不同构造区主应力方向存在一定的差异。
There are some differences of principal stress between secondary tectonic areas.
主应力迹线是代表主应力方向的曲线簇。
The principal stress traces represent the directions of principal stresses inside an object.
初裂缝是沿着最大水平主应力方向的垂直缝。
The beginning of crack is vertical along the orientation of maximum horizontal principal stress.
采用主应力法推导圆管扩径时扩径力的解析式。
The formula of tube expanding force is deduced using the slab method.
作者提出一种新的主应力迹线自动的绘制方法。
In this paper is presented an automatic way of drawing the lines.
不同主应力方向的破坏强度最大差别可达30%。
The maximUm difference of failure strength among various principal stress direction is up to 30%.
再结合最小主应力原理，确定重复压裂裂缝方位。
Integrating the minimum principal stress principle, the re-fracturing crack azimuth is determined.
研究了一种简便快速的主应力迹线自动化绘制方法。
To answer this question, we need to plot trajectories of principal stresses.
这些线所形成的网络与规则的主应力迹线族密切吻合。
The network of lines now conforms closely with a regular system of stress trajectories.
文章给出了一种判断平面应力状态主应力方向的简便方法。
In the article, a simple method is discussed to confirm the principal stress direction un-den the plane stress condition.
如果一个词有三个或更多的音节，有一个主应力和二次应力。
If a word has three or more syllables, there is a primary stress and a secondary stress.
阐述了一种新的解析法确定主应力方向的极为简便易行的方法。
A new simplified way is introduced that applies analytics to determine primary stress dimension in configuration.
本文分析、比较了由不同方法测得的华北地区最大水平主应力方向。
The measured maximum horizontal principal stress orientation in North China by different methods were compared in this paper.
结果：在对称性咬合，牙位的变化对各牙的根尖主应力方向无影响。
Results: the variation of tooth position gave no effects to the directions of principle stress around apex area in symmetrical occlusal type.
本文介绍了电阻应变片传感器及其主应力公式和在地震予报中的应用。
This paper describes the transducer of the resistance strain gauge, the formulas for its principal stress and the application of the earthquake prediction.
结果表明，主应力方向的连续旋转导致了钙质砂中孔隙水压力的增长。
It was showed that the continuous rotation of principal stress induced the development of pore water pressure in carbonate sand.
通过适当的设计，可以使晶粒流动方向与实际使用时的主应力方向一致。
With proper design, the grain flow can be oriented in the direction of principal stresses encountered in actual use.
统计分析表明：中间主应力一般可使最大主应力的强度极限增大30%。
The statistical analysis shows that the intermediate main stress can generally make the maximum main stress increase 30%.
主应力分离是光弹性应力分析的关键问题，但已往所用的方法都比较繁琐。
The key of photoelastical stress analysis is separating main stress, but the methods which we have used before are complicated.
取得了该区最大水平主应力、最小水平主应力量值及最大水平主应力方向。
The maximum and the minimum horizontal stresses and the direction of the maximum horizontal stress are obtained.
莫尔-库仑模式基于莫尔圆来判断最大和最小主应力平面上的破坏应力状态。
The Mohr-Coulomb model is based on plotting Mohr's circle for states of stress at failure in the plane of the maximum and minimum principal stresses.
明确加固梁具有两种不同破坏模式，其破坏是由钢板端部的主应力大小决定的。
Two different kinds of failure patterns have been observed and the failure of strengthened beam is attributed to the principal stress at the end of steel plate.
土的平面应变是岩土工程中常见的状态，其中零应变方向的主应力是十分复杂的。
Plane strain state is familiar in geotechnical engineering, and estimating the principal stress in the plane strain state is very complicated.
在泥岩段水平最大与最小主应力基本相等或相差甚小，在砂岩段才呈现较大差异。
Horizontal maximum and minimum principal stresses are nearly equal in shale formation, and very different in sand formation.
提出了主应力的偏角误差概念及其计算方法，使主应力方向的精度评定更加真实客观。
Precision estimation of principal direction is more objective by using principal stress deflection error proposed in this paper.
当一个主应力迹线通过一个各向同性点时，该符号会发生一个表面上的或虚假的改变。
An apparent or pseudo change in the sign occurs when a stress trajectory passes through an isotropic point.
粗加工中，增加磨削分力比可以增大磨削应力场中的主应力极值，有助于材料的脆性去除。
To increase component of grinding force ratio can increase principal stress extreme values in grinding stress field. Materials can be removed by brittle fracture.
在水平方向上，中国东部地壳的主应力方向为近东西向的压应力，但总体上是向东推移的。
The main horizontal stress in eastern China is the pressure near EW direction, but as a whole, the crust is moving east.
当高角度缝的走向与最大水平主应力的方向一致时，后期水平应力对原生裂缝有保持作用；
When the high-angle fracture has the same direction with the maximum horizontal stress, the subsequent horizontal stress will preserve the primary fracture.
当高角度缝的走向与最大水平主应力的方向一致时，后期水平应力对原生裂缝有保持作用；
When the high-angle fracture has the same direction with the maximum horizontal stress, the subsequent horizontal stress will preserve the primary fracture.
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