压应力

With the universal application of computer and development of numerical implementation, building member models fitting reality by computer can calculate buckling bearing capacity of axle loading members under effect of residual stresses.

随着计算机普及应用和数值分析方法的不断发展，可以通过计算机建立与实际吻合的构件模型，较准确、快捷地计算出残余应力影响下的轴压构件屈曲承载力。

The basis of static, flat汇交system of forces, torque and couple Department of plane, plane general system of forces, center of gravity and centroid, the internal force and internal force diagram, tension and compression, torsion, bending, stress analysis and strength of the theory of the stability bar , the point of movement, the basic rigid-body movement, points of complex, rigid body planar motion, the movement of particle differential equations, dynamic general theorem, static and dynamic method.

静力学基础、平面汇交力系、力矩与平面力偶系、平面一般力系、重心和形心、内力和内力图、拉伸和压缩、扭转、弯曲、应力状态分析和强度理论、压杆的稳定性、点的运动、刚体的基本运动、点的复合运动、刚体的平面运动、质点的运动微分方程、动力学普遍定理、动静法。

The mechanisms summarized are as follows: 1 compressional normal stress;2 ductile and/or viscous deformation in bedding fault since incompetent bed is susceptible to plastic flow;3 higher li.

其机理可归纳为四个方面：1压性的正应力；2以韧性及粘性变形为主，因为非能干岩层易塑性流变；3涂抹效应强；4面理化组构，垂直面理方向的封闭能力大大增强。

Based on the solution of the collapse load of LTA straight pipe and the stress level of elbow without defect,the solution of the collapse load of LTA pressurized elbow is presented.The way to assess the safety of LTA of pipe bend is given.

本文在对局部减薄直管的极限载荷和无缺陷弯头的应力状态进行研究分析的基础上，提出了内压作用下局部减薄弯头极限载荷的计算式，并给出评定局部减薄弯头安全性的方法。

With the small test sample to simulate the local stress conditions of the coupler knuckles,the fatigue tests are carried out according to the load spectrums of pulling and pressing programs of the freight car coupler s and their simplified spectrums.

用小试样模拟钩舌局部区域应力状态，分别按货车车钩拉、压程序载荷谱和该谱的简化谱进行疲劳试验，所得的疲劳寿命值与现场车钩运用调查统计值均相符合；同时，对 AAR所推荐的恒幅载荷也进行了试样的疲劳试

Stress wave effect is one important parameter considered in the study and it may have some influence on the dynamic buckling of axial compression member.

其中，应力波效应也作为一个重要参数纳入到研究范围中，对轴心受压构件的动力屈曲有重要影响。

Fourth, systematic study on dynamic buckling of axial compression initial bending member through finite difference method, considered residual stress simultaneously, make some valuable conclusions.

然后，通过有限差分法对初始几何缺陷轴心受压构件的动力屈曲进行计算，并同时考虑残余应力作用，得到了一些有价值的结论。

Based on the relations among the stress, final wall-thickness of thin-walled tube and the characteristics of tube material, original size, curling radius along with friction condition in a axially-compressed internal inversion process on right-angled fillet die, some analytical discriminants were established for judging if a double-layered tubular piece of aluminum alloy could be steadily formed from a certain-sized round tube via internal inversion process without interference and plastic instability of tube wall, and a method was put forward for determining the maximum and minimum usable curling radius or die fillet-radius for thin-walled tubes in the process.

基于薄壁管直角圆角模轴压内翻过程中各处应力及最终壁厚与管材特性、管坯尺寸、卷曲半径及摩擦条件之间的关系，推出了判别任一铝合金双层管件可否由特定尺寸圆管稳定内翻成形而不出现管壁干涉与塑性失稳问题的解析判别式，指出了确定薄壁管圆角模内翻卷曲半径或模具圆角半径极限值的方法。

Germany- made plasma cutter and welder (line welding machine and circular welding machine, one set for each); 12 argon welding machines; 4 electric welding machines; 1 spot welder; 3 CO2 welders; 2 oil buffer machines; 2 motor rolling machines; 8 motor wheels; 6 overhead travelling cranes; 3 pressure testers; water- pressured machine for making tank dish cover; welding beads stress reliever; computers for business and graphic design 3 sets for each; stainless steel tube automatic welder and steel tube cutter each for 2 sets.

德制自动电离子切割焊接机组（直线焊接及圆周焊接机各一套）氩焊机12 台、电焊机4 台、点焊机1 台、CO2焊机3 台、油压机床2 台、电动卷圆机2 台、电动滚轮8 台、电动天车6 台、钻床3 台、试压机3 台、卫生桶制造专用水压成型设备壹套、焊道应力消除机1 台、业务用电脑及图面设计用电脑各3 套、不袗管自动焊接机及钢片切管机各2 套。

Based on Tseng-Lytton evaluation model for permanent deformation, and evaluation model for permanent deformation of clayed subgrade soils is established by improving and calibrating Tseng-Lytton model.

利用室内重复荷载三轴试验，研究了在含水量、压实度和偏应力影响下粘性路基土的永久变形特性，并以Tseng-Lytton路基土永久变形预估模型形式为基础，对Tseng-Lytton模型进行了改进和标定，建立了粘性路基土的永久变形预估模型；最后利用分层应变总和法，并结合一个典型粒料柔性基层沥青路面结构实例，计算了路基土的永久变形量。

Breath, muscle contraction of the buttocks; arch body, as far as possible to hold his head, right leg straight towards the ceiling (peg-leg knee in order to avoid muscle tension).

呼气，收缩臀部肌肉；拱起身体，尽量抬起头来，右腿伸直朝向天花板（膝微屈，以避免肌肉紧张）。

The cost of moving grain food products was unchanged from May, but year over year are up 8%.

粮食产品的运输费用与5月份相比没有变化，但却比去年同期高8％。