中国科学院机构知识库网格系统: 检索

Thermocapillarity transition-induced unconventional thermal behavior and dilution in laser welding of metals with dissimilar sulfur content 期刊论文 OAI收割
Materials Today Communications, 2024, 卷号: 38, 页码: 108314
作者: Zhiyong Li; Xiuli He; Shaoxia Li; Gang Yu; He XL(何秀丽)

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收藏 | 浏览/下载：18/0 | 提交时间：2024/03/15

Surface-active element, Numerical modelling, Heat transfer, Fluid flow, Mass transfer, Welding and joining

Sulfur-induced transitions of thermal behavior and flow dynamics in laser powder bed fusion of 316L powders 期刊论文 OAI收割
THERMAL SCIENCE AND ENGINEERING PROGRESS, 2023, 卷号: 45, 页码: 21
作者: Li ZY(李志永); He XL(何秀丽); Li SX(李少霞); Kan, Xinfeng; Yin, Yanjun

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收藏 | 浏览/下载：17/0 | 提交时间：2024/01/02

Melt pool dynamics Thermal behavior Fluid flow Surface-active element Laser powder bed fusion 3D printing and additive manufacturing

Role of Surface-Active Element Sulfur on Thermal Behavior, Driving Forces, Fluid Flow and Solute Dilution in Laser Linear Welding of Dissimilar Metals 期刊论文 OAI收割
MATERIALS, 2023, 卷号: 16, 期号: 7, 页码: 2609
作者: Shu Z(舒壮); Yu G(虞钢); Dong BX(董斌鑫); He XL(何秀丽); Li ZY(李志永)

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收藏 | 浏览/下载：23/0 | 提交时间：2023/06/15

Effect of Surface-Active Element Oxygen on Heat and Mass Transfer in Laser Welding of Dissimilar Metals: Numerical and Experimental Study 期刊论文 OAI收割
METALS, 2022, 卷号: 12, 期号: 4, 页码: 22
作者: Dong, Binxin; Li, Zhiyong; Yu, Gang; Li, Shaoxia; Tian, Chongxin

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收藏 | 浏览/下载：66/0 | 提交时间：2022/05/17

Surface-active element transport and its effect on liquid metal flow in laser-assisted additive manufacturing 期刊论文 OAI收割
INTERNATIONAL COMMUNICATIONS IN HEAT AND MASS TRANSFER, 2017, 卷号: 86, 页码: 206-214
作者: Gan ZT(甘正涛); Yu G(虞钢); He XL(何秀丽); Li SX(李少霞); Yu, G

收藏 | 浏览/下载：36/0 | 提交时间：2017/11/29

Additive Manufacturing Mass Transfer Surface-active Element Fluid Flow

Structural amelioration of 920 nm optically pumped semiconductor vertical external-cavity surface emitting laser (OPS-VECSEL) (EI CONFERENCE) 会议论文 OAI收割
2nd International Conference on Energy, Environment and Sustainable Development, EESD 2012, October 12, 2012 - October 14, 2012, Jilin, China
作者: Liu Y.; Liu Y.; Wang L.; Wang L.; Wang L.

收藏 | 浏览/下载：18/0 | 提交时间：2013/03/25

920 nm optically pumped semiconductor vertical external-cavity surface emitting laser (OPS-VECSEL) has an important application in laser display. We constructed and optimized a 920 nm OPS-VECSEL with active region of In0.09Ga0.91As quantum well (QW) system pumped by 808 nm laser diode module. By the finite element method self-consistent solutions of the semiconductor electronic and optical equations are realized to calculate the characteristics parameters of OPS-VECSEL. The performances of device especially the mode the threshold and the optical-optical translation efficiency were analyzed by dealing with different number of QWs (1 2 and 3) in one period QW depth barrier width the component and dimension of the non-absorption layer. We chose an improved structure of them. On this basis we ameliorated the number of QW periods and the simulation showed that in order to obtain high performance device the choice of the number of QW periods must be cautious. (2013) Trans Tech Publications Switzerland.

Heat and mass transfer in laser dissimilar welding of stainless steel and nickel 期刊论文 OAI收割
APPLIED SURFACE SCIENCE, 2012, 卷号: 258, 期号: 15, 页码: 5914-5922
作者: Hu YW(胡耀武); He XL(何秀丽); Yu G(虞钢); Ge ZF(葛志福); Zheng CY(郑彩云)

收藏 | 浏览/下载：37/0 | 提交时间：2013/01/18

Integrated modeling analysis of a novel hexapod and its application in active surface 会议论文 OAI收割
Kiruna, Sweden, 2011-8-17
作者: Dehua Yang; Guoping Li; Guohua Zhou; Hui Li

收藏 | 浏览/下载：27/0 | 提交时间：2014/01/07

Integrated modeling hexapod kinematics finite element method telescope panel support active surface

Study on a novel panel support concept for radio telescopes with active surface 会议论文 OAI收割
San Diego, California, USA, 2010-6-27
作者: Dehua Yang; Guoping Li; Jingquan Cheng; Guohua Zhou

收藏 | 浏览/下载：42/0 | 提交时间：2014/01/05

Radio telescope panel support active surface master-slave concept swaying-arm mechanism finite element analysis

Support technique of ultra thin mirror in space optics (EI CONFERENCE) 会议论文 OAI收割
2nd International Symposium on Advanced Optical Manufacturing and Testing Technologies: Large Mirrors and Telescopes, November 2, 2005 - November 5, 2005, Xian, China
作者: Ren J.-Y.; Gao M.-H.

收藏 | 浏览/下载：31/0 | 提交时间：2013/03/25

With the development of space optical system the technique of ultra thin mirror come forth and is paid more attention because of less difficulty in machining low cost lightweight no disassembly during detecting and maintaining. The key technique takes advantage of deformation of ultra thin mirror as the influence of environment to adjust the surface figure. Its accuracy meets requirement. An analysis method is based on finite element analysis (FEA) and many items including the amount of support points the way of arrangement the optimum design of support component are studied. The finite element method was used to analyze the mirror and some different mirror support schemes. The principal aim of the mirror analysis is to get numbers of support points and the ways of the support. There are three schemes including 12-6-1 12-8-1 and 16-8-1 models. Deformation of deadweight is calculated under the three conditions. The way of 16-8-1 is more suitable than the designs of other two. The support subassembly is amended to meet with the mirror surface RMS in the range of 30m. Deformation of the mirror with support structure has been calculated. The result is 16.52nm lower than a quarter of the wavelength which indicates the feasibility of the support scheme applied to mirror. Theoretical result for the best way of support is presented. The result of analysis shows that requirement surface figure could be met through adjusting support points. It predicts feasibility of the support technique and provides theoretical value for active adjustment in the laboratory. At present support and adjusting experiment of ultra thin mirror is being carried on.