| 1. | Magnetoresistance of la2 3sr1 3mno3 nife2o4 composites
4复合多晶材料的磁电阻效应 |
| 2. | Although some material scholars have made great progress in simulating polycrystalline solid grain growth by means of mc method
尽管一些材料研究者近年来运用montecarlo方法在模拟多晶材料晶粒生长方面取得了较大的进展。 |
| 3. | The templated grain growth ( tgg ) process was used to texture pmn - pt . the tgg process requires the template to have a strong epitaxial relationship to the crystal structure of the matrix composition
模板晶粒生长过程( templatedgraingrowth )可以使多晶材料形成择优取向的排列(即织构化) 。 |
| 4. | But polycrystalline cvd diamond films have rough and non - uniform thickness which can adversely affect their application . furthermore , it is difficulty to machining the cvd diamond thick - film
但是， cvd金刚石膜为多晶材料，表面为杂乱分布的晶粒的堆积，显露出明显的棱角，表面粗糙度大，后续加工比较困难。 |
| 5. | Simulating on polycrystalline cyclic deformation indicates that hardening first appears at grain boundary then spreads to grain inside . finally , hardening is not well - distributed in the specimen when deformation is limited
循环塑性模拟对于多晶材料的bauschinger效应和晶粒间硬化过程以及硬化在试样上的非均匀分布给出了相应的描述。 |
| 6. | In this dissertation , investigations were performed aiming at metallic polycrystals with medium grain size . numerical simulations and uniaxial tension tests were carried out to investigate the evolution of microstructure and mesoscopic viscoplastic behavior at elevated temperature
本文主要针对未经细化晶粒处理的金属多晶材料，试验和数值模拟相结合，研究高温变形中材料微结构演化及细观粘塑性力学行为。 |
| 7. | At the same time , the relationship between macro mechanical behavior and meso mechanism was investigated . polycrystalline structure was possessed by most engineering materials . under load the anisotropy of the constituent grains leads to strong inhomogeneities of stresses and strains on the grain level
基于相同的方法，建立随机取向晶粒集合形成的多晶有限元模型，对多晶材料的塑性行为和循环塑性行为进行研究，结果展现了多晶材料的弹性各向同性性质和塑性变形的局部化过程。 |
| 8. | The equivalent inclusion method is modified to include the geometrical and physical parameters of the ferroelectric inclusion units , and be expanded into piezo / ferro - electric media . the inclusion cell is the bridge of macro and micro mechanical - electrical responses , but also provides a direct relationship between meso / micro grain characteristic parameters and between globe macro performance , which could become a great help for the study on damage , fatigue and fracture mechanism of ferro - electrics
主要内容包括： ? ?建立基于铁电材料微结构的夹杂单元体的均匀化方法，不但将材料的宏、细观力电响应关系连接起来，而且将材料细微观结构的几何及材料特性与材料的宏观性能相统一，使对铁电多晶材料的损伤、疲劳及破坏等的研究更直接有效。 |
| 9. | The self - consistent method based on hill ' s theory is extended to be applicable to ferroelectrics . the introduction of global iteration and local iteration under loading of electric and / or stress fields calculate the nonlinear electromechanical coupling behavior . ( 3 ) the electro - mechanical coupling behavior of layer - structured ferroelectric composites is investigated and predicted
? ?通过采用基于hill理论的扩展的自洽计算方法，将其从一般多晶材料、复合材料的纯力学性能描述，扩展到具有力电耦合的复杂情况，建立其整体迭代和局部迭代的计算方法，得到铁电多晶材料的非线性力电耦合关系的描述。 |
