全文获取类型
收费全文 | 55篇 |
免费 | 21篇 |
国内免费 | 7篇 |
专业分类
航空 | 50篇 |
航天技术 | 8篇 |
综合类 | 11篇 |
航天 | 14篇 |
出版年
2023年 | 4篇 |
2022年 | 3篇 |
2021年 | 7篇 |
2020年 | 4篇 |
2019年 | 9篇 |
2018年 | 6篇 |
2017年 | 3篇 |
2016年 | 2篇 |
2015年 | 4篇 |
2014年 | 2篇 |
2013年 | 4篇 |
2012年 | 4篇 |
2011年 | 2篇 |
2010年 | 2篇 |
2009年 | 2篇 |
2008年 | 2篇 |
2007年 | 6篇 |
2006年 | 3篇 |
2005年 | 2篇 |
2004年 | 1篇 |
2003年 | 2篇 |
2002年 | 1篇 |
2001年 | 1篇 |
2000年 | 2篇 |
1999年 | 2篇 |
1998年 | 2篇 |
1997年 | 1篇 |
排序方式: 共有83条查询结果,搜索用时 93 毫秒
81.
为研究不同钝化工艺栅介质用SiO2薄膜的高能电子辐射缺陷特征,采用能量为1 MeV的高能电子在辐照注量为1×1015 e/cm2、5×1015 e/cm2和1×1016e/cm2下对三种不同钝化工艺(I,700 nm SiN + 500 nm PSG;II,1.2 μm SiN;III,700 nm PSG + 500 nm SiN)的SiO2薄膜进行了辐照试验。拉曼光谱和X射线光电子能谱结果表明I和III钝化工艺SiO2薄膜形成了非晶硅及双氧根离子,傅立叶红外光谱结果表明I钝化工艺SiO2薄膜形成缺陷结构未知的A1、A2、B1及B2缺陷;II钝化工艺SiO2薄膜形成A1、B1、及 缺陷;III钝化工艺SiO2薄膜形成A1、 及B2缺陷。 相似文献
82.
Automated Fiber Placement(AFP) technology facilitates the manufacturing process of composite structures with complex geometry owing to its high efficiency and accuracy.However,the unavoidable imperfections induced by the automated layup method bring challenges to the stability of the final mechanical properties of composites.The influence of AFP-induced gaps and overlaps on the mode Ⅱ interlaminar fracture process of oven-cured laminates is experimentally investigated and explicitly revealed.End... 相似文献
83.
《中国航空学报》2023,36(8):101-114
Full impact damage tolerance assessment requires the ability to properly mimic the repeated impact response and damage behaviour of composite materials using quasi-static approximations. To this aim, this paper reports an experimental investigation evaluating two quasi-static methods for mimicking repeated impact response and damage behaviour of Carbon Fibre Reinforced Polymer (CFRP) composite laminates. In this study, an 8.45-J single impact was repeated 225 times and mimicked with 225 times 6.51-J quasi-static (energy equivalent) indentations and with 225 quasi-static (force equivalent) indentations following the recorded impact peak force variation. Results show that the loading rate and the inertial effect are the two major factors affecting the responses of the composite laminates under out-of-plane concentrated loading. Both the energy- and force-equivalent quasi-static indentations failed to reproduce the impact responses greatly associated with high loading rate and inertial effect. The force-equivalent quasi-static indentations were performed in a semi-automatic way and induced damage states more similar to those of the repeated impacts than those of the energy-equivalent quasi-static indentations, whereas the latter can be better automated and has better reproducibility compared to that of the repeated impact responses, as it is less dependent on high loading rate and inertial effect. 相似文献