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Simulation of hard–soft material interaction under impact loading employing the material point method

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Science China(Technological Sciences) 2015年第4期58卷 763-768页

作者： LIU Han tao jiang Shan CHEN Zhen GAN Yong CHANG Jian Zhong WANG yan Hua TONG zhi Hui Laboratory of Energy & Environment and Computational Fluid Dynamics North University of China Department of Civil and Environmental Engineering University of Missouri School of Aeronautics and Astronautics Zhejiang University

Understanding the mechanisms of hard–soft material interaction under impact loading is important not only in the defense industry but also in daily ***,traditional mesh-based spatial discretization methods that are time consuming owing to the need for frequent re-meshing,such as the finite element method and finite difference method,can hardly handle large deformation involving failure evolution in a multi-phase interaction *** objective of this research is to develop a quasi-meshless particle method based on the material point method for the model-based simulation of the hard–soft material interaction *** demonstrate the proposed procedure,scenarios of a hard–soft material impact test are considered,where a force is applied to layers of materials and a hard bar with an initial velocity impacts a target with layers of different *** stress wave propagation and resulting failure evolution are simulated and compared with available *** research tasks are then discussed on the basis of the preliminary results.

关键词： material point method hard--soft materials impact quasi-meshless particle method

Br/Cl,I/Cl and chlorine isotopic compositions of pore water in shallow sediments：implications for the fluid sources in the Dongsha area,northern South China Sea

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Acta Oceanologica Sinica 2017年第4期36卷 31-36页

作者： LI yanping jiang Shaoyong yang tao Ministry of Education Key Laboratory for Coast and Island Development School of Geographic and Oceanographic Sciences Nanjing University Nanjing 210093 China State Key Laboratory for Mineral Deposits Research Department of Earth Sciences Nanjing University Nanjing 210093 China State Key Laboratory of Geological Processes and Mineral Resources Faculty of Earth Resources China University of Geosciences Wuhan 430074 China Collaborative Innovation Center of South China Sea Studies Nanjing 210093 China

The Dongsha area is one of the most promising target areas for gas hydrate exploration in the South China Sea（SCS）.The study of pore water geochemistry has played a key role in Chinese gas hydrate ***/Cl,I/Cl and δ37Cl in pore water were applied here in tracing gas hydrate occurrence,chemical evolution of pore fluids and water/rock interactions in low temperature sediment *** samples were collected from Sites HD255 PC and HD309 PC in the Dongsha area in *** Site HD255 PC,we found the elevated Br/Cl,I/Cl and decreased SO_4/Cl at the depth of 4–5 m,suggestive of a laterally migrated fluid probably generated from the gas hydrate *** range of δ37Cl is –0.54‰ to ＋0.96‰,and positive δ^（37）Cl at 4–5 m interval should be related with different diffusion rates between ^（35）Cl and ^（37）*** Site HD309 PC,a laterally migrated fluid was also found at the depth of 3–4 m,with the Br/Cl two times to that of the seawater and decreased I/Cl,indicating the fluid has no relationship with the gas *** this site,the chlorine isotopic composition varies from –0.7‰ to＋1.9‰.Extra high Br/Cl might relate with the deep generated *** higher temperature and pressure,the Br/Cl of the fluid is elevated during the hydrous silicate formation,while positive δ37Cl is also associated with the same mechanism.

关键词： halogen chlorine isotope pore water Dongsha area

Enhancing strength of an ultra-low-carbon weathering steel to 700 MPa by adjusting Ti content

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Journal of Iron and Steel Research International 2023年第12期30卷 2494-2504页

作者： Tian-en Peng zhi-wei Lian Yuan-yang Zhang Bo He Xue-wen Hu tao Zhu Bo jiang School of Materials Science and Engineering University of Science and Technology BeijingBeijing100083China Technical Center Ma’anshan Iron&Steel Co.Ltd.Ma’anshan243041AnhuiChina

The microstructure and mechanical properties of a traditional Ti-microalloyed weathering steel were analyzed,and the strength was improved by proposing an optimized Ti *** yield strength and elongation of the steel were 640 MPa and 25.5%,*** microstructure was ferrite and pearlite,and the average grain size was 5.4μ*** precipitates were mainly TiC with the size below 20 nm,and the average diameter was 18.2 *** yield strength of the newly proposed weathering steel with Ti content of 0.018%higher than that of the traditional steel reached up to 709 MPa,and the elongation was 23.5%.The ferrite grain was refined to 3.8μm,the fraction of TiC under 10 nm was obviously increased,and the average diameter of particles was 9.8 *** increase in Ti also promoted the recrystallization process,thus leading to the reduction in dislocation *** yield strength of the newly proposed weathering steel was increased to higher than 700 MPa by adjusting the Ti content mainly resulting from three aspects:grain refinement,precipitation and dislocation *** contributed values were 45,64 and–40 MPa,respectively.

关键词： Ti microalloying Weathering steel Microstructure Strength Plasticity

Furan-containing Conjugated Polymers for Organic Solar Cells

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Chinese Journal of Polymer Science 2017年第2期35卷 171-183页

作者： Amjad Islam zhi-yang Liu Rui-xiang Peng Wei-gang jiang tao Lei Wang Li Lei Zhang Rong-juan yang Qian Guan 葛子义 Ningbo Key Laboratory of Silicon and Organic Thin Film Optoelectronic Technologies Ningbo Institute of Materials Technology&EngineeringChinese Academy of SciencesNingbo 315201China University of Chinese Academy of Sciences Beijing 100049China

Development of organic semiconductors is one of the most intriguing and productive topics in material science and engineering. Many efforts have been made on the synthesis of aromatic building blocks such as benzene, thiophene and pyrrole due to the facile preparation accompanied by the intrinsic environmental stability and relatively efficient properties of the resulting polymers. In the past, furan has been less explored in this field because of its high oxidation potential. Recently, furan has attracted obsession due to its weaker aromaticity, the greater solubilities of furan-containing π-conjugated polymers relative to other benzenoid systems and the accessibility of furan-based starting materials from renewable resources. This review elaborates the advancements of organic photovoltaic polymers containing furan building blocks. The uniqueness and advantages of furan-containing building blocks in semiconducting materials are also discussed.

关键词： Conjugated polymers π-Electron Furan Semiconductors Organic solar cells

Intensity enhancement of Raman active and forbidden modes induced by naturally occurred hot spot at GaAs edge

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Chinese Physics B 2025年第1期34卷 180-187页

作者： tao Liu Miao-Ling Lin Da Meng Xin Cong Qiang Kan jiang-Bin Wu Ping-Heng Tan State Key Laboratory of Semiconductor Physics and Chip Technologies Institute of SemiconductorsChinese Academy of SciencesBeijing 100083China Center of Materials Science and Optoelectronics Engineering University of Chinese Academy of SciencesBeijing 100049China Key Laboratory of Optoelectronic Materials and Devices Institute of SemiconductorsChinese Academy of SciencesBeijing 100083China

Edge structures are ubiquitous in the processing and fabrication of various optoelectronic *** physical properties and enhanced light–matter interactions are anticipated to occur at crystal edges due to the broken spatial translational ***,the intensity of first-order Raman scattering at crystal edges has been rarely explored,although the mechanical stress and edge characteristics have been thoroughly studied by the Raman peak shift and the spectral features of the edge-related Raman ***,by taking Ga As crystal with a well-defined edge as an example,we reveal the intensity enhancement of Raman-active modes and the emergence of Raman-forbidden modes under specific polarization configurations at the *** is attributed to the presence of a hot spot at the edge due to the redistributed electromagnetic fields and electromagnetic wave propagations of incident laser and Raman signal near the edge,which are confirmed by the finite-difference time-domain ***-resolved Raman intensities of both Raman-active and Raman-forbidden modes near the edge are calculated based on the redistributed electromagnetic fields,which quantitatively reproduce the corresponding experimental *** findings offer new insights into the intensity enhancement of Raman scattering at crystal edges and present a new avenue to manipulate light–matter interactions of crystal by manufacturing various types of edges and to characterize the edge structures in photonic and optoelectronic devices.

关键词： polarized Raman spectroscopy edge enhanced Raman scattering spatial translational symmetry breaking electromagnetic field redistribution finite-difference time-domain simulation

Water modeling of molten steel flow in a multi-strand tundish with gas blowing

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International Journal of Minerals,Metallurgy and Materials 2010年第2期17卷 143-148页

作者： Jing jiang Jing-she Li Hua-jie Wu Shu-feng yang tao Li Hai-yan Tang School of Metallurgical and Ecological Engineering University of Science and Technology Beijing Beijing 100083 China Engineering Research Institute University of Science and Technology Beijing Beijing 100083 China

Fluid flow characteristics in a four-strand tundish with gas blowing were studied by water modeling *** is found that gas blowing can greatly improve the flow characteristics in the tundish with a turbulence *** dramatically increases the peak concentration time,and greatly decreases the dead volume,and reduces the minimum residence *** gas blowing location,gas flow rate,and porous plug area greatly influence the flow characteristics in the tundish; the gas blowing location near the baffle,smaller gas flow rate,and smaller porous plug area are better for improving the fluid flow *** gas blowing can reduce the difference of flows at the middle outlets and side outlets for the multi-strand *** produced by gas blowing can absorb small inclusions and provide the condition for inclusion collision and ***,introducing gas blowing into a tundish and combining the turbulence inhibitor can improve inclusion floating and removal,and the cleanness of molten steel can be advanced.

关键词： continuous casting tundish water modeling gas blowing porous plug

John Makeham, ed. Transforming Consciousness.＂ Yogacara Thought in Modern China （edited by jiang tao）

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Frontiers of Philosophy in China 2015年第3期10卷 510-516页

作者： jiang tao Rutgers University

John Makeham, a leading intellectual historian of modem China, has authored and edited several important works about the transformation of knowledge in modem Chinese history resulting from fierce interactions between China and the West as well as between modem and traditional China. His latest volume, Transforming Consciousness, is an example of the latter. In this anthology, Makeham assembles a group of specialists from Australia.

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翻译研究中“欧洲中心主义”的名与实

齐齐哈尔大学学报(哲学社会科学版) 2025年第1期 124-128页

作者：闫雪芹付江涛河南大学高级翻译学院河南开封450046

结合渥勒斯提出的“欧洲中心主义”在社会科学中的五种表现,从“翻译史的书写”、“翻译理论的时空分布”及“翻译理论的引用”三个维度,以约翰本杰明翻译学研究参考书目数据库和谷歌学术为数据来源,探究翻译研究中的“欧洲中心主义”... 详细信息

结合渥勒斯提出的“欧洲中心主义”在社会科学中的五种表现,从“翻译史的书写”、“翻译理论的时空分布”及“翻译理论的引用”三个维度,以约翰本杰明翻译学研究参考书目数据库和谷歌学术为数据来源,探究翻译研究中的“欧洲中心主义”问题。研究发现,与翻译史类专著编纂相比,高频翻译理论的时空分布及参考与引用方面体现出较为明显的“欧洲中心主义”,此处的“欧洲”更多的是一个文化而非地理概念;翻译理论的运用多“拿来主义”;去“欧洲中心主义”有赖于新的非欧洲背景的翻译理论的出现。

关键词：翻译研究欧洲中心主义翻译史翻译理论拿来主义

Synthesis of thorium sol for fabricating fuel kernels

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Nuclear Science and Techniques 2017年第7期28卷 53-58页

作者： Feng-Xia Wang Chao yan Chang-Qing Cao Peng Wang He Huang Hai-tao jiang Jun Lin zhi-Xuan Cheng zhi-Yong Zhu Shanghai University Shanghai 200444 China Shanghai Institute of Applied Physics Chinese Academy of Sciences Jiading Campus Shanghai Shanghai 201800 China

To fabricate thorium-based fuel kernel for solid fuel molten salt reactor,a component of tri-structural isotropic fuel particles is mostly based on sol-gel *** preparation of thorium sol is an important step for fabrication of thorium-based fuel kernels,such as thorium carbide and thorium *** gel quality affects the gel particle dispersion and the final *** this work,thorium sols were prepared using Th(NO_3)_4 and NH_3·H_2O by sol-gel *** effects of thorium concentration,mole ratio of NH_4^+/NO_3^- and reaction temperature on the pH,viscosity,turbidity,particle size and the thorium sol distribution were *** results show that the viscosity and turbidity increased with the NH_4^+/NO_3^- ratio;the turbidity and colloidal particle size increased with the reaction temperature,which affected little the sol viscosity;the sol viscosity increased with the thorium concentration,which virtually did not change the turbidity;and the particle size decreased and the size distribution narrowed with increasing thorium *** sol could be stored at room temperature for one day without significant property *** gel spheres of good quality were prepared at 60℃ with the NH_4^+/NO_3^- ratio of 75-85% and the thorium concentration of 1.2-1.4 mol/L.

关键词：溶胶-凝胶法固体燃料钍基制造合成凝胶颗粒反应温度燃料组件