Stress axis

Experimental study of acoustic emission characteristics of granite thermal cracking under middle-high temperature and triaxial stress

中高温三轴应力下鲁灰花岗岩热破裂声发射特征的试验研究

Based on elasticity theory, the triaxial stress formulas of casing exposed to thermal steam under thermal stress and non-uniform in-situ stress were derived.

以暴露于热蒸汽中的目的层套管为研究对象,根据弹性力学理论,首先给出了套管在热应力和非均匀地应力作用下的三轴应力表达式,然后利用对套管施加预应力来降低套管的轴向热应力,以使得套管的有效应力控制在相应温度下套管的最小屈服极限内为原则,得到了热采井套管三轴预应力设计方法,并对辽河油田常用的N80钢级套管进行了预应力设计分析,给出了该套管在不同注汽温度和井深条件下所应使用的径厚比及相应的预应力值。

Based on the elastic theory,this paper derived the triaxial stress formulas of casing exposed to heating steam under thermal stress and non-uniform geologic stress,and established a new method to design the prestress of casing.

以暴露于热蒸汽中的目的层套管为研究对象,根据弹性力学理论,首先给出了套管在热应力和非均匀地应力作用下的三轴应力表达式,然后利用对套管施加预应力来降低套管的轴向热应力,使得套管的有效应力控制在相应温度下套管的最小屈服极限内为原则,得到了热采井套管三轴预应力设计方法,并对辽河油田常用的N80钢级套管进行了预应力设计分析,给出了该套管在不同注汽温度和井深条件下所应使用的径厚比及相应的预应力值。

Measuring the axial stress in elliptic aluminum film using interference method;

干涉法测量铝薄膜的轴向应力

Calculation and statistical analysis of maximal axial stress at mining subsidence area

采空塌陷区管道最大轴向应力计算及统计分析

02 Rock Mechanics Test System,we tested the permeability of broken shale during its compacting process,getting the relation of the axial stress with differential seepage pressures and the relation of pressure gradient with seepage velocity.

02岩石力学伺服试验系统上完成了破碎页岩压实过程中的渗透特性测定,得到了轴向应力、渗透压差、水头梯度与渗流速度的关系,并分析了各种粒径破碎页岩在不同渗透速度下,轴向应力对渗透系数的影响。

In order to study the damage mechanism under different stress states of aluminum alloy component, two kinds of representative triaxial stress states have been adopted, namely notch tensile and pure shear.

为了研究铝合金构件在不同应力状态下损伤机理,采取了两种代表性的三轴应力状态,即缺口拉伸与纯剪切所产生的应力状态。

Several important factors influencing casing design and strength checkout were discussed in this paper, such as temperature and biaxial stress.

从温度对套管柱强度的影响、下部套管柱双轴应力计算等几个方面讨论了高温高压对套管柱设计和强度校核的影响 ,提出了一套适用于高温高压井套管柱设计和强度校核的理论方法 ,并给出了该方法的计算步骤 ,编制了相应的计算软件。

The damage evolution characteristics of concrete under biaxial stress are studied in this paper.

利用作者提出的混凝土各向异性损伤模型研究了混凝土材料双轴应力下的损伤演变规律在双轴应力比小于4。

At present,concretes and reinforced concretes are designed in uniaxial strength,but actually most of buildings are under biaxial stress.

文中从细观层次上分析了混凝土的内部结构,对混凝土试块在双轴应力作用下的力学特性进行了较为全面的随机骨料模型数值模拟。

Research on Numerical Simulation and Lifetime of High-temperature Components Creep Damage under Multiaxial Stress State;

多轴应力状态下高温部件蠕变损伤的数值模拟及寿命研究

The main factors influencing creep-fatigue failure under multiaxial stress and high tempera ture were investigated,and the simple model calculating method to predict the fa tigue life was worked out.

分析了高温多轴应力状态下不同应变保持时间和不同拉、扭应变比的实验结果，揭示了高温多轴应力下蠕变─疲劳失效行为的主要因素，进而提出了简捷有效的寿命计算模型和计算方法，即有交互作用系数的延性耗竭法。

Based on experiments of low-cycle tension-compression, torsion and tension-torsion fatigue with holding time, the interactional law of creep and fatigue under multiaxial stress is proposed.

通过对不同应变保持时间下的拉压、扭转和拉扭组合高温疲劳试验，得到了多轴应力下蠕变疲劳交互作用的特性及断口的微观相图，并且提出了多轴应力状态下疲劳寿命的统一方程。

Triaxial computational method for structure time dependent behavior;

三轴应力状态下结构时间效应的计算

Research on unsaturated loess experiment under triaxial stress

三轴应力状态下非饱和黄土试验研究

Study on red sandstone mechanical property under different stress path by triaxial test

不同三轴应力途径下红砂岩力学特性试验研究

It is frequently accelerated by the presence of an active environment and by triaxial stress.

激化环境和存在三轴应力，常可加速这种破坏。

Experimental study of structure steel in stress triaxiality on fracture properties

结构钢在三轴应力空间的断裂试验分析

Design and implementation of the software for the triaxial stress check of casing string

套管柱三轴应力校核软件的设计与实现

Test of the Dynamic Triaxial Stress-strain Hysteresis Curve of the Sand Soil and Study of its Characteristics of Dynamics

砂土动三轴应力应变滞回曲线试验及其动力特性研究

Experiment on Triaxial Pore Water Pressure-stress-strain Characteristics of Foamed Particle Light Weight Soil

发泡颗粒混合轻量土三轴应力-应变-孔压特性试验

Effect of Triaxial Stress on the Plastic Zone Distribution in Front of Crack Tip with Mixed Mode Loading

三轴应力状态下复合型裂纹尖端前缘的塑性区分布

Experimental Study of Water-sandstone Reaction under Triaxial Stress

三轴压力下水与砂岩反应的实验研究

Plane Strain Experiment Research of Simulating Stress Path of Excavation Pit by the True Triaxial Cell;

模拟基坑应力路径的真三轴平面应变试验研究

Experimental Investigation on Triaxial Frost Heaving Stress-Strain Relationship of Saturated Clay

饱和粘土三轴冻胀应力-应变关系试验研究

DEVELOPMENT AND APPLICATION OF TWIN-PISTON MULTIPURPOSE TRIAXIAL PRESSURE CHAMBERS

双活塞多功能三轴压力室的研制及其应用

The Behaviour Research of Triaxial Compression Test Under the Different Stress-Path in Dagan Ping Soft Clay

大甘坪软粘土不同应力路径的三轴试验特性

True Triaxial Test of Medium Stress Influence on Duncan-Zhang Model

中主应力对邓肯-张模型影响的真三轴试验研究

Experimental Study of Water-Sandstone/Limestone Reaction under Triaxial Stress;

三轴压力下水与砂岩、灰岩反应的实验研究

A plastic constitutive model for concrete with zero value of initial yield stress under triaxial compressive loading condition

零屈服应力下混凝土三轴受压塑性模型

Analysis of the direction of shear fracture trend surface in triaxial unequal stress fields

三轴不等应力场下剪切破裂趋势面方向探析