If the difference of principal stress is less than the threshold,the duration of the first creep stage will reduce greatly wi.
本文选取西康某高速公路隧道围岩—石灰岩为研究对象,首先通过常规的单轴及三轴压缩实验, 获取石灰岩的常规力学参数,继而进行室内三轴蠕变实验,分析石灰岩在不同轴压条件下的蠕变变形特性, 得到了以下结论:①石灰岩存在一个门槛值,当主应力差小于此值时,初始蠕变阶段持续时间随着主应力差的增加大幅度减小;当主应力差大于此值时,初始蠕变阶段持续时间基本保持为一个恒定的较小值。
The concentrating zones of principal stress difference were extended and gradually migrated from the outside to the inside in the tunnel surroundings with the non-uniform stress field aggravating.
应用UDEC计算程序,分析了深部圆巷随开挖半径大小、应力水平高低和应力不均匀程度,围岩内主应力分布和能量耗散特征,发现随应力水平由低至高和应力不均匀程度的加剧,巷道围岩能量耗散值和能量耗散率均成凹形特征曲线急增;随开挖半径由小至大,能量耗散值成凹形曲线急增,但能量耗散率变化却很小;随着应力水平不均匀程度的加剧,在巷道围岩内部形成的主应力差值封闭包核区,呈现由围岩浅部向围岩深部跃移现象;当水平应力大于垂直应力时,在巷道顶板产生主应力差值封闭包核区的范围和量值大小,相对于巷道两帮更为严重。
Analysis on Thermal Stress of Thick-walled Spherical Head;
厚壁球形封头温差应力分析
Through the chemical composition analysis, metallographical observation, Manson-Haferd parameter extrapolation and thermal-stress calculation, it is found that the failure of conic nozzle was caused mainly by the thermal stress.
通过对一失效的下集气锥形管的金相宏微观检查、Manson Haferd参数估算锥形接管的持久寿命以及热应力的计算 ,发现锥形接管的失效原因主要是由温差应力所导致。
In this paper, the thermal stress on the selftight seal device with shear bolts is analysed by means of the momenttheory.
采用有力矩理论对抗剪螺栓高压自紧密封装置的温差应力进行了分析，得到温差应力与温差的关系式。
The Thermal Stress Analysis on High Pressure SelfTight Seal Device with Shear Bolts
抗剪螺栓高压自紧密封装置的温差应力分析
Analysis of Thermal Expansion Stress and Temperature Difference Stress for BOF Shell
转炉炉壳热膨胀应力和温度差应力的分析
Influence of the temperature difference between day and night on the stress of prestressed CFRP plate
昼夜温差对预应力碳纤维板应力的影响
Analysis of temperature variation and shrinkage effects on ultra-long prestressed concrete structure
超长预应力混凝土结构温差收缩效应分析
Numerical Analysis of the Thermal Stress Induced by Temperature Differences of Fixed Tube-Sheet Heat Exchangers
固定管板式换热器的温差热应力数值分析
Study of Temperature Stress of Box Water Conveying Bridge in Different Sunlight Temperature Mode
箱形输水桥不同日照温差模式下的温度应力研究
temperature-stress-strain diagram
温度-应力-应变图
heterogeneous thermoelectric effect
非均匀温度差电效应
Error Analysis of Simultaneous Strain and Temperature Measurement with Optical Fiber Bragg Grating Sensor
光纤布拉格光栅传感器应力和温度同时测量时的误差分析
difference curve
温差[差分，减差，差异]曲线
Large Temperature Difference Air Conditioning Units at Low Temperature Applications in the Subway
大温差低温送风空调机组在地铁的应用
austemper stressing
等温淬火表面应力;等温淬火前加应力;加工应力等温淬火
semiconductor sensor-type rate-of-rise and fixed temperature detector
半导体感应式差定温探测器
The Application of Nanotechnology to High Efficient Thermoelectric Materials
纳米技术在高效温差电材料中的应用
Analysis and Application of Weighted Mean Temperature Difference for Condenser
冷凝器加权平均温差原理分析及应用
uniaxial stress and temperature cycling test
单轴应力-温度循环试验
The Study of Temperature Field and Thermal Stress for Concrete Girder Bridges;
混凝土梁桥的温度场与温度应力研究
Thermal Stress Simulation Analysis and Temperature Control Measures for Crack Prevention Studies on High Arch Dam;
高拱坝温度应力仿真及温控防裂研究