主应力英文

主应力迹线的概念：在梁的 xy 平面内可以绘制两组正交的曲线。一组曲线上每一点处切线的方向是该点处主应力 1 的方向，而另一组曲线上每一点处切线的方向是该点处主应力3 的方向,这样的曲线称为梁的主应力迹线 。

时间有限，先翻译了一点。1.A problem frequently encountered is that of determining the stresses in the vicinity of a notch or similar irregularity in the shape of a body . The irregularities in the body, such as holes, cracks ,or notches ,always induce an elastic stress near the irregularity which may be considerably greater than the nominal stress calculated from the lasds and the net cross sectional area of the body . In this case these local irregularities are of greatest interest.我们经常遇到的一个问题就是如何确定物体外形上凹痕或相似的不规则之处的张力大小。物体的不规则之处，比如孔洞，裂缝，凹槽，常常导致不规则之处出现弹性张力，而此张力被认为要远远大于物体净截区域测算到的公称应力。如此一来，这些局部的不规则就有非常大的研究价值。2.One example of this stress-concentrating effect of an irregularity is the effect of a small hole in a very large plate which is subjected to uniaxial tension .Since the surface of the hole must be stress free ,the stress in the vicinity of the hole must be modified from the uniaxial tension. The introduction of the stress-free hole does not change the resultant forces on the plate ,so that the effect of the hole should decrease with increasing distance from the hole . The solution to this problem is one of the many elastic solutions which are well known and may be found in many books on elasticity .In cylindrical coordinates ,the stress acting in a tangential direction at the edge of the hole is given by有关不规则张力效应的一个例子就是在一个非常巨大的受单轴向张力的平板上上，一个小孔产生的效应。由于孔洞表面不受力，小孔周边定会受单轴向张力影响发生改变。不受力孔洞的引入并不会改变平板所受的合力。所以孔洞效应会随着孔洞距离的增加逐步减弱。解决这个问题的方法就是众所周知的在很多弹力专业书上出现过的弹性解法。在柱面坐标中，孔洞边缘切线方向上作用的张力是来自于。。。（你的原文不完整了）

拼音：jìngxiàng英文：radial解释：沿半径的方向，垂直成Ⅰ字型（直行）。概念简介：沿直径或半径的直线方向，或垂直于轴的直线方向。在地表，通常指以某一点为中心点的切平面中，通过该点的直线的方向。在无线电导航中或无线电测量中，特指通过某一中心点（线）延展出来的磁力线方向。在字面上，“径向”是指“一直”。轴承术语：径向 英文：radial direction意思是在径向平面内通过轴心线的方向。在轴承术语中吗，通常有径向游隙，径向平面等。

In thisStatic earthpressre coefficient of geotechnical engineering K0 is a very important parameter, which is to determine the level of stress field and static earthpressre basis. Can correctly determine the coefficient of earth pressure at rest, to function in K0 soil retaining structures on the earth pressure distribution, project cost, safety and reliability have direct effect. Therefore, the domestic and overseas scholars had a lot of indoor and field tests, and puts forward several K0 static earthpressre coefficient calculation formula of the experience. The article mainly discusses silty static earthpressre coefficient of experimental research and verify the earthwork in JAKY formula powder main job has: suitability,Through under different confining pressures on the powder soil triaxial CU (cut) and drainage consolidation cut (CD) test, shear stress circle, Moore soil shear strength index internal friction Angle φ and cohesion of c and effective internal friction Angle, effective cohesion, research powder soil shear strength. Through comparison of CU in longitudinal shearing test data analysis, get along with confining pressure (3) increases, the Lord will stress (1-3) σ σ and pore water pressure u, size principal stress than 1/3 σ (σ) will also increase. Through the comparison, we found that horizontal consolidation drainage of shear index more accord with the actual shear strength.Through the stress path K0 triaxial test KO value. The principle of setting pressure increases around by measuring the incremental radial distortion, the principal stress control, to keep the radial distortion in certain error range. This test method is compared with the traditional triaxial compression test can more accurately measured values. KO Through the comparison between the experimental and JAKY formula powder in the aspects of applicable had some limitations.

径向应力是挤压应力的一种状态。挤压时塑性变形区内变形体单位截面上的应力状态，基本为三向压应力状态，即轴向压应力、周向压应力和径向压应力。正向挤压时，轴向压应力是由于挤压杆作用于金属上的压力和模子的反作用力产生的；径向压应力和周向压应力则是由于挤压筒和模孔的侧壁作用的压力产生的。挤压变形区内各点的主应力值是不相同的。挤压开始阶段的应力状态类似自由体镦粗；轴向主应力们在垫片上的分布是边部大、中心小。这是由于中心部分的金属正对着模孔，根据最小阻力定律可知其变形阻力最小，故所产生的主应力σ1也就最小。主应力σ1沿轴线上的分布由挤压垫片向模孔方向逐渐减小到模子出口处为零，径向主应力σr的分布规律与轴向主应力σ1相同。周向主应力σθ与径向主应力σr 之间的关系属于轴对称变形问题，即σθ≈σr 。实际上二者之间存在着一定的差值，其值由对称轴向表面处逐渐增大，并且其绝对值总是lσrl >lσθl 。在变形区的不同部位轴向主应力σ1与径向主应力σr 之间的关系也是不同的：在靠近挤压筒壁部位为lσ1 l>lσr l，而在对着模孔的部位，则lσ1 l

主应力的计算公式如下图所示：

主应力是指微区单元在某一点的剪应力为n=(n1,n2,n3)时的正应力。在这种情况下，n的方向称为力在这一点的主方向。微量元素的正应力点。

主应力是n = (n1, n2, n3)在一定点内的物体，其矢量在剪切应力的正应力的微区为零。在这一点，n方向应该是方向。一个小面积上的法向应力，当法向矢量n的大小改变时，是在向外推方向的。小应力张量σij(I,j = 1,2,3),主应力,一般有三种,它们满足的方程画画,三次方程的解是我主应力σ(I = 1、2、3)。对于一个给定的点应力张量的主应力坐标变换下是不变的。

参考链接：主应力-百度百科

Static earth pressure coefficient K0 is a geotechnical engineering in a very important parameter that determines the level of the venue of the stress state and calculation of static pressure on the basis of soil. The right to determine whether the static earth pressure coefficient K0, of the role of earth retaining structures in the earth pressure distribution, project cost, security and reliability have a direct impact on the degree. To this end, scholars at home and abroad to carry out a large number of indoor and field trials, and accordingly put forward a number of static earth pressure coefficient calculated empirical formula K0. This article focused on land-based powder static earth pressure coefficient, as well as the pilot study to verify the formula in the silt JAKY the application, the main work:Confining pressure in the different silt carried out on samples consolidated undrained triaxial shear (CU shear) and shear consolidation drainage (CD shear) tests, stress circle drawn Moore, Determination of soil shear strength friction angle φ , sticky cohesion c and effective internal friction angle and effective cohesion sticky to study the shear strength of silt. Comparison of vertical shear in the CU-Test-derived data analysis, has been with the confining pressure (σ3) increased, the main stress difference (σ1-σ3), pore water pressure u, the size of the main stress ratio (σ1/σ3) are increases. We have found through the horizontal comparison, the measured shear consolidation drainage indicators more in line with the actual soil shear strength.K0 triaxial stress path through the test measured the value of KO. The principle: the pressure increase around the settings incremental, by measuring the radial deformation, the main stress difference control so as to maintain the radial deformation to maintain a certain range of error. This test method compared to traditional triaxial shear test can be measured more accurately the value of KO. Through both experimental comparison, the silt JAKY formula applicable in a certain limitations. Static earth pressure coefficient of consolidation silt shear test Triaxial stress path triaxial tests K0JAKY formula

English Abstract Static earth pressure coefficient K0 is a geotechnical engineering in a very important parameter that determines the level of the venue of the stress state and calculation of static pressure on the basis of soil. The right to determine whether the static earth pressure coefficient K0, of the role of earth retaining structures in the earth pressure distribution, project cost, security and reliability have a direct impact on the degree. To this end, scholars at home and abroad to carry out a large number of indoor and field trials, and accordingly put forward a number of static earth pressure coefficient calculated empirical formula K0. This article focused on land-based powder static earth pressure coefficient, as well as the pilot study to verify the formula in the silt JAKY the application, the main work: Confining pressure in the different silt carried out on samples consolidated undrained triaxial shear (CU shear) and shear consolidation drainage (CD shear) tests, stress circle drawn Moore, Determination of soil shear strength friction angle φ , sticky cohesion c and effective internal friction angle and effective cohesion sticky to study the shear strength of silt. Comparison of vertical shear in the CU-Test-derived data analysis, has been with the confining pressure (σ3) increased, the main stress difference (σ1-σ3), pore water pressure u, the size of the main stress ratio (σ1/σ3) are increases. We have found through the horizontal comparison, the measured shear consolidation drainage indicators more in line with the actual soil shear strength. K0 triaxial stress path through the test measured the value of KO. The principle: the pressure increase around the settings incremental, by measuring the radial deformation, the main stress difference control so as to maintain the radial deformation to maintain a certain range of error. This test method compared to traditional triaxial shear test can be measured more accurately the value of KO. Through both experimental comparison, the silt JAKY formula applicable in a certain limitations. 谢谢, 请采纳!