In order to study the influence of evolvement of permeation character induced by mesoscopic structural characteristics on macroscopic mechanical behavior and fracture mechanism , a nonlinear constitutive equations describing the relationship between damage of rock and seepage is proposed based on mesoscopic damage mechanics and biot seepage mechanics theory and coupling system of flow & solid in rock failure process analysis , f - rfpa2d , is developed to simulate the variation of permeability as well as coupling mechanism between seepage and stress during the initiation , propagation and coalescence of cracks in rock . this study also extends the research field of original rfpa2d 为了分析细观结构特性变化引起渗透性演化对宏观力学行为的影响,并进行渗流应力耦合作用下岩石破裂机制的研究,本文基于细观损伤力学和biot经典渗流力学,建立了岩体损伤非线性本构方程和渗透率关系模型,开发出岩石破裂过程渗流-应力耦合分析系统( couplingsystemofflow & solidinrockfailureprocessanalysis简称f - rfpa2d ) ,拓宽了原有程序rfpa2d的研究领域。
The structure of the deformation bands was observed and photographed by a microscope with a camera accessory . a user material mechanical behavior ( umat ) subroutine was developed based on the crystal plasticity model , and with it , the anisotropic elasto - viscoplastic behavior in single crystals was described . slip systems " evolution was simulated by using finite element method with the subroutine 本文使用数值模拟的方法对[ 001 ] 、 [ 011 ] 、 [ 111 ]以及偏轴加载的多种取向试样进行了拉伸试验模拟和循环模拟，研究了不同取向的试样在加载过程中滑移系的演化情况，并对试样的宏观力学行为和细观机理进行了评述。
Based on the theory of modern foundation soil science and unsaturated soil mechanics , the author has tried to combine microstructure properties with macro - mechanical behavior of soil consistently . the strength and deformation properties of high - saturated soil have been investigated , and the constitutive model of the tamped soil has been built . these have not been reported in related literatures available , and thus are the innovation of this paper 以现代土质学、非饱和土力学理论为指导，将土的微观结构特性与宏观力学行为有机结合起来，研究强夯后高饱和度地基土的强度和变形特性，建立高饱和度地基土的本构模型，国内外尚未见相关文献报导，这是本论文的创新之处。
The mechanical properties of carbon - phenolic depends on the properties of each phase in it , and is evidently influenced by the manufacturing progress , while micro - mechanics provides the way to calculate the macro - mechanical properties of composites according to the properties and geometries of each phase in it , this method was utilized to study the constitutive relation and the characteristic of stress wave propagating in carbon / phenolic composite in this paper , the main progress follows as : the solidification technique of phenol - formaldehyde resin ( pf resin ) had been studied , and then the specimens of solidified pf resin were prepared successfully for study on the constitutive relation of solidified pf resin 碳酚醛的力学性能与各相的力学性能及体积百分比相关，并受其制备工艺的影响很大，而细观力学是以基体和增强相的实测力学性能数据和两相之间的几何关系为依据来计算复合材料的宏观力学性能，因此，本文采用细观力学方法研究了碳酚醛的本构关系及应力波传播特性。主要进展如下：为了研究碳酚醛的基体材料? ?氨酚醛树脂的本构关系，完成了氨酚醛树脂的固化工艺研究，成功地制备了固化氨酚醛试件。
The proposed model - beam - particle model is validated to simulate some routine tests of concrete which including uniaxial compressive test and uniaxial tensile test to prove that the numerical model can effectively to describe the complete failure process caused by the initiation , propagation and coalescence of cracks . the influence of the meso - mechanical properties to the macroscopic failure behavior is discussed in this paper . the proposed model is employed to simulate the dynamic failure process of concrete under impact loading , and analyse the failure behavior of concrete with different impacting velocity 本文建立了混凝土的梁-颗粒数值模型，并利用该模型进行了混凝土在单轴压缩和拉伸载荷作用下，混凝土从微裂纹的萌生、扩展、贯通直到宏观裂纹产生导致破坏的全过程的数值模拟，探讨了混凝土材料细观结构对其宏观力学行为的影响；利用该数值模型，模拟了钢弹以一定的初始速率垂直侵彻混凝土圆板的动态过程，对计算结果进行了动画显示，并分析了不同钢弹初始速率对混凝土圆板破坏形式的影响。
During the operation of equipments in the modern industry , the interaction of fatigue - creep under complex condition is often the cause of the failure of equipments . for the other side , with the rapid development of science and technology , the study like this is booming , and the subject is becoming an integrated subject including macro - mechanics , metal microstructure and so on 现代石化行业中的设备在操作过程中，疲劳破坏以及材料的蠕变交互作用影响着设备的使用寿命；随着科学技术的飞速发展，疲劳-蠕变交互作用研究也已经成为宏观力学理论与金属微观结构学等综合为一体的新兴学科。
Based on the investigation of the effects of the formation process , the characteristic , adhesion and stress transfer of interface on its macroscopical mechanical properties and accurate characterization of the adhering conditions between the reinforcement and matrix , it is possible to achieve effective control of interface , which is the key to obtain high quality composite 而深入研究界面的形成过程、界面层性质、界面粘合、应力传递行为对宏观力学性能的影响规律，精确地表征增强相与基体之间界面结合的情况，利用定量化描述，进而有效进行控制，是获取高性能复合材料的关键。
The effect of the lateral pressure on maximum load - bearing capacity of rock block investigated numerically , the relations between lateral pressure and the maximum load - bearing capacity are acquired , the acoustic emission rules of rock block with the change of lateral pressure are found out , which is practially beneficial for the research on the macroscopic mechanical properties of rock mass 本文采用数值模拟方法研究了侧向压力对岩块极限承载能力的影响，得到了侧向压力与极限承载能力之间的函数关系，同时还找出了岩块声发射随著侧向压力的变化规律，这些问题的解决对于用数值模拟方法研究岩体工程的宏观力学性能无疑是很有意义的。
