查询词典 constitutive

In terms of continuum mechanics and nonequilibrium irreversible thermodynamics theories, compressible Leonov constitutive model is derived to describe large recoverable elastic strain development in non-isothermal flow of compressible viscoelastic melts. It is tempting to specify the model and then compare it to basic rheological tests in the hope that such a model will yield a good description of the nonlinear viscoelasticity of polymer melts.

注射成型是聚合物的主要成型加工方法之一，成型过程中聚合物要经历熔体流动和固化等非等温、非平衡过程，由于聚合物的粘弹性，流动过程中建立的剪切应力、法向应力和大弹性形变在固化过程中不能完全松弛，在制品中形成残余应力和取向，对制品的机械和光学性能有着重要影响。

The general constitutive equation of the rheological component model is a linear ordinary differential equation of N order, which is a typical SISO linear stationary system.

岩石流变组合模型的本构方程通式—n阶线性常微分方程，是一种典型的SISO线性定常系统。

Part I is soil dynamics including dynamic strength, deformation and pore pressure of soil, liquation of saturate sand, dynamic constitutive model of soil, dynamic response analysis of soil and dynamic stability analysis of soil.

包括土的动强度、动变形与动孔隙水压力，饱和砂土的振动液化，土的动力本构模型，土体的动力反应分析和土体动力稳定性的分析。

Further more, researches on structural constitutive model fall into a bran-new field and involve many unfathomed problems, just as selecting structural parameters and coupling these parameters and macrophysics properties.

而结构下本构模型的研究是一个全新领域，所涉及的问题很多，尤其结构参数的选取及其与宏观力学耦合等问题急待人们深入探索。

What the microscope thinning out the skin tumour malignantly sees has it's characteristic is that the identical tumour of outward appearance forms festival in single's tumour tubercles or naked eyes having the obvious various block of wood Same organization is constitutive.

单个纤维性胸膜间皮瘤。从脏层胸膜生长，平板或肉茎状，肿瘤引起临床症状是由于它们扩大发展，挤压胸内结构使其移位，如能早期诊断，可作手术治疗。②广泛扩散的间皮瘤。此类型侵犯肺叶，浸润膈肌、肋间肌，可通过纵隔胸膜而累及心包和大血管。

And then, the change of elastoplastic matrix, parameters of material mechanics performance with temperature were considered, from thermal elastoplastic constitutive relation and applying the theory of thermal elastoplastic increment, the theoretical finite element equation was established.

考虑了弹塑性矩阵、材料的力学性能参数随温度变化的因素，从热弹塑性本构理论出发，应用热弹塑性增量理论建立了热弹塑性有限元方程。

Keywords: metalic foams; constitutive model; damage and failure; mesostructure; dynamic response

中文关键词：泡沫金属；本构模型，损伤破坏；微结构；动态响应

To establish the constitutive equation of material, the metric tensor for stress , strain and their transformation equations between different configurations are derived, and basic theory of finite deformation as well as elasto-plastic deformation criterion are studied. By analyzing the applicability of different element models, four-node quadrilateral degenerated Mindlin isoparametric element is adopted because of its good versatility, and the element stiffness matrix is derived. The static implicit elasto-plastic finite element equation for complex skin stretch-forming is put forward based on Updated Langrange formulation.

本文首先系统地阐述了有限变形的相关基本理论，针对板料成形建立了应力应变度量张量及其相应的转换关系；介绍了材料的屈服准则、塑性变形强化规律、塑性流动规律以及加、卸载准则，并在此基础上建立了有限变形各向异性弹塑性本构方程；对板料成形的单元模型进行了分析，针对飞机蒙皮零件特点，采用通用性强的四节点四边形退化Mindlin等参壳单元进行成形模拟，并导出其单元刚度矩阵的具体形式；基于以上研究，以逐级更新Langrange描述的持续虚功率原理为基础，建立了率形式的复杂蒙皮拉形过程静态隐式弹塑性有限元方程。

The domain of microcrack growth is defined and used to describe the damage state of microcrack-weakened brittle materials. Based on this concept, the problems of micro-damage evolution and macro-constitutive response can be solved easily.

建议用微裂纹扩展区的概念来描述脆性材料的各向异性损伤状态，从而方便地解决了复杂加载路径下材料的细观损伤演化和宏观本构关系问题。

Uncertainty of parameters, shortage of data, mistiness of constitutive law, and serious nonlinearity has been a big obstacle to engineers.

参数给不准，数据有限，本构机理不清楚，不确定性和非线性极强，已成为困扰岩土工程师的严重问题。

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。