对大变形固结理论进行了解析与数值分析,并对固结方程中的不同参数进行了讨论。
Deformation monitoring is one of the important work in the construction of High-speed railway. Through the data and information that deformation monitoring provide, we can warn and forecast in order to prevent unnecessary and loss for Engineering and Social. 变形监测是高速铁路客运专线建设中的一项重要工作,通过变形监测提供的数据和信息,进行示警和预报,可以防止对工程和社会造成不必要的破坏和损失。
With the deep development of the research work, the calculation and control of lateral deformation of tall building structures become more and more important. 随着研究工作的深入开展,高层建筑结构侧向变形的计算与控制越来越受到重视。
With the improvement of the velocity of railway system and the development of technical criterion, the requirement of railway foundation work developed gradually. The main design idea of the ballast engineering had changed from the intensity control to the deformation control. 随求也不断提高,路基工程已由以往的强度控制设计思想发展为变形控制为主的设着铁路运营速度的不断提高和技术标准的不断发展,对铁路基础工程的要计思想。
However, in clinical work, there are a variety of unsuccessful restorations caused by deformation of models obtained from elastomeric impression materials. 然而,在临床工作中用此类印模材料制取印模后,仍然会出现因模型的变形导致的失败修复体。