principal stress

The minimum principal stress criteria adopted in the new model, compared with the minimum tangential stress criteria of traditional method, illustrates the mechanism during hydraulic fracturing procedure more objectively.

新的理论模型采用了最小主应力破坏准则，与现有方法采用的最小切向应力破坏准则相比，更客观的表述了水压致裂过程中的力学机制。

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The conclusion is that the size of terrestrial stress mainly is vertical principal stress maximum and the fracture of hydraulic fracturing is vertical.

最大水平主应力方向以近东西向为主，水力压裂裂缝的延伸方向也以近东西向为主；

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Separation of Principal Stress Fields of Non-uniform Region under the Concentrated Load

集中力处非均匀区主应力场的分离

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This article describes dynamic stress measurement of x-type of helicopter tail rotor tunnel test in several principal aspects.

本文介绍x型直升飞机尾桨吹风试验动应力测量工作的几个主要方面。

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The superiority jointing groups are determined and the direction of structural principal stress is got.

分析出优势节理组,得出构造主应力的方向.

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Study of bearing capacity of foundations considering both effects of intermediate principal stress and three-dimensional stress state

考虑中主应力及三向应力状态影响的地基承载力分析

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A New Method on Principal Stress Separation in Photoelasticity

光弹性分析中主应力分离的新方法

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Considering the effect of the angle of internal friction on the inclination of the sliding plane of soils behind retaining wall, the shape of the minor principal stress arch was theoretically analyzed.

考虑墙土摩擦角对挡土墙后土体滑裂面倾角的影响，对小主应力拱形状进行了理论分析。

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At the same time, from the basic theory of mechanics of materials, particularly expatiate the material secant stiffness of the principal strain direction and the principal stress direction and the element transformation matrix; they provide the theory basis of the procedure presented in this paper.

同时由材料力学出发详细推导了主应变或者主应力方向上的材料割线刚度、单元坐标转换矩阵，为本文程序的编制提供了理论基础。

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This paper deals with the function relations of principal stress and principal stain of a thin-walled cylinder varying with time, and the relations between the principal stain rate and the thickness of a thin-walled cylinder, as it is subjected to internal pressure.

给出了薄壁圆筒受内压时，主应力、主应变随时间变化的函数关系，以及主应变速率与圆筒壁厚的联系。

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The results show that the second principal stress and geological conditions have a certain impact on the plastic zone. 4.

研究结果显示，第二主应力和地质条件等对塑性区有一定的影响。

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Horizontal principal stress in the upper crust of China is due to the weight of the overburden rock beds themselves, the crustal temperature field as well as the compression of the plates.

地壳上部的水平主应力是上覆岩层自重、地壳温度场和板块挤压三种作用的结果。

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The major principal stress of oil field determined by AE and its relation to production

AE法油田最大主应力值的测量及其与油产关系

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Based on the experimental result, the influence of the maximum tensile stress and distortion energy density on brittle fracture and crack opening direction is analyzed by means of studying the field of distortion energy density and principal stress in the vicinity of a crack tip.

分析了裂纹尖端附近的形状改变能密度场和主应力场，结合试验数据研究了最大拉应力与形状改变比能对脆性断裂及断裂方向的影响。

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By using the results of tectonic analysis, focal mechanism solution and site geo stress survey we get the predominant distribution of principal stress of tectonic stress field in the Jianghan Dongting basin and its vicinal areas in four periods since Cenozoic.

利用构造分析结果、震源机制解和现场应力测量资料，获得江汉洞庭盆地及邻区新生代4个时段构造应力场主应力的优势分布。

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The more is principal stress deviator peak, the more possible is to emerge negative pore water pressure and to show more shear dilatation with high dry density.

干密度越大，主应力差峰值越大，表现出较大的剪胀性，孔隙水压力易出现负孔隙水压力；

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The direction of compressive principal stress is in NEE and the tensil stress is in NNW.

结果表明,应力场主压应力方向为NEE—SWW方向,主张应力为NNW—SSE方向.

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The calculation principle of earth pressure using principal stress arching is proposed.

给出了用主应力拱应力分析计算土压力的基本原理.

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The results show that the strain velocity mainly affects maximum principal stress.

研究结果表明,应变速率等因素对最大主应力的变化有一定影响.

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The stress strain relationship in different principal stress load direction can be reflected in the anisotropy of tangent elastic ratio or strain increment in load direction induced by unit stress increment in load direction.

不同主应力加荷向的应力应变关系各向异性可以反映在切线弹模以及加荷向单位应力增量引起的加荷向应变增量的差异中。

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High amount of Inventory principal adds to a company's financial stress and burden, but in order to provide good service quality to customers, an appropriate amount of Inventory is necessary.

高额的存货成本会对公司财务造成压力及负担，然而为提供顾客良好的服务品质，适量的存货却是必要的。

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In accordance with the orientation, northeast and north northeast, of principal compressive stress in North China, the dominant orientation of the fast S wave polarization is northeast before the earthquake.

震前快S波偏振优势取向为北东向，符合华北地区主压应力方向为北东向和北北东向的特征。

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A section of a metrical period in quantitative verse, consisting of two to six feet and in Latin verse having one principal accent. Italian words usually have the main stress on the penultimate syllable in the word.

言词的节奏单位，拉丁诗歌中从两个到六个音步中，含有一个主重音意大利语单词的主重音通常在倒数第二个音节上。

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The direction of the principal stress is generally northeastward, consistent with that of the regional stress field. Nevertheless, the direction of principal stress affected by local faulting is always different from the direction of regional structural stress field near the fault.

实测结果表明：最大主应力的方向总体上与区域构造应力场的方向基本一致，呈NE向，局部地区主应力的方向受局部断裂的影响而不同于区域应力场的方向。

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Calculation of the equivalent principal stress on a test point in two-dimensional stress field in structural strength experiment

结构强度试验中平面应力区测点相当应力的计算

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According to the wall testing process, we put finite element numerical simulation on the cavity wall which is set the ring beam but without structural concrete column, using discrete model to analysis the principal stress, cracks distribution and displacement of the wall.

参照墙体试验过程，对设置圈梁但无混凝土构造柱的空斗墙体进行有限元数值模拟，采用分离式模型对墙体的主应力、裂缝分布与墙顶位移变化进行分析。

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Calculation of in-situ three-dimensional principal stress using the oilfield development data

利用油田开发资料计算就地三向主应力

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Owing to the tectonic complexity of this region, the orientation of the principal compressional stress varies from west to east.

由于本地区构造的复杂性，由西至东主压应力的方向有所差异。

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The principal stress method is developed and the mechanical slab method is proposed.

发展了主应力法,提出了力学分块法.

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From the analysis, the degree of impact on model test by the earthquake is about 23.8% to the deflection and about 24.0% to the first principal stress and about 23.3% to the third principal stress.

由数值计算分析得到地震荷载对模型试验成果的影响程度：对变位的影响约为23.8%，对主拉应力的影响程度约为24.0%，对主压应力的影响程度约为23.3%。

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