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Damage and progressive failure of concrete structures using non-local peridynamic modeling

Science china(Technological Sciences) 2011年第3期54卷 591-596页

作者： huang dan1,2. zhang qing1,2.& QIAO PiZhong1,{2., hohai university, nanjing 2.0098, china 2.Department of engineering Mechanics, hohai university, nanjing 2.0098, china 3 Department of Civil and Environmental engineering, Washington state {12., Pullman, WA 99164-2.10, USA 1. state key {2. of {2.-water resources and hydraulic engineering Hohai University Nanjing 210098 China2. Department of Engineering Mechanics Hohai University Nanjing 210098 China3. Department of Civil and Environmental Engineering Washington State University Pullman WA 99164-2910 USA

Peridynamics (PD), a recently developed theory of solid mechanics, which employs a non-local model of force interaction and makes use of integral formulation rather than the spatial partial differential equations used in the classical continuum mechanics theory, has shown effectiveness and promise in solving discontinuous problems at both macro and micro scales. In this paper, the peridynamics theory is used to analyze damage and progressive failure of concrete structures. A non-local peridynamic model for a rectangular concrete plate is developed, and a central pairwise force function is introduced to describe the interior interactions between particles within some definite distance. Damage initiation, evolution and crack propagation in the concrete model subject to in-plane uni-axial tension, in-plane uni-axial compression and out-of-plane impact load are investigated respectively. The numerical results show that discontinuities appear and grow spontaneously as part of the solution to the peridynamic equations of motion, and no special failure criteria or re-meshing techniques are required, which proves the potential of peridynamic modeling as a promising technique for analyzing the progressive failure of concrete materials and structures.

关键词： concrete damage progressive failure peridynamic model discontinuities

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MOF and its derivative materials modified lithium-sulfur battery separator:a new means to improve performance

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Rare Metals 2024年第6期43卷 2418-2443页

作者： Rong-Wei huang Yong-Qi Wang dan You Wen-Hao Yang Bin-Nan Deng Fei Wang Yue-Jin Zeng Yi-Yong {2. Xue Li National Local Joint engineering Research Center for Lithium-Ion Batteries and Materials Preparation Technology Key Laboratory of Advanced Batteries Materials of Yunnan ProvinceFaculty of Metallurgical and Energy EngineeringKunming University of Science and TechnologyKunming 650093China state key {2. of Physical Chemistry of Solid Surfaces Collaborative Innovation Centre of Chemistry for Energy MaterialsState-Province Joint Engineering Laboratory of Power Source Technology for New Energy VehicleEngineering Research Center of Electrochemical TechnologyMinistry of EducationCollege of Chemistry and Chemical EngineeringXiamen UniversityXiamen 361005China

In recent years,lithium-sulfur batteries(LSBs)are considered as one of the most promising new generation energies with the advantages of high theoretical speeific capacity of sulfur(1675 mAh·g^(-1)),abundant sulfur resources,and environmental friendliness storage technologies,and they are receiving wide attention from the ***,the problems of the shuttle effect and lithium dendrite growth in LSBs have limited their practical application,so there is a need to find ways to solve these *** is an excellent choice to use novel materials to modify battery *** those novel materials,the metal-organic framework(MOF)has the properties of regular pores and controllable *** applied as a positive electrode and diaphragm,it can restrain the shuttle effect and lithium dendrite growth,especially since it shows excellent performance in diaphragm ***,various design strategies and synthesis methods of MOF-modified separators are reviewed in this paper,and the applications of MOF in LSBs separators in different forms are introduced,including the composite of MOF and carbon-based materials,the compounding of MOF and polymer,self-carbonization to form MOF-derived *** the same time,different characterization techniques are systematically reviewed to obtain the physical and chemical properties of MOF particles and the working mechanism of MOF-modified diaphragm,which provides a basis for further research in this ***,some future research trends and directions are put forward to fully tap the future commercial potential of MOF-modified diaphragm in LSBs.

关键词： MOF Lithium-sulfur battery Modified diaphragms Design strategies Prospect Characterization

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坞首大体积混凝土温控仿真分析

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水电能源科学 2011年第4期29卷 105-107页

作者：李小奇吴丹张伟河海大学水文水资源与水利工程科学国家重点实验室江苏南京210098 河海大学水资源高效利用与工程安全国家工程研究中心江苏南京210098 河海大学水利水电学院江苏南京210098

采用1~7 d不同浇筑方案,基于热传导方程和应力增量方程,采用HyperMesh建立坞首模型,利用ABAQUS分析计算了浇筑0~90 d的坞首底板和台墩温度场与应力,并做出了温度场和应力曲线寻找最易开裂区域和时间,给出解决办法并确定了最优方案。

关键词：大体积混凝土有限元温度场温度应力仿真分析

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宜昌站主汛期流量及水温变化多时间尺度分析

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水电能源科学 2010年第4期28卷 16-18页

作者：黄峰夏自强张楠河海大学水文水资源与水利工程科学国家重点实验室江苏南京210098 河海大学水文水资源学院江苏南京210098

以宜昌站1956-2.02.主汛期为例，采用复Morlet小波分析了流量、水温序列多时间尺度变化规律，并根据主周期预测了未来变化趋势。结果表明，主汛期流量、水温序列均存在三类时间尺度的周期，各周期尺度下小波变换系数基本为正负对应出... 详细信息

以宜昌站1956-2.02.主汛期为例，采用复Morlet小波分析了流量、水温序列多时间尺度变化规律，并根据主周期预测了未来变化趋势。结果表明，主汛期流量、水温序列均存在三类时间尺度的周期，各周期尺度下小波变换系数基本为正负对应出现，呈偏丰—偏低、偏枯—偏高交替变化规律，且将持续到2.15年。

关键词：宜昌站主汛期流量水温变化多时间尺度

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某水电站边坡雾雨作用下三维稳定性分析

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水电能源科学 2011年第6期29卷 116-119,194页

作者：张伯涛荣冠黄凯邓云瑞钱晓慧武汉大学水资源与水电工程科学国家重点实验室湖北武汉430072 武汉大学水工岩石力学教育部重点实验室湖北武汉430072

分析了金沙江某水电站坝址区工程地质条件,确定了左岸泄洪雾化区边坡的稳定性控制边界条件及潜在滑动块体,基于泄洪雾化区地形图构建了边坡三维模型,在泄洪雾化区边坡三维饱和非饱和渗流场计算的基础上考虑了非饱和孔隙水压力对结构面... 详细信息

分析了金沙江某水电站坝址区工程地质条件,确定了左岸泄洪雾化区边坡的稳定性控制边界条件及潜在滑动块体,基于泄洪雾化区地形图构建了边坡三维模型,在泄洪雾化区边坡三维饱和非饱和渗流场计算的基础上考虑了非饱和孔隙水压力对结构面强度的影响,并计算了一次典型泄洪雾化降雨过程中边坡滑体的动态安全系数。计算结果表明,该方法可为雾化区边坡渗流控制和边坡加固设计提供参考。

关键词：三维极限平衡边坡稳定性降雨入渗饱和非饱和渗流

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无酸活化剂SY-1对含锡硫化矿浮选脱硫的试验研究

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有色金属工程 2024年第4期14卷 121-128页

作者：王靖崔毅琦张宇黄丹张洋闫增达童雄昆明理工大学国土资源工程学院昆明650093 省部共建复杂有色金属资源清洁利用国家重点实验室昆明650093 金属矿尾矿资源绿色综合利用国家地方联合工程研究中心昆明650093

对云南文山地区含锡硫化矿进行了工艺矿物学分析和浮选脱硫试验研究。含锡硫化矿中锡和硫的品位分别为0.31%和2.58%,锡主要赋存于锡石中,硫主要以磁黄铁矿形式存在。在无酸活化剂SY-1用量2.0 g/t、丁基黄药(BX)用量150 g/t、松醇油用量4... 详细信息

对云南文山地区含锡硫化矿进行了工艺矿物学分析和浮选脱硫试验研究。含锡硫化矿中锡和硫的品位分别为0.31%和2.58%,锡主要赋存于锡石中,硫主要以磁黄铁矿形式存在。在无酸活化剂SY-1用量2.0 g/t、丁基黄药(BX)用量150 g/t、松醇油用量40 g/t的条件下,经“一粗二精二扫”的浮选闭路试验,可获得精矿硫品位2..38%、硫脱除率92.18%、锡损失率9.2.%的良好浮选指标,为后续锡石的高效回收创造条件。

关键词：浮选脱硫无酸活化磁黄铁矿含锡硫化矿

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Status of aquatic organisms resources and their environments in Yangtze River system(2.17-2.2.)⋆

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Aquaculture and Fisheries 2024年第5期9卷 833-850页

作者： Haile Yang Li Shen Yongfeng He Huiwu Tian Lei Gao Jinming Wu Zhigang Mei Nian Wei Lin Wang Tingbing Zhu Feifei Hu Jinling Gong Hongchun Du Xinbin Duan Huatang Deng Daoqun Wang Fengyue Zhu Yunfeng Li Fan Wu Huijun Ru Yan zhang Junyi Li Junlin Yang Yuntao Zhou Dongdong Fang Yinping Wang dan{2. Lin Yanping Yang Peijie Li Silei Liu Jian Yang Ping Z{2. Sikai Wang Tao zhang Gang Yang Wenbo Yang Lilai Yuan Kun Cao Shuo Xu Huiyuan Liu Zhiqiang Liang Chongrui Wang Hong Li Xiping Yuan Xin Yang Yilong Fu Yanping zhang Haixin zhang Zhiying Tao Sheng Wang Xiaoping Gao Binsong Jin Kemao Li Guojie Wang Shenglong Jian Yingqin Li Chenjiang Xue Chunyun Lei Shaowei Xue Yi Sun Bin Zhu Ke Shao Xingkun Hu Meihua Xiong Jun Du Bin He Tao Yan Yingying {2. Yuanchao Zou Biwen Xie Yongming Wang Bin Li Fei Liu Yaoyao zhang Fei Fan Zhijian Wang Jing {2. Haoran Gu Hailong Ge Yan dan Yan Li Shuqiao Wang C{2. zhang Lu Zhou Xue Wang Sheng Zeng Yan Xiang Xugang He Jianhui Qin Chengxing Xia Jie Hou Yifu Shi Lifang Gao Zhiqiang Zhu Hongbao Shen Yun Du Xuejun Duan Jiawu Xiong Deguo Yang Shaoping Liu Zhaohui Ni Hui zhang Kai Liu Feng Zhao Yingren Li Jianwei Wang Qiwei Wei Yangtze River Fisheries Research Institute Chinese Academy of Fishery SciencesWuhan430223China Institute of Hydrobiology Chinese Academy of SciencesWuhan430072China Fishery Resource and Environment Research Center Chinese Academy of Fishery SciencesBeijing100141China key laboratory of Fresh{2. Fisheries and Germplasm {2. Utilization Ministry of Agriculture and Rural AffairsFreshwater Fisheries Research CenterChinese Academy of Fishery SciencesWuxi214081China East china Sea Fisheries Research Institute Chinese Academy of Fishery SciencesShanghai200090China Institute of Fisheries engineering Chinese Academy of Fishery SciencesBeijing100141China Hunan Fisheries Science Institute Changsha410153China Jiangxi Fisheries Research Institute Nanchang330039China Jiujiang Academy of Fishery Sciences Jiujiang332000China School of Life Sciences Nanchang UniversityNanchang330031China qinghai Provincial Fishery Technology Extension Center Xining810012China Yunnan Academy of Fishery Sciences Kunming650111China Institute of Hydroecology Ministry of Water Resources and Chinese Academy of SciencesWuhan430079China Fisheries Institute Sichuan Academy of Agricultural SciencesChengdu611731China School of Life Sciences Neijiang Normal UniversityNeijiang641100China School of Life Sciences Southwest UniversityChongqing400715China Chongqing Fishery Sciences Research Institute Chongqing401120China Guizhou Fisheries Research Institute Guiyang550025China College of Fisheries Huazhong Agricultural UniversityWuhan430072China Hubei Fisheries Science Research Institute Wuhan430070China Shaanxi Fisheries Research Institute Xi’an710086China Innovation Academy for Precision Measurement Science and Technology Chinese Academy of SciencesWuhan430077China nanjing Institute of Geography and Limnology Chinese Academy of SciencesNanjing210008China Central South Inventory and Planning Institute of state Forestry and Grassland Administration Changsha410014China

The Yangtze River is the mother river of *** promote the aquatic ecosystem protection of the great river,the Project of Yangtze Fisheries resources and Environment Investigation(2.17-2.2.)supported by the Ministry of Agriculture and Rural Affairs,*** carried out by 2. institutes and universities that located in the Yangtze River basin surveys the status of(1)fish species composition and spatial distribution,(2.current fish abundance,(3)endangered fishes,(4)Yangtze finless porpoise,(5)aquatic eco-environments,(6)water-level fluctuation areas,(7)capture fisheries and recreational fisheries of the Yangtze River mainstream and 10 of its main tributaries,including Yalong River,Heng River,Min River(including Dadu River),Chishui River,Tuo River,Jialing River,Wu River,Han River,Dongting Lake and Poyang *** results showed that there were 443 fish species(belonging to 163 genus,37 families,and 18 orders)before 2.17,but only 32. fish species(including 15 new recorded exotic species)were recorded in the project of *** them,Cyprinus carpio,Carassius auratus,Hypophthalmichthys molitrix,Pelteobagrus fulvidraco,Coilia brachygnathus,Silurus asotus,Saurogobio dabryi,Ctenopharyngodon idellus,Pelteobagrus nitidus,Hemiculter leucisculus,Siniperca chuatsi,Coreius heterodon,Culter alburnus,Parabramis pekinensis,and Aristichthys nobilis were the dominant species across the whole Yangtze River *** is estimated that there were 886 million individuals weighing 12..8 million kg,merely equivalent to 2..3%of the resources in 1950s,30.9%of the resources in 1960s,or 58.7%of the resources in *** the new list of protected fishes that recorded in the Yangtze River system,only 15 of 2. were collected in this project of *** gladius has been affirmed to be Extinct by International Union for Conservation of Nature(IUCN).The wild individuals of Tenualosa reevesii and Luciobrama macrocephalus have disappeared for many years and maybe have been extinct

关键词： Fishes Yangtze finless porpoise resources Aquatic ecosystem Fisheries Background investigation Yangtze river system

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城市化对降水影响的研究综述

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水科学进展 2018年第1期29卷 138-150页

作者：胡庆芳张建云王银堂黄勇刘勇李伶杰南京水利科学研究院水文水资源与水利工程科学国家重点实验室江苏南京210029 安徽省气象科学研究所安徽省大气科学与卫星遥感重点实验室安徽合肥230031

通过长期研究,关于城市化会对局地降水产生一定影响已成为共识,但由于不同地区降水形成、分布机制的复杂性以及气象观测资料、数值天气模式的局限性,目前国际上对于城市化影响降水的物理机制及驱动因素仍存在不同认识,关于不同条件下城... 详细信息

通过长期研究,关于城市化会对局地降水产生一定影响已成为共识,但由于不同地区降水形成、分布机制的复杂性以及气象观测资料、数值天气模式的局限性,目前国际上对于城市化影响降水的物理机制及驱动因素仍存在不同认识,关于不同条件下城市化对降水影响的具体规律也具有争议。在阐述城市化对降水影响的主要物理机制的基础上,从站点资料解析和综合遥感资料解析两方面归纳和比较了近年城市化对降水影响的主要资料检测事实,总结了关于城市化单一因素和综合因素对降水影响的数值模拟试验的主要结论,最后从城市综合气象观测试验、城市化降水效应的系统检测、城市化降水效应的精细化模拟、城市化降水效应的区域影响、城市化降水效应的适应与调控5个方面,论述了存在的主要问题及发展方向,为深化对城市化降水效应的科学认识以及应对其不利影响提供了参考。

关键词：城市化降水影响机制资料检测数值模拟适应与调控

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Compressible and Lightweight MXene/Carbon Nanofiber Aerogel with “Layer‑Strut” Bracing Microscopic Architecture for Efficient Energy Storage

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Advanced Fiber Materials 2022年第4期4卷 820-831页

作者： Yongpeng Liu dan Wang Chao zhang Yan Zhao Piming Ma Weifu Dong Yunpeng {2. Tianxi Liu School of Chemical and Material engineering Ministry of EducationJiangnan UniversityWuxi 214122China state key {2. for Modification of Chemical Fibers and Polymer Materials College of Materials Science and EngineeringDonghua UniversityShanghai 201620China School of resources Environment and MaterialsGuangxi UniversityNanning 530004China

Two-dimensional MXene has recently captured widespread research attention in energy storage and conversion fields due to its high conductivity,large specific surface area,and remarkable ***,its performance is still hindered by severe self-restacking of MXene ***,conductive Ti_(3)C_(2.T_(x)/carbon nanofiber(CNF)composite aerogel with typical“layer-strut”bracing 3D microscopic architecture has been fabricated via synergistic assembly and freeze-drying *** virtu of the strong interfacial interaction between polymeric precursor nanofibers and MXene mono-layers,gelation capability and 3D formability of Ti_(3)C_(2.T_(x) is greatly reinforced,as resulted Ti_(3)C_(2.T_(x)/CNF aerogels possess a highly ordered microporous structure with interlayered CNF penetrating between large size MXene *** special configuration guarantees the stability and pliability of the composite ***,the 3D form interconnected conductive network and the parallell alignment of the pores allow free electrical carriers motion and ion *** a result,the prepared Ti_(3)C_(2.T_(x)/CNF aerogel-based electrode exhibits an exceptional gravimetric specific capacitance of 2.8 F g^(−1) at a current density of 0.5 A g^(−1) and an excellent cycling stability of 8000 cylcles,and the assembled symmetric supercapacitor,delivers a high energy density of 3.42. W h kg^(−1) at 6000 W kg^(−1).This work offers a new route for the rational construction of 3D MXene assembly for advanced energy storage materials.

关键词： MXene Electrospinning Aerogels Layered microstructures Energy storage

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Superior wide-temperature lithium storage in a porous cobalt vanadate

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Nano Research 2020年第7期13卷 1867-1874页

作者： Haoliang Chen dan Yang Xueye Zhuang Dong Chen Weiling Liu Qi {2. Huey Hoon Hng Xianhong Rui {2.yu Yan Shaoming huang Guangzhou key laboratory of Low-Dimensional Materials and Energy Storage Devices Collaborative Innovation Center of Advanced Energy MaterialsSchool of Materials and EnergyGuangdong University of TechnologyGuangzhou 510006China School of Materials Science and engineering Nanyang Technological UniversitySingapore 639798Singapore state key {2. of Vanadium and Titanium {2. Comprehensive Utilization Panzhihua 617000China

Lithium ion batteries(LIBs)that can be operated under extended temperature range hold significant application *** in this work,we successfully synthesized Co2.2.7 electrode with rich porosity from a facile hydrothermal and combustion *** applied as anode for LIBs,the electrode displayed excellent stability and rate performance in a wide range of ***,a stable capacity of 2.6 mAhg 1 was retained after cycling at a high current density of 10 A·g-1 for 6,000 cycles at room temperature(2.℃).And even when tested under extreme conditions,i.e.,-2. and 60℃,the battery still maintained its remarkable stability and rate *** example,at-2.℃,a capacity of 633 mAh·g 1 was retained after 50 cycles at 0.1 A·g 1;and even after cycling at 60℃ at 10 A·g-1 for 1,000 cycles,a reversible capacity of 885 mAh·g-1 can be *** believe the development of such electrode material will fciliate progress of the next-generation LIBs with wide operating windows.

关键词： lithium-ion battery anode material cobalt vanadate porous structure wide-temperature performance

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