查询词典 deformation curve

By anchoring an imaginary spring between each data point and deformable curve or surface, the fairing model is established. Then FEM is used to solve the deformation problem of the model caused by imaginary springs and a bicubic B-spline surface patch is taken as one element. Lastly the B-spline active surface model is applied to surface reconstruction from layer data and the problem resulted from fitting for uneven cross-sectional curves can be solved.

通过在数据点与模型之间连接虚拟弹簧，建立光顺模型，并以双三次B样条曲面片作为单元，运用有限元法对模型在虚拟弹簧作用下的变形问题进行求解，得到光顺后的B样条曲面；并在此基础上，提出了一种新的基于断层数据的表面重建方法，可很好地解决不均匀截面族的曲面生成问题。

Having considered material non-linear, this dissertation adopts space isoperimetric element and calculates the ultimate load of this skew hollow slab in several kinds of behaviours. From the computational results, the curve of load and deflection can be drawn and the stress, deformation and destruction characteristic can also be known.

本文采用等参体单元，考虑混凝土材料非线性，对预应力混凝土斜交空心板在多种工况下的极限承载力进行了分析，得出了相应的荷载～挠度曲线和受力、变形及破坏特点。

The load -step curve and the stress distribution figures during the deformation and fail ure process of the concrete specimen were presented.

计算机模拟给出了试件的载荷-加载步曲线和混凝土试件的破坏过程的应力分布图。

The value of strain-hardening coefficient can be determined from the slope of logσ-logε curve, which is numerically equal to the maximum uniform true strain. So the strain-hardening coefficient can be used to evaluate the extend of uniform plastic deformation.

由拉伸实验得到的logσ-logε曲线的斜率即为应变硬化指数，其数值与材料拉伸变形时的最大均匀应变相等，是衡量材料塑性均匀变形能力的力学指标。

This project studies the scale-dependent deformation behavior of the metal matrix composite, the void nucleation and void growth mechanisms at the micron/submicron scale. The main results are:(1) In prophase, growth and coalescence of the void embedded in the graded matrix are analyzed in detailed;(2) Based on the infinite solid model containing a micro-void, coupling effects of the void shape and the void size on the void growth are studied carefully, the results show that it seems to exist a critical equivalent void radius, which is associated with the material length. When radius of a microvoid is close to or smaller than the critical void radius, the micro-void growth rate is essentially eliminated;(3) The coupling effects of the particle shape and size on the mesoscopic stress fields within the particle and matrix are also investigated by introducing the conception of inclusion/matrix interfacial energy. The results show that the stress concentration factors within the particle and on the matrix/particle interface are also strongly size-dependent,so the void nucleation mechanism is size-dependent.(4) By employing a specific orthogonal curve coordinate frame and a 'kernel function' conception, a 'unified method'solving the spheriodal and spherical void problems is suggested; by this unified method, size-dependent plastic potentials of the porous materials containing the spheriodal or spherical voids are obtained, which extend the traditional Gurson model for the spherical void and GLD model for the spheriodal voids to the micron scale.(5) Based on the RVE model containing the spheriodal or spherical particles, the influences of the particle shape and size on the size-dependent mechanical behavior of metal matrix composite are studied.

中文摘要：本项目对金属基复合材料在微细观尺度下的尺度相关变形行为、孔洞形核及长大的机理和模型进行了研究，取得了如下主要结果：1）在前期研究中，探讨了基体的梯度分布对孔洞长大和聚合的影响；2）基于含孔洞的无限大体模型，探讨了孔洞形状和孔洞尺寸对其长大的耦合作用，结果表明：可能存在一个与材料特征长度相关的临界孔洞尺寸，当椭球孔洞的等效半径小于临界孔洞半径时，孔洞的长大受到明显抑制；3）通过引入基体/夹杂界面能的概念，分析了夹杂尺寸、夹杂形状对材料细观应力场的耦合影响，结果表明：颗粒内部和界面上的应力集中因子强烈地依赖于夹杂的尺寸和形状，因此，孔洞的形核机理是尺寸相关的；4）采用一种特殊的正交曲线坐标系和引入"核函数"的概念，"统一"地得到了含椭球和球形孔洞的材料的尺寸相关塑性势，它将传统的Gurson球形孔洞模型和GLD椭球孔洞模型推广到微尺度范围；5）基于含椭球和球形夹杂的体胞模型，初步研究了夹杂形状、夹杂尺寸对金属基复合材料尺寸相关力学行为的影响。

This paper studies on the ground settlement due to the deformation of the supporting structure. The normal distribution and parabola function are used to fit the curve of ground settlement and the estimating formula is deduced gradually.

本文主要对由于支护结构变位而引起的地表沉降进行了相关研究，利用正态分布及抛物线函数拟合了地表沉降曲线，并推导出沉降的估算公式。

The thesis discusses two respects of contents: One is deformation of combination of parametric curve.

本文论述了二个方面的内容：一是组合参数曲线的变形。

By analyzing the displacement mode of unstable soil and the deformation mechanism of passive pile,an elastic perfectly plastic model and a hyperbolic curve model about the behavior of piled bridge abutment against soil lateral movements are developed on the basis of the previous research.

通过总结侧向变形土体常见的位移模式，分析桥台桩的变形机制，在阐述不同模式下桩侧压力的产生机理及桩的几种破坏模式的基础上，提出桩土间相互作用力与桩土间相对位移的双曲线关系模型和理想弹塑性关系模型，可为相关研究提供参考。

The corrosion resistance of nanocrystalline nickel wascompared with that of Watt nickel and polycrystalline nickel plate in thesolution of NaCl and HCl by the methods of static soak and polar anodicpolarization curve and the mechanism of corrosion was analyzed. Themechanical property of nano- crystalline nickel was evaluated by macroscopictension and the microscopic process of deformation and fracture was observedby in-situ tension test under TEM.

在此基础上，采用差热分析、XRD 及 TEM 等手段研究纳米晶体镍的热稳定性；利用静态浸泡、阳极极化曲线等方法研究纳米晶体镍的耐蚀性能；采用宏观拉伸的方法考察了纳米晶体镍的力学性能，并用 TEM 原位拉伸法观察纳米晶体镍形变与断裂过程的微观过程。

As to strong nonlinear analysis, deformation of local collapse can be considered by increasing horizontal division which it can make a descent segment of skeleton curve more obviously.

对于强非线性分析，增加水平划分可以考虑局部的破坏变形，使骨架曲线下降段明显。

On the other hand, the more important thing is because the urban housing is a kind of heterogeneity products.

另一方面，更重要的是由于城市住房是一种异质性产品。

Climate histogram is the fall that collects place measure calm value, cent serves as cross axle for a few equal interval, the area that the frequency that the value appears according to place is accumulated and becomes will be determined inside each interval, discharge the graph that rise with post, also be called histogram.

气候直方图是将所收集的降水量测定值，分为几个相等的区间作为横轴，并将各区间内所测定值依所出现的次数累积而成的面积，用柱子排起来的图形，也叫做柱状图。