孔洞

The results show that heating at1500oC for 10 minutes in vacuum is the best brazing process. In the ceramic side none defects was observed at the interface of ceramic and solder, which leads to uniform brazing seam and excellent airtightness.

本文对单晶Al2O3/Pd/Nb焊接工艺、界面组织结构等进行了研究分析，结果表明在真空状态下，温度为1500℃，保温10分钟得到的焊缝均匀一致，没有任何的孔洞缺陷，气密性检测说明焊接情况良好。

In this work, the preparation of the nanopore arrays of anodic aluminum oxide substrates has been investigated.

本研究探讨了具奈米级孔洞阵列之阳极氧化铝基板之制作。

By means of plane elastic complex variable method and the theory of boundary value problems for analytic function, the stress distribution of elastic body is given in closed forms.

本文研究集中力作用下带任意孔洞的各向同性半平面焊接问题，利用复变函数方法和解析函数边值问题的理论，给出了弹性体应力分布封闭形式的解。

With aid of techniques of analytical continuation and conformal mapping, exact solutions are obtained for three typical problems concerning Eshelby's inclusion. The three problems are1 interaction between an arbitrarily shaped Eshelby inclusion and a circular inhomogeneity in transversely isotropic piezoelectric medium; 2 interaction between an arbitraily shaped Eshelby inclusion and an interface in anisotropic piezoelectric medium, the interface in our investigation may be a perfect interface, or a frictionless slipping interface , or a compliant electrode layer is embedded along the full interface of the bimaterials; 3 interaction between an arbitraily shaped Eshelby inclusion and an elliptical hole in anisotropic piezoelectric medium.

通过采用解析延拓和共形映射技术，获得了压电复合材料中有关Eshelby夹杂三个典型问题的精确弹性解答，即横观各向同性压电介质中任意形状的Eshelby夹杂与圆柱异相夹杂间相互作用；一般各向异性压电介质中任意形状的Eshelby夹杂与双压电材料所形成界面的相互作用，我们所考虑的界面包括理想界面、滑动界面以及柔性金属电极层增强界面；一般各向异性压电介质中任意形状的Eshelby夹杂与椭圆孔洞的相互作用。

The results show that: when the stress triaxiality is low, the penny-shaped crack can lead to damage anistropy of a ductile material; and the variance of Lodes parameter will lead to the variance of the expanding rate and deformed shape of penny-shaped crack and sphere-shaped void.

进而对材料中同时含有币形微裂纹和球形微孔洞的情形作了数值模拟分析。计算结果表明：币形微裂纹的存在将导致低应力三轴度下韧性材料破坏的细观损伤呈现明显的各向异性；而Lode参数对微裂纹和微孔洞的长大和变形状态具有较大的影响。

Combined with other data, the characters of fractures and vugs in Chegu 20 Buried-Hill carbonate reservoir are described correctly, and the reservoir distribution rule is summarized.

这里详细介绍了成像测井新技术裂缝识别、储层划分、裂缝参数计算、孔洞频谱分析等方法，并利用这些方法描述了车古20潜山碳酸盐岩储集层的裂缝，以及溶蚀孔洞发育特征，识别出了此潜山的储层，还结合其它资料，得出了该潜山油气藏的储层分布规律。

One dimensional shockwave code SSS was adapted to simulate the number density andporosity of incipient spalled OFHC Cu and pure Cu sample at the range of 10~4-10~5s~(-1). TheNAG model coefficients were acquired, the nucleation coefficient was sensitive with thepurity of sample.

采用一维冲击波程序SSS结合SRI-DFRACT模型模拟10~4-10~5s~(-1)加载应变率范围内无氧铜和工业纯铜中微孔洞数密度和孔隙度分布，由微孔洞分布相关参数与应变率的关系，确定了～10~5s~(-1)应变率下NAG模型参数，发现成核速率与材料纯度有关。

Exploring the rule of nucleation coefficients will be a possible wayapproach microvoids nucleation mechanism. OFHC Cu and pure Cu incipient spalled under～10~5s~(-1)strain rates electric gun driven twostage flyer impacts loading.

极高应变率下Cu、Al中微孔洞分布均表现为成核规律相关参数与应变率有关，探求不同应变率、不同材料参数加载下，NAG模型参数的变化规律是研究微孔洞成核机理和规律的可行方法。

The purpose of this paper is to explore whether the void size effect can influence plastic flow localization in ductile materials.

微孔洞的尺寸对于孔洞长大率的影响显著，研究了这种尺寸效应在延性材料的塑性流动局部化中的作用。

The results indicate that under all strain rates,the tensile strengths of two TRIP steels are slightly lower than that of two DP steels,and their elongations are much highe...

断裂试样的SEM观察表明，残余奥氏体的变形诱发相变显著延迟了TRIP钢的微孔洞的形成，持续抑制微孔洞的生长。

The split between the two groups can hardly be papered over.

这两个团体间的分歧难以掩饰。

This approach not only encourages a greater number of responses, but minimizes the likelihood of stale groupthink.

这种做法不仅鼓励了更多的反应，而且减少跟风的可能性。