微演化

氮化硅陶瓷烧结微结构演化的同步辐射CT实时研究

In Situ Observation of the Microstructure-evolution in Silicon Nitride Ceramics Sintering by Synchrotron Radiation X-ray Computed Tomography

主要内容和结论包括：1.采用分子动力学方法模拟镁单晶在c轴拉伸和压缩时不同温度下微观变形机制及微结构演化行为。

The main contents and results including : 1 . Molecular dynamics simulation is applied to investigate the microstructure evolution of magnesium single crystals under c-axis extension and compression at different temperatures .

Al-Zn-Mg-Cu-Li合金时效过程微结构演化的小角x射线散射研究

Small angle x-ray scattering study on microstructure evolution of the aging process of Al-Zn-Mg-Cu-Li alloy

作为SR-CT技术的应用，研究了泡沫铝材料在准静态压缩过程中的内部微结构演化及其相关的力学性能分析。

At last , the technique of SR-CT is applied to investigate the mechanical properties of aluminum foamed under quasi-static compression .

提出了描述非线性粘弹性材料微损伤演化的两类内变量，一类是描述粘性耗散的内变量，它服从Onsager原理；

Two kinds of intrinsic variable , the intrinsic variable of viscosity dissipation and that of damage dissipation , are introduced to express the dissipation in non linear viscoelastic materials .

转变，并析出过渡相。马氏体相变微结构演化过程的模拟与分析

Simulation and analysis of the microstructure evolution during martensitic phase transition

同时，对材料微结构演化所引发的材料的热性质的演化进行了考察。

The thermal properties correlated with the microstructure evolution are also investigated .

晶须增韧陶瓷的微裂纹演化及本构描述

Evolution of microcracks and constitutive relation in whisker toughened ceramic matrix composites

SiCp/ZL101AI复合材料中的层裂微损伤演化行为

Spalling damage evolution behavior of sicp / zl101al composite

较详细地分析了外载对三种典型微裂纹演化分叉的影响。

The evolution bifurcation of the three typical microcrack is more detailed analyzed .

岩石微裂纹演化的分岔混沌与自组织特征

Characteristics of bifurcation , chaos and self-organization of evolution of micro-cracks in rock

多孔泡沫铝压缩过程中微结构演化

Microstructure Evolution of Porous Foamed Aluminium in Compression

岩石破裂过程微裂纹演化规律有限元统计分析

Statistic Analysis of the Evolution Laws of Micro Cracks in Rock Failure Process by Finite Element Method

研究表明：裂尖微结构演化与裂尖弹性应变能密度分布密切相关。

The results indicate that the microstructure evolution at the crack tip is closely related with the elastic strain energy density distribution .

相关实验和原子尺度模拟的结果表明：裂纹扩展过程中裂尖微结构演化有多种形式，包括位错发射、孪晶形成以及裂尖相变等。

Experimental and atomistic simulation results show that the plastic deformation occurring at crack tip includes dislocation emission , twinning and phase transformation .

本文首先对不互溶纳米金属多层膜中由扩散引起的微结构演化进行了模拟，建立了较高温度下各向异性多层膜的微结构演化模型。

In this thesis , first of all , the microstructural evolution induced by the diffusion in the nano-multilayered thin metallic films with two immiscible phases is discussed .

针对共混/填充高聚物体系，总结了微损伤演化的基体规律，讨论了在考虑微损伤演化的情况下，材料体系的宏观本构关系研究的思路与主要研究成果。

This paper summarizes the damage evolution laws , the research methodology and the major results in the study of constitutive relations of blended / filled polymeric composite materials .

由此基于热激活机制，提出了同时依赖于应变率和应变的微损伤演化律，及相应的计及损伤弱化效应的率型本构关系。

Thus , based on the thermo-activation mechanism , a strain and strain-rate dependent damage evolution law and the corresponding rate-dependent constitutive relation taking account of damage evolution are proposed .

本文的研究从岩体宏细观的角度揭示了岩体宏观主裂缝扩展和延伸是岩体细观损伤劣化和微裂缝演化发展的物理内涵。

This paper from the rock micro-to-macro point of view shows that rock macroscopy major fracture extendibility and expandability are the physical connotation of rock microscopic damage deterioration and micro cracks evolution and development .

本文以淮河入海水道滨海枢纽工程混凝土抗侵蚀性研究为工程背景，对海水侵蚀条件下混凝土材料的微结构演化及宏观力学性能进行了研究。

This paper is from the research on corrosion resistance of concrete in Binhai hydra-junction , Huaihe River Project . The evolution of micro-structure and macro-mechanical performance of concrete in marine water erosion were studied .

应用统计理论的方法，结合微裂纹演化的微观机理，从梯度材料微观和细观结构出发推导出反映梯度材料断裂特性的宏观力学量。

Followed the discussions on the micro mechanism of the crack growth , the macro fracture parameters are obtained by applying the statistic theory . The parameter can reflect the micro - / meso-structure characteristics of C / M FGM .

并假设加载过程中，释放出的能量促使新的微裂纹演化，微裂纹以分岔-生长-再分岔生长模式形成，建立了任意压裂阶段微裂缝的增长数目和长度分岔损伤演化本构模型。

And it is assumed that in the process of loading release energy prompted new micro cracks evolution , micro crack is formed by the furcation-growth - furcation model , the constitutive model of micro cracks growing number and length bifurcation damage evolution at any fracturing stage is built up .

探讨了不同退火温度下Fe基非晶合金涂层微结构的演化机制，及其对涂层组织及性能的影响。

Furthermore , the microstructures evolution and the wear performance of the amorphous alloy coatings during annealed at different temperatures was discussed .

利用微观相场动力学模型模拟了Ni-Al-V合金沉淀有序相之间界面的微结构及其演化过程。

The microscopic structure and evolution of ordered interphase boundary of Ni-Al-V alloy was investigated using microscopic phase-field model .

通过对红砂岩细观单轴压缩试验，依据Geo-image程序对红砂岩细观结构图片量化处理信息，着重分析在不同含水率下红砂岩微裂纹损伤演化与宏观力学响应之间的规律。

Though uniaxial compression tests of meso - structure , the relations of macroscopic mechanics responses and micro-crack damage development of red sandstone are importantly analyzed by means of Geo-image programme .

三轴应力下黏性土的微结构及其演化规律

Microstructrue of Cohesive Soil under Triaxial Stress and Its Evolution Regularity

孔洞和微裂纹的演化是内连导线失效的主要起因。

The evolution of void and microcrack in the interconnect is the major source of the failure .

通过大理岩破裂实验，考察了典型构造中微裂纹的演化、集结的过程和特征。

The evolution , nucleation and characteristics of microcracks in typical tectonics are investigated in the experiment of fracture of marble specimen .

此振荡应该是试样内微裂纹分形演化至破坏过程的宏观表现。

These oscillations are considered to be the macro manifestations of the fractal processes corresponding to the microcracks evolution in the specimens .

微裂纹的演化不但与材料本身密切相关而且和许多外界环境相关，例如电场、磁场、应力场等。

The evolution of microcracks is related of many outside environment , such as electric field , magnetic field and stress field .