应力轴

This effect is examined in this paper, and a reduction factor accounting for the effect of the complex stress state in U jacketed RC beams is proposed based on test results from literature.

该文研究了混凝土多轴应力状态对FRP-混凝土界面性能的影响，并根据试验研究结果，提出了U 形FRP 加固混凝土梁中FRP 剥离应变的折减系数。

The coiled tubing fatigue belongs to overlow cycle fatigue at multi-axial stress state. The prediction theory of this field is far from comp lete.

而连续油管的疲劳是应力状态较复杂的多轴超低循环疲劳，目前该疲劳寿命预测理论还很不成熟。

In order to overcome the defect of traditional methods and to find a new simply and effective time-domain method to eliminate the influence of boundary reflection. The main contents of studies and achievements are as follows: The liquefiable saturated sand dynamic character researches are conducted by means of the resonant column test and the dynamic tri-axial test; The undrain dynamic relationship between stress and strain, the damping ratio, saturated sand liquefaction mechanism, laboratory liquefaction standard, the effective factors of liquefaction are considered in laboratory. Liquefaction strength parameters used in element numerical simulation are obtained.

为克服传统方法存在的问题，寻求一种简单有效、能消除截断边界反射影响的时域有限元方法，本文主要开展了如下研究工作：对工程场地土体进行了标准贯入、静力触探、剪切波速等现场原位试验、室内动三轴试验以及共振柱试验，针对研究区域内可液化的饱和土进行了动力特性试验研究，分析了饱和土体的不排水动应力～应变关系和阻尼特性；对研究区域内的饱和砂土的液化机理，室内试验液化判别标准及影响饱和砂土液化的诸多因素进行了研究，得出了工程场地土体的抗液化强度指标等有限元模拟所需参数。

Through contrasting and analysing the experimental results from these methods, the paper summarizes the regularity of collapsing deformation and the shear strength index changes with the degree of saturation and stress, describes the collapsing deformation properties and strength characters of the collapsible loess in the course of moistening and drying, and describes the influence to collapsing deformation of loess from different paths of stress. Through performing monaxial compression test on samples with different paths of inundation and direction of press, proves the conclusion that collapse has nothing to do with the path of inundation and the collapsible loess has the prominent anisotropy characters.

通过对几种方法得出的试验结果进行对比和分析，总结出黄土的湿陷变形和抗剪强度指标随饱和度以及压力变化的规律，借以描述湿陷性黄土在增湿过程中的湿陷变形性状、强度特性以及不同应力路径对黄土变形特性的影响；按不同的浸水路径和受力方向对土样进行单轴压缩试验，证明了湿陷与浸水路径无关的结论以及湿陷性黄土显著的各向异性特征。

In order to solve the experimental problem of tricrystal,elastic stress distribution of copper tricrystal under monotonical loading was analyzed by finite element method,the shear stress on slip system in each grain was analyzed.

采用有限单元法计算三晶体在单向拉伸载荷作用下弹性阶段的应力场，分析了三晶体中各晶粒主滑移系上的切应力分布，计算结果表明，当晶界平行于加载轴时，该晶界对其两侧晶粒有很明显的作用，较大程度的改变晶粒滑移系的形式，而且作用程度要超过三晶交点的作用，倾斜晶界则没有明显的作用。

The new simplified method to determine the course of multiaxial creep stress relaxation is proposed.

提出了决定多轴蠕变应力松弛的改进简化方法。

But report about experimental research on mechanical behavior of concrete under multiaxial stress subjected to high temperature or freeze-thaw cycling is difficult to be seen.

目前，国内外关于这方面的试验及理论研究，都是针对混凝土单轴应力状态而展开的，并且资料甚少。

In view of the anisotropic damage characteristics of concrete under multiaxial stress state, an anisotropic elastoplastic damage model is presented.

针对混凝土多轴应力状态下各向异性损伤的特点，建立了各向异性弹塑性损伤模型。

Based on experimental investigation on strength, deformation and failure mode of concrete under multiaxial stress states, a nonlinear elastic orthotropic constitutive model is proposed.

根据对混凝土多轴应力下强度、变形和破坏形态的大量试验研究，建立了非线弹性正交异性本构模型。

The biaxial nonproportional cyclic strap testsfor circular and rhombic strain paths, and the cyclic cachetting tests for four nonpmportinnalcyclic paths with mean stresses were conducted.

开展了圆形和菱形应变路径的双轴非比例循环加载试验；并进行了4种具有平均应力的非比例循环路径的循环棘轮试验。

In the United States, chronic alcoholism and hepatitis C are the most common ones.

在美国，慢性酒精中毒，肝炎是最常见的。

If you have any questions, you can contact me anytime.

如果有任何问题，你可以随时联系我。