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A STUDY OF FRACTURE OF UNIDIRECTIONAL CF/SiC SINGLE EDGE-NOTCHED BEAM UNDER THREE-POINT BENDING- MACRO/MICRO-NUMERICAL MONTE CARLO SIMULATION

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Acta Mechanica Solida Sinica 2001年第1期14卷 81-88页

作者： Wang Yang Cheng Tianle Xia Yuanming jiang dazhi Department of Mechanics & Mechanical Engineering University of Science and Technology of China He fei 230027 Department of Mechanics & Mechanical Engineering University of Science and Technology of China He fei 230027 Department of Mechanics & Mechanical Engineering University of Science and Technology of China He fei 230027 School of Aerospace & Materials Engineering National University of Defense Technology Changsha 410073 China

In this paper, the fracture process of a unidirectional CF/SiCsingle edge-notched beam (SENB) under three-point bending (TPB) isstudied by means of macro/micro-statistical Monte Car- lo *** simulated P-Δcurves are in agreement with the experimentalresults before the peaks of curves, and the simulated microevolutionpatterns are in agreement with the patterns of the crack surfaces,which have verified this method. It is preliminarily demonstratedthat the second turning point in the compliance changing rate curvecorresponds to the fracture initiation for experi- ments on SENBunder TPB of unidirectional CF/SiC composites.

关键词： CF/SiC fracture Monte Carlo simulation fracture initiation

Deformation Stages and Ar-Ar Age Data of the Wan-Zhe-Gan Tectonic Zone,Southeast China,and Their Tectonic Significance

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Acta Geologica Sinica(English Edition) 2011年第6期85卷 1373-1389页

作者： YU Xinqi WANG De＇en jiang dazhi jiang Laili ZHOU Xiang LI Chunlin State Key Laboratory of Geoprocesses and Mineral Resources China University of Geosciences Beijing 100083 China No. 332 Geological Team of Anhui Bureau of Geology and Mineral Resources Huangshan Anhui 245000 China Department of Earth Sciences University of Western Ontario London Ontario Canada N6A 5B7 Anhui Institute of Geological Survey Hefei Anhui 230001 China

The major tectonic zone that passes through the border regions of the Anhui, Zhejiang, and jiangxi Provinces in southeast China has been commonly referred to as the Wan-Zhe-Gan fault zone. Geologically, this zone consists of several regional fault belts of various ages and orientations. We have categorized the faults into four age groups based on field investigations. The Neoproterozoic faults are northeast striking. They start from the northeast jiangxi Province and extend northeastward to Fuchuan in Anhui Province, the same location of the northeast jiangxi-Fuchuan ophiolite belt. The faults probably acted during the Neoproterozoic as a boundary fault zone of a plate or a block suture with melange along the faults. The nearly east-west- or east-northeast-striking faults are of Silurian ages （40Ar/39Ar age 429 Ma）. This group includes the Qimen-Shexian fault and the jiangwang-Jiekou ductile shear belt. They represent a major tectonic boundary in the basement because the two sides of the fault have clear dissimilarities. The third group of faults is north-northeast striking, having formed since the early-middle Triassic with 40Ar/39Ar ages of 230-254 Ma. They form a fault belt starting from Yiyang in northern jiangxi and connect with the Wucheng as well as the Ningguo-Jixi faults. This fault belt is a key fault-magmatic belt controlling the formation of Jurassic-Cretaceous red basins, ore distribution, magmatic activity, and mineralization. When it reactivated during the late Cretaceous, the belt behaved as a series of reverse faults from southeast to northwest and composed the fourth fault group. Therefore, classifying the Wan-Zhe-Gan fault zone into four fault groups will help in the analysis of the tectonic evolution of the eastern segment of the jiangnan orogen since the Neoproterozoic era.

关键词： The Wan-Zhe-Gan fault zone changes of orientations different evolution stages 40Ar/39Ar geochronology the border region of Zhejiang jiangxi and Anhui Provinces

Metamorphism and geochronology of garnet amphibolite from the Beishan Orogen,southern Central Asian Orogenic Belt:Constraints from P-T path and zircon U-Pb dating

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Geoscience Frontiers 2020年第4期11卷 1189-1201页

作者： Wenbin Kang Wei Li Lei Kang Yunpeng Dong dazhi jiang Jiwei Liang Haoqiang Dong State Key Laboratory of Continental Dynamics Department of GeologyNorthwest UniversityXi’an 710069China Key Laboratory for the Study of Focused Magmatism and Giant Ore Deposits of Ministry of Natural Resources Xi'an Center of China Geological SurveyCGSXi'an 710054ShaanxiChina Department of Earth Sciences Western UniversityLondonOntarioN6A 5B7Canada School of Earth Science&Resources Chang’an UniversityXi’an 710054China

Numerous lenses of garnet amphibolite occur in the garnet-bearing biotite-plagioclase gneiss belt in the Baishan area of the Beishan Orogen,which connects the Tianshan Orogen to the west and the Mongolia-Xing’anling Orogen to the *** study of metamorphism in Beishan area is of great significance to explain the tectonic evolution of Beishan *** to the microstructures,mineral relationships,and geothermobarometry,we identified four stages of mineral assemblages from the garnet amphibolite sample:(1) a pre-peak stage,which is recorded by the cores of garnet together with core-inclusions of plagioclase(Pl1);(2) a peak stage,which is recorded by the mantles of garnet together with mantle-inclusions of plagioclase(Pl2)+amphibole(Amp1)+Ilmenite(Ilm1)+biotite(Bt1),developed at temperature-pressure(P-T) conditions of 818.9-836.5℃ and7.3-9.2 kbar;(3) a retrograde stage,which is recorded by garnet rims + plagioclase(Pl3)+amphibole(Amp2)+orthopyroxene(Opx1)+biotite(Bt2)+Ilmenite(Ilm2),developed at P-T conditions of 796.1-836.9℃ and5.6-7.5 kbar;(4) a symplectitic stage,which is recorded by plagioclase(Pl4)+orthopyroxene(Opx2)+amphibole(Amp3)+biotite(Bt3) symplectites,developed at P-T conditions of 732 ±59.6℃ and 6.1 ±0.6 ***,the U-Pb dating of the Beishan garnet amphibolite indicates an age of 301.9 ±4.7 Ma for the protolith and 281.4±8.5 Ma for the peak metamorphic ***,the mineral assemblage,P-T conditions,and zircon U-Pb ages of the Beishan garnet amphibolite define a near-isothermal decompression of a clockwise P-T-t(Pressure-Temperature-time) path,indicating the presence of over thickened continental crust in the Huaniushan arc until the Early Permian,then the southern Beishan area underwent a process of thinning of the continental crust.

关键词： Beishan orogen Garnet amphibolite P-T-t path Zircon U-Pb dating

An Evolutionary Adaptive System for Prediction of Strategy Influence:A Case Study of Government Regulation Guided Brand Innovation

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Complex System Modeling and Simulation 2022年第3期2卷 197-212页

作者： Jiali Lin Qiaomei Li Guangsheng Lin Zhihui He dazhi jiang Hao Liu Business School Shantou UniversityShantou 515063China Department of Computer Science Shantou UniversityShantou 515063China

Decision making is one of the common human *** in complex,interactive,and dynamic systems,it is extremely important to make decisions scientifically because the influence of the behavior after decision making is generally *** predictability of behavior influence is an effective way to improve the scientific decision *** a new branch of computing,computational experiment is an emerging management method for research on complex *** this paper,based on particle swarm intelligence,an evolutionary adaptive system model of brand innovation in the toy industry cluster is *** imitating the evolution process of the complex adaptive system,this method is helpful to analyze the impact of the management behavior brought to simulation system,predict the management behavior in real world,and finally choose the best management *** simulation tried to figure out the affection of government regulation strategies and provide corresponding assessments and recommendations,which gives a new solution to assist the government to effectively judge the influence of the macro policy,as well as provides a new way of thinking of the related intelligent decision making.

关键词： decision making behavior influence computational experiment evolution adaptive system brand innovation

石墨烯层间原位生长碳纳米管薄膜制备及其导热性能研究

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纤维复合材料 2024年第2期41卷 48-53页

作者：陶斯俊孙云波黎子熙陈文多江大志中山大学材料学院深圳519082

随着电子器件的集成化程度越来越高,对热管理材料的导热性能提出了更高要求。石墨烯具有很高的面内导热系数,由石墨烯微片堆叠而成的石墨烯薄膜面内方向具有较高导热性能,但是其厚度方向导热性能较低。碳纳米管与石墨烯有相同的元素组... 详细信息

随着电子器件的集成化程度越来越高,对热管理材料的导热性能提出了更高要求。石墨烯具有很高的面内导热系数,由石墨烯微片堆叠而成的石墨烯薄膜面内方向具有较高导热性能,但是其厚度方向导热性能较低。碳纳米管与石墨烯有相同的元素组成和相似的晶体结构,碳纳米管轴向热导率很高。本文通过将氧化铝颗粒、催化剂二茂铁和碳源PMMA同时引入氧化石墨烯薄膜层间,在氧化石墨烯薄膜热还原的同时,原位生长碳纳米管,形成含氧化铝颗粒、一维碳纳米管和二维石墨烯三种材料和多维结构石墨烯复合薄膜。其中,二维石墨烯片提供高的面内导热性能,沿石墨烯膜厚度(层间)生长的一维碳纳米管提供较高的厚度方向导热性能;氧化铝颗粒作为高导热填料,填充石墨烯薄膜的层间间隙,连通石墨烯片导热通道;同时,氧化铝颗粒作为碳纳米管高效原位生长的衬底,显著提高碳纳米管的生长效率,提高碳纳米管含量,显著提高石墨烯膜的导热性能。研究结果表明,厚度为50μm的还原氧化石墨烯复合薄膜的面内导热系数达1006±32 W/mk、厚度方向导热系数达7.30±0.16 W/mk。

关键词：石墨烯碳纳米管复合薄膜导热性能原位生长

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New Zircon U-Pb Ages of the Shirenshan Gneiss, North Qinling and Their Geological Implications

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Acta Geologica Sinica(English Edition) 2019年第1期93卷 238-240页

作者： WANG Jingya REN Shenglian jiang dazhi DONG Shuwen LI Jiahao LI Longming GE Can SONG Chuanzhong HAN Xu LI Zhenqiang School of Resources and Environmental Engineering Hefei University of Technology School of Earth Sciences Western University School of Geoscience and Engineering Nanjing University

The Qinling Orogenic Belt(QOB)is a composite continental orogenic belt that has experienced many tectonic *** QOB is subdivided into the following three litho-tectonic units:the North Qinling terrane,the Middle Qinling microplate and the South Qinling *** North Qinling Terrane(NQT)underwent destruction and lithospheric thinning during the late Mesozoic,accompanied by extensive magmatic activity and increased surface heat flux,led to large-scale tectonic extension(e.g.,Ren Shenglian et al.,2016).The Shirenshan gneiss is located along the contact between the NQT and the North China Block(Fig.1).Previous studies suggested that it was produced as a result of the northward subduction of the NQT beneath the North China Block(e.g.,Wang Jingya et al.,2017).Therefore,it is significant to study its structural geology,petrology,geochemistry and chronology in order to understand the tectonic settings and the interaction between the Middle Qinling microplate and the North China Block.

关键词： The Qinling Orogenic Belt(QOB) subdivided The North Qinling Terrane(NQT)

Molecular Dynamic Simulation Study on Glass Transition Temperature of DGEBA-THPA/SWCNTs Composites

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Journal of Materials Science and Chemical Engineering 2014年第1期2卷 26-30页

作者： Cai jiang Jianwei Zhang Shaofeng Lin dazhi jiang College of Aerospace Science and Engineering National University of Defense Technology Changsha China

Molecular dynamic (MD) simulations were carried out to predict the thermo-mechanical properties of the cured epoxy network composed of diglycidyl ether bisphenol A (DGEBA) epoxy resin and tetrahydrophthalic anhydride (THPA) curing agent and their single-walled carbon nanotubes (SWCNT) reinforced the epoxy matrix composites. Different characters such as the density of the materials and mean square displacements (MSDs) were calculated to estimate the glass transition temperatures (Tgs) of of the materials. 365 K and 423 K of the Tgs were obtained respectively, whereas the latter is much higher than the former. The simulation results indicated that the incorporation of SWCNTs in the epoxy matrix can significantly improve the Tg of the cured epoxy. The approach presented in this study is ready to be applied more widely to a large group of candidate polymers and nanofillers.

关键词： Molecular Dynamics Simulation Glass Transition Temperature Carbon Nanotubes Composites

剪切带运动学:重点评述三斜模式和区分韧性滑动擦痕与拉伸线理的重要性

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地质通报 2007年第9期26卷 1139-1153页

作者：林寿发姜大志 Paul F. Williams Shoufa LIN dazhi jiang Paul F WILLIAMS 滑铁卢大学地球与环境科学系加拿大安大略省滑铁卢市N2L3G1 中国科学院地质与地球物理研究所岩石圈演化国家重点实验室北京100029 西安大略大学地球科学系加拿大安大略省伦敦市N6A587 合肥工业大学资源与环境学院安徽合肥230009 新布伦瑞克大学地质系加拿大新布伦瑞克省弗雷德里克顿市E3B5A3

详细评述了剪切带运动学和内部几何学研究的新进展。剪切带内的递进变形一般为三斜对称,单斜剪切带(包括简单剪切带)是特例情形。理论模拟表明,如同许多天然剪切带中所见到的,在三斜剪切带中,拉伸线理的方位可从近水平到平行于倾向连续... 详细信息

详细评述了剪切带运动学和内部几何学研究的新进展。剪切带内的递进变形一般为三斜对称,单斜剪切带(包括简单剪切带)是特例情形。理论模拟表明,如同许多天然剪切带中所见到的,在三斜剪切带中,拉伸线理的方位可从近水平到平行于倾向连续变化。过去一般将拉伸线理的方向当作剪切运动方向的做法是以简单剪切模式为基础的,不适合于一般剪切带。在三斜剪切带中,拉伸线理和剪切方向之间不存在简单关系。然而,C面上的韧性滑动擦痕平行于剪切方向发育,是剪切方向的可靠标志。因此,在剪切带运动学解释中区分韧性滑动擦痕与拉伸线理非常重要。

关键词：剪切带运动学三斜模式剪切方向拉伸线理韧性滑动擦痕

Rheological Behaviors and Processing Windows of Low Viscosity Epoxy Resin for VIMP

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Journal of Wuhan University of Technology(Materials Science) 2011年第5期26卷 931-934页

作者：刘卓峰 College of Aerospace and Material Engineering National University of Defense Technology

The chemorheological behaviors of a low viscosity epoxy resin system （Huntsman 1564/3486） for vacuum infusion moulding process （VIMP） were studied with viscosity *** dual-Arrhenius rheological model and the engineering viscosity model were established and compared with the experimental *** result showed that the viscosity in the earlier stage calculated by dual-Arrhenius model were smaller than the experimental data,while the data calculated by the engineering model were *** the two models together can predict the rheological behaviors of the resin system in a more credible *** processing windows of the resin system for VIMP were determined based on the two *** optimum processing temperature is 30-45 ℃.

关键词： vacuum infusion molding process(VIMP) epoxy resin rheological behaviors