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On the basis of the achieved result and the effect of stress such as minor principal stress, intermediate principal stress, hydrostatic pressure, stress Lode degree, a generalized hyperbolic failure function adapted naturally with the envelope form of Mohr-Coulomb criterion is proposed for brittle rocks; and a smooth failure function acquired by Yu Maohong is also presented. Thus, a generalized polyaxial strain energy strength criterion is created.

在分析脆性岩石强度的静水压力、中间主应力、最小主应力以及应力Lode角等4种效应的基础上，提出子午面上与Mohr-Coulomb准则包络线自然衔接的广义双曲线型破坏函数及八面体偏平面上光滑角隅型破坏函数，从而建立非线性广义多轴应变能强度准则。

Based on the description of Mohr-Coulomb and Drucker-Prager yield criteria with invariant of stress, a formula for error estimation of unit strain energy between the two stress states is established in the deviatoric plane of the principal stress space, which satisfies M-C and D-P yield criteria respectively. A general procedure to transform M-C material parameters to D-P analysis parameters is obtained.

基于应变比能的概念，在偏平面内建立了分别进入Mohr-Coulomb和Drucker-Prager屈服面时所需形状改变比能的差值公式，获得M-C材料参数向D-P计算参数等效的统一性方案。

According to penetration mechanism of jacked pile, the expansion of a series of spherical cavities in semi-infinite space is used to simulate the process of pile installation; and soil is assumed as Mohr-Coulomb material.

根据静压桩的贯入机制，将沉桩过程模拟为半无限土体中一系列球形孔的连续扩张，土体假定为Mohr-Coulomb材料。

Hoek [13] suggested that the cohesive strength determined by fitting a tangent to the curvilinear Mohr envelope is an upper bound value and may give optimistic results in stability calculations.

Hoek认为由Mohr包络线的切线得到的黏聚力是一个上限值，对于边坡稳定可能会给出一个偏于安全的结果。

The mechanism of cohesion in the generation of ice rubble and ice ridging, the main factors arc demonstrated and analyzed elementarily. Considering three sea ice ridging process. the cohesion is set up as a function of initial ice thickness, total ice thickness, temperature and salinity, respectively. The theoretic expressions of sea ice cohesion were determined and to be introduced into the Mohr-Coulomb yield criterion.

考虑三种不同情况下的海冰堆积过程，将粘结力分别设为初始冰厚、当前堆积冰厚和海冰温盐的函数，分别建立了海冰粘结力的理论表达式，并将其应用到Mohr-Coulomb屈服准则中，建立了考虑粘结力影响的粘弹-塑性海冰动力学本构模型。

Measured the basic physical parameters of unsaturated soils in Three Gorges Reservoir area; 2 measured the initial sample matric suction using the unsaturated triaxial testing system, which can be used to evaluate the unsaturated soil strength and stress; 3 the drying and moisture absorption experiments were executed using the Tempe apparatus, and got the Soil-Water Characteristic Curve, permeability coefficients of every stress level were simulated according to the parameters from the SWCC; 4 the unsaturated soil strength tests were carried out using the GDS triaxial testing system, then got the Mohr circle and shear strength parameters; the results from different stress paths were compared; meanwhile, the axial strain-stress ratio-volume strain curve of different matric suction and different radial pressure was got, as well as their relationship; The research, which provided the necessary data and reference for Three Gorges Reservoir area geologic disaster, is the basic component of Three Gorges Reservoir geologic disaster prevention and research, and experimental results will be used directly in the project.

1量测了三峡库区非饱和土的基本物性参数； 2用非饱和土三轴试验仪量测了试样的初始基质吸力，为评估非饱和土的强度和应力水平提供参考； 3用Tempe仪和体积压力板仪进行了非饱和土的干燥和吸湿试验，得到了土-水特征曲线，并根据其参数拟合出各级吸力状态下对应的渗透系数； 4用GDS三轴仪进行了强度试验，得到了Mohr圆和抗剪强度参数；并比较分析了不同应力路径下试验结果；同时得到不同吸力和不同围压下轴向应变-应力比-体应变的关系曲线和其相互关系。该研究是三峡库区地质灾害防治研究工作的基础性工作，其结果将直接应用到工程实际中，为三峡库区地质灾害提供必要的数据和参考。

The two definitions of dilatancy in slip line theory are clarified, and the generalized Mises yield criterion matching Mohr-Coulomb yield criterion in plane strain condition is put forward where the effect of dilatancy can be considered.

阐明了滑移线场理论中有关剪胀的描述，推导了平面应变条件下考虑剪胀角影响并与Mohr-Coulomb准则精确匹配的广义Mises准则，研究了剪胀对浅基破坏模式的影响。

By making use of the model of Mohr-Coulomb and FLAC software, the thesis calculates the settlement curves for the old-new foundation as well as the embankment to which the gravity and external loads are applied.

本文旨在运用Mohr-Coulomb模型，依托Flac数值计算软件，计算了新老路基以及地基在自重作用和外部荷载作用下的沉降规律曲线。

Making use of ABAQUS, the finite element models are constructed of pile with straight shaft and pedestal pile, with soil modeled as Mohr-Coulomb, piles as elastic, and contact pair built between pile and soil.

利用ABAQUS软件建立等截面桩与扩底桩的有限元分析模型，土体用Mohr-Coulomb本构模型，桩体采用弹性模型，在桩土接触面间设立接触对。

The two-dimensional FLAC code of Version 3.3 is the main analysis tool used herein. The plane strain mode, Mohr-Coulomb material law, no water condition, large deformation mode, and gravity force field were assigned for all computation cases.

论文中以二维FLAC 3.3版程式作为分析工具，分析所采用之模式包含平面应变、Mohr-Coulomb组合律、不考虑水、大变型模式及在重力作用下模式等。

According to the clear water experiment, aeration performance of the new equipment is good with high total oxygen transfer coefficient and oxygen utilization ratio.

曝气设备的动力效率在叶轮转速为120rpm～150rpm时取得最大值，此时氧利用率和充氧能力也具有较高值。

The environmental stability of that world - including its crushing pressures and icy darkness - means that some of its most famous inhabitants have survived for eons as evolutionary throwbacks, their bodies undergoing little change.

稳定的海底环境─包括能把人压扁的压力和冰冷的黑暗─意谓海底某些最知名的栖居生物已以演化返祖的样态活了万世，形体几无变化。