正力

扰动气压梯度力在云的中上部为负力，它抑制了云的生长发展；在云的下部为正力，它使云向上的加速度增大。

The perturbation pressure force is negative in the middle-upper parts of cloud , which suprces the growth of cloud , and is positive in the lower part which promotes the cloud upward acceleration .

因此，产生最大正应力的方向就是相应于主应力的方向。

Thus the directions that emerge for extremizing the normal stress are the directions corresponding to the principal stresses .

孔隙水压σp降低了岩体断裂面上的正应力，使原处于稳定状态的断裂发生滑移破裂。

The pore-water pressure σ p reduces the mormal stress on the fissure of rock , hence causes sliding fracture which formerly remained in stable status .

颗粒Reynolds正应力轨道模型及后台阶两相流动数值模拟

Particles Reynolds Stresses Trajectory Model and Numerical Simulation for a Backward-facing Step Two-phase Flow

在相同C下，随焊缝宽度增大，裂尖前的正应力、三轴应力（拘束）和等效蠕变应变增大，相应的损伤程度增大，蠕变裂纹起裂时间变短。

And under the same C. with increasing the weld width , the principal stress , triaxial stress and creep strain will increase , and the damage will also increase too .

15天至30天标本，两组间差别有显著意义（P＜0.01）。并与弯曲正应力数值规律相一致。

In the 15 - day and 30 - day specimens , the difference between the two groups is significant ( P < 0.01 ), and is in agreement with the numerical rule of positive stress of bending .

在考虑粘结层影响的情况下给出了FRP板板端界面上剥离应力和正应力的解析表达式，分析了表达式中各物理量对界面应力的影响。

Taking the effect of adhesive layer into account , analytical formula of normal stress and shear stress at the interface are obtained and discussed .

在单向外载荷作用下，讨论两模型中正应力、VONMISES应力的分布规律。

The distributions of von Mises and direct stress directly leading to shear yield and interfacial debonding were discussed under uniaxial applied force .

以接触疲劳为基准，对因接触应力产生点蚀的接触点处的最大正应力σ（max）和最大剪应力τ（max）的计算，提供了方法。

Based on contact fatigue , a method provided is for calculating σ _ ( max ) and τ _ ( max ) at points of contact where pitting of surface is likely to emerger .

建立了一种LOM工艺的简化模型，通过对模型的分析，给出了零件层间正应力和切应力的计算公式。

A simplify model is proposed to describe the adhesive process and the calculation formulae of interlaminar stress are deduced by means of analyzing the model .

Hencky应力方程与主剪应力迹线上正应力方程的比较

The comparison between Hencky stress equation and normal stress equation along the tracing line of principal shear stress

借鉴预应力混凝土梁桥弯曲正应力计算方法，结合波形钢腹板PC组合箱梁桥的应力分布规律，给出了该类桥的弯曲正应力计算公式。

Borrowing ideas from the direct stress calculation of prestressed concrete beam bridge and combining the stress distributional regularity of prestressed concrete composite box-girder bridge with corrugated steel webs , this dissertation proposes the formula of bending direct stress calculation of this type of bridge .

合应力Sr中既包括了作用在断层面上的正应力，又包括了断层面上的剪应力，它比单独用一个应力描述应力场更有效。

The resultant stress includes not only the normal stress on the fault plane but also the shear stress on the fault plane , by which the description of stress field is more effective than by single stress .

这种止裂或滞后作用依赖于锯口的深度l和施于主断面上的正应力x。

The a stop-fracture effects depend on the depth of the saw kerf and average normal stress which exert on the saw cut representing the main fault .

宏观解理断裂应力σF是试样断裂时缺口前的最大正应力σyymax，其测定值主要由细观的σf决定，也不随加载速率、缺口尺寸和加载方式变化。

The macroscopic cleavage fracture stress F is the maximum normal stress ahead of a notch when the specimen is fractured , its measured value is determined by the local cleavage fracture stress of , and it is also independent on notch sizes , loading rate and loading methods .

文中引用Kelvin应力解求得了拉力型预应力锚索钢绞线侧壁、锚索孔壁剪应力τ沿轴向分布，求得了压力型预应力锚索孔壁剪应力τ及正应力σ沿轴向分布。

This paper refersed to Kelvin stress solution and gained the wall on pulling prestressed anchoring cable steel noose and shearing stress τ of the side panel , the paper also gained the shearing stress rand normal stress σ along axis of bore wall on compressing prestressed anchoring cable .

基于滑面正应力假设的土压力计算方法

Method for Computation of Earth Pressure Based on Normal Stress Assumption

钢筋桥联混凝土结构的韧带正应力计算

Calculation of the Ligament Normal Stress in Reinforced Concrete Structure

组合曲梁的径向应力及其对正应力的影响

Radial stress of combined curved beam and its influence on bending stress

智能仪表在直梁弯曲正应力实验中的应用

Application of Intelligent Instrument in Beam Bending Normal Stress Experiment

在计算断层面所受正应力时，仅考虑断块的垂向封闭性；

When normal stress is calculated , vertical sealability is considered only ;

滑面正应力分布对边坡安全系数的影响

Effect of normal stress distribution on factor of safety of a slope

实验表明辉长岩岩块在上述正应力下均发生粘滑现象。

Under these normal stresses in experiments on gabbro the stick-slip happened .

界面一点切向正应力的数值计算

Numerical method for the tangent stress at any given point of the interface

纤维复合材料复合型断裂正应力强度因子比准则

Normal stress intensity factor ratio criterion for mixed mode fracture of fiber composites

修正曲率及雷诺正应力对分离流的影响

Influence of curvature and normal stress on separating flows

横梁弯曲正应力计算机辅助测试系统

The CAT System of Normal Stress in Crossbeam Wind

圆孔蜂窝梁墩心截面正应力有限元分析与简化计算

FEA and Simplified Calculation for Normal Stresses at Mid-pier Sections of Circle-castellated Beams

纯弯曲正应力实验装置的改进

Improvement of Experimental Equipment of Pure Bending Normal Stress

实验的正应力为10&40MPa。

In experiments the normal stress were 10-10 MPa .