查询词典 constitutive

ABSTRACT In this dissertation, the dynamic process, the constitutive relation and the action between reinforcing steel bar and the concrete are systematically studied on the basis of the former research.

本文在前人研究工作的基础上，对弹体侵彻、贯穿钢筋混凝土的动力学过程、本构模型和钢筋与混凝土之间的作用等问题进行了深入的研究。

The paper points that the insurance subrogation should comprise two part: the right of subrogation and the jus ad rem of subrogation ; then, the paper analyzes its constitutive requirements, legal relation, essence, characters and its functions.

文章首先为保险代位正名，指出保险代位是保险人享有的、代位行使被保险人对造成保险标的损害而负有民事责任的第三人的求偿权或取得被保险人对保险标的残余物的所有权的一种权利，它应包括权利代位和物上代位两层含义

Based on the early works, the C program language and the least square method were used to obtain the thermal viscoplastic constitutive equation.A mechanical thermal coupled model was created and DEFORM-2D was used to analyze the thermal and mechanical parameters' changing during the process of adiabatic shearing.

我们在所作的前期工作及国内外的研究成果的基础上，应用C语言程序实现了最小二乘法拟合热一粘塑性本构方程中待定参数的求解过程；在此基础上应用DEFORM 2D 有限元分析系统对，Ti-6A1-4V绝热剪切过程中的热一力变化历史进行了分析；在数值模拟结果的基础上，进行了再结晶动力学的分析与计算。

The aeolian soil studied in this article is different with other local earth constitutive properties obviously.

本文研究的风积土与其它地区土的结构性明显不同。

The main factors affecting the soil-structure interface behaviors were found experimentally and theoretically, including: 1 the thickness of the interface that is five to six times the average grain size of the soil; 2 the aeolotropy of interface, which is responsible for anisotropic response of the stress-strain response of the interface; 3 two physical states, including crashing and compression of the soil near the structure surface, which govern the stress-strain response of the interface strongly; 4 two shear deformation components due to sliding and constraint of the structure surface relative to the soil respectively, which forms the deformation of the interface; 5 the volumetric strain due to dilatancy, which is found to be composed of a reversible dilatancy component and an irreversible dilatancy component. 4. A unified constitutive model of the interface, based on new elasto-plasticity damage theory, was developed. It was confirmed to be effective for the conditions considering monotonic and cyclic shearing, coupling effect of shear and volumetric strains, evolution of physical state, micro-structure aeolotropy of the soil and the resulting aeolotropy of the interface as well as the three normal boundary conditions stated above. 5. 2D and 3D finite element formulations of the present model were derived and incorporated into the FEM codes. They were applied to the evaluation of practical engineering problems with different typical interfaces between soil and structure. The new model was shown to be reasonable and effective.

确定了粗粒土与结构接触面厚度约为5～6倍的平均粒径，首次揭示了接触面的细观结构异向性以及由此所引起的宏观剪切异向性，发现了在单调和往返剪切荷载作用下土颗粒破碎和剪切压密两种物态变化机制共同支配着接触面力学性质的变化，通过细观分析证实了接触面的变形可分解为一般同时发生的土与结构交界面上的滑移变形以及结构面位移约束范围之内土体本身的剪切变形两部分，观测到接触面受剪时表现出明显的相对法向位移，并可分解为可逆性和不可逆性两个分量；(4)建立了第一个能够统一地描述单调与往返剪切特性、剪应变与体应变耦合特性、细观结构和宏观剪切异向性以及土颗粒破碎等物态变化特性的土与结构接触面弹塑性损伤本构数学模型，并采用多种法向边界条件复杂加载路径的试验成果验证了新模型的合理性和有效性；(5)提出了新模型的二、三维有限元格式并结合实际边值问题进行了应用计算分析，比较了不同接触面本构模型对计算结果的影响，证实了新模型及其有限元格式不仅能够合理地描述土与结构接触面的主要力学特性，还能够较好地反映土体与结构物在接触面处的滑移、脱开等不连续现象。

Secondly, by applying inverse Fourier integral transform to the displacement, and uniting the constitutive and geometrical equations, the analytical expression of stress in Laplace domain were derived. Thirdly, by defining dislocation density functions, the Cauchy singular integral equations were obtained according to the boundary condition and interface connection conditions, and the problem was reduced to algebraic equations by Chebyshev orthogonal polynomial. Based the these, the unknown coefficient of the algebraic equations can be solved by Schmidt method. Finally, the time response of dynamic stress intensity factor and energy release rate are obtained by inverse Laplace transform.

首先，利用积分变换方法，推导出粘弹性层的控制方程组；其次，引入位错密度函数，并结合边界条件和界面连接条件，导出反映裂纹尖端奇异性的Cauchy型奇异积分方程组，然后，应用Chebyshev正交多项式化奇异积分方程组为代数方程组，并采用Schmidt方法对其数值求解，最后，经过Laplace逆变换，求得动态应力强度因子和能量释放率的时间响应。

2519 Aluminum alloy constitutive relation of artificial neural network...

2519铝合金本构关系的人工神经网络模型。

For the anisotropism problem in the viscoplastic constitutive model, a four-step anisotropic tensor is generally used to describe it, but there are some difficulties to determine the tensor's components.

为此，本文引用传统塑性力学中各向异性当量屈服应力的概念，在现有Walker模型的基础上得到了一个更加便于工程应用的正交各向异性粘塑性损伤统一本构方程。

These results demonstrate that constitutive expression of Tert provides antiaging activity in the context of a mammalian organism.

这些研究结果表明在哺乳动物有机体背景下，端粒逆转录酶能够产生抗机体老化的作用。

With the adoption of the rate-sensitive constitutive relationship, it is asymptotically investigated the propagating tip fields of antiplane mode III crack under the condition of incompressibility, and the dynamics equations are obtained separately governing the stress and strain fields at the crack-tip.

采用这种率敏感型本构关系，本文对不可压缩条件下反平面Ⅲ型扩展裂纹的尖端场进行了渐近分析，分别求得了其裂纹尖端应力和应变场的动力学控制方程。

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。