主应力

The results showed that the thickness of dentin substrate can have some influence on peak value of Maximum principle stress (Variation 4%). The influence sensitivity decreased with the increase of dentin thickness.

结果发现模型中不同牙本质厚度会对粘结界面的最大主应力峰值产生一定水平的影响(变化范围4%)，其随厚度增大敏感度逐渐下降。

In main stress trace protraction , based on the character of main stress trace , propose an automatic method

研究了一种简便快速的主应力迹线自动化绘制方法。

A plastic model was proposed which develops from the combination of boundary surface theory and multi-shear mechanism plastic theory. This model avoids the uncertainty and complication associated with the revision of Mansing's rule when a multi-shear mechanism plastic model is used, and is able to simulate the rotation of principle stress axes during seismic activities and the large shear deformation during liquefaction.

将边界面理论和多重剪切机构塑性理论结合起来并加以改进建立了多重剪切机构边界面塑性模型，避免了多重剪切机构塑性模型通过修正系统修正曼辛准则时的不确定性、复杂性；且能模拟地震时主应力轴的偏转和液化时剪切大变形。

The experiment of measuring principle stresses at one point by the strain gauge method is a basic experiment in mechanics of materials.

测量一点的主应力的电测实验是材料力学实验中的基本实验。

Therefore, the effective angle of the internal friction and the failure criterion can be determined by a triaxial test.

然而，大量的试验结果表明，在平面应变条件下，中主应力对土的强度具有一定的增强作用。

Combining the fluid mechanics in porous medium and the geometry, the author considers the artificial barrier as a filter cake, research on the vadose rule on the condition of the coercibility and the non-Newtonian fluid flow, establish the formula of artificial barrier pressure drop and thickness, probe the formula of the thickness of artificial barrier for the pressure in the fracture,the coercibility, the smallest stress of barrier and the rheological property of fracturing fluid.

结合渗流力学和几何学，将人工隔层视为滤饼，在对人工隔层中渗流规律的研究中考虑了流体的非牛顿性和人工隔层的可压缩性，建立隔离层压降与厚度之间的关系式，探索人工隔层厚度与缝内压力、人工隔层可压缩性、上下隔层最小主应力、压裂液流变性等之间的关系。

At present, all the P-Y curve methods recommended by the referring code demand using geotechnic parameters C_u (three-axle undrained shear strength) and ε_50(the strain value that is equal to a half of the difference stress in the undrained triaxial compressing test). Moreover, we must do the complex and expensive triaxial geotechnic experiment to get those two geotechnic parameters, so they restrain the P-Y curve method from using comprehensively.

但目前国内外有关规范推荐的P-Y曲线均需用到土工参数C_u和ε_(50)(三轴不排水压缩试验中最大主应力差一半时的应变值)，而获得这两个参数需要进行比较复杂且费用较高的土工三轴试验，限制了P-Y曲线法的广泛应用。

Based on basic principle of nonlinear continuum mechanics, the amelioratedGudehus-Bauer hypoplastic model considering principal stress axes rotation is presented.

5基于非线性连续介质力学的基本原理，提出了一个考虑主应力轴旋转的改进的Gudehus-Bauer亚塑性模型。

The results show that the revised Gudehus-Bauer hypoplastic model can take strength and deformation of sand under principal stress axes rotation into consideration.

结果表明改进的Gudehus-Bauer亚塑性模型可以考虑主应力轴旋转对砂土强度和变形特性的影响。

The reason that Gudehus-Bauer hypoplastic model can not consider the effect ofmedium principal stress is analyzed by virtue of Gudehuss response envelope theory.

4借助于Gudehus提出的响应包络线理论，对Gudehus-Bauer亚塑性模型不能考虑中主应力影响进行了分析。

On the other hand, the more important thing is because the urban housing is a kind of heterogeneity products.

另一方面，更重要的是由于城市住房是一种异质性产品。

Climate histogram is the fall that collects place measure calm value, cent serves as cross axle for a few equal interval, the area that the frequency that the value appears according to place is accumulated and becomes will be determined inside each interval, discharge the graph that rise with post, also be called histogram.

气候直方图是将所收集的降水量测定值，分为几个相等的区间作为横轴，并将各区间内所测定值依所出现的次数累积而成的面积，用柱子排起来的图形，也叫做柱状图。