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PROGRESSIVE COALESCENCE MODEL FOR BRITTLE FAULT FORMATION AND ITS MECHANISM

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Geotectonica et Metallogenia 2002年第1期26卷 63-67页

作者： WANG Yong1, TANG Shi jia2.and PENG En sheng2.1. Institute of Mineral and Resources, china Academy of Geoscience, Beijing 100037, china 2. Institute of Geology, {2. south university of technology, changsha 410083, china) Institute of Mineral and Resources China Academy of Geoscience Beijing 100037China Institute of Geology Central South University of Technology Changsha 410083China

In shallow crust, faults often consist of a series of secondary fractures. Based on experimental micro features in rock mechanics and macro structures in field, the progressive coalescence model, in which a brittle fault evolved from micro crack, stylolitic fracture, large fault to super large fault, is founded, and its forming mechanism is discussed by variation of stress field. At last the undulation, branches of faults and the phenomenon that the angle between fractures and the principal stress axis decreases gradually are explained by the *** model.

关键词： Crack principal stress progressive coalescence model mechanism

MASS TRANSFER TO LIQUID-LIQUID INTERFACE

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Acta Metallurgica Sinica(English Letters) 1996年第2期9卷 151-156页

作者： LI Xinhai YIN Zhoulan(central-south {2. of technology,changsha 410083,china) central-south Univ of {2. Changsha China

Experiments have been done on mass transfer to a liquid-liquid interface on which inert gas bubbles are *** simulate the pyrometallurgy system of melten slag-metal(or matte),aqueous solution-mercury(or zinc amalgam) system was *** mass transfer coefficients of indicator ions as a function of bubble parameters have been *** experimental results show satisfactory agreement with the mass transfer model proposed Previously.

关键词： mass transfer gas bubble liquid-liquid interface

Ti/Al_2._3 Functionally Gradient Material Prepared by the Explosive Compaction/SHS Process

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Journal of Materials Science & technology 1999年第3期15卷 271-275页

作者： Yimin LI(Powder Metallurgy Research Institute, central-south {2. of technology, changsha 410083, china)Ziqiao ZHENG(Department of Materials Science and Engineering, central-south {2. of technology, changsha 410083, china) Cent S Univ Technol Powder Met Res Inst Changsha 410083 Peoples R China Cent S Univ Technol Dept Mat Sci & Engn Changsha 410083 Peoples R China

Ti1Al2.3 Functionally Gradient Material (FGM) was prepared by an explosive compaction/SHS process. Ten sheets of the compounding powder were laminated and pressed to get a green body of FGM. It was then compacted explosively By burying the explosive compaction body into a stoichiometric Al/TiO2.mixture and igniting the combustion of the stoichiometric Al/TiO2.mixture, the SHS reaction of the explosive compaction body was initiated by the heat released from the combustion of the stoichiometric Al/TiO2.mixture. In this way, Ti/Al2.3 FGM was synthesized. The adiabatic temperatures of each gradient layer were calculated when the preheating temperatures were 2.8 K and 1173 K, respectively The microstructure, composition and properties of Ti/Al2.3 FGM and the reaction mechanism of each gradient layer were studied. It was found that Ti/Al2.3 FGM prepared by the explosive compaction/SHS process had a high density and a high microhardness. Its structure, composition and properties showed apparent gradient distribution. The structure of the standard stoichiometric ratio gradient layer of FGM was a network structure. Its reaction mode could be described as follows: Al powder melted first, then the molten Al penetrated into the TiO2.zone and reacted with TiO2. and big pores were left in the original positions of Al powder. The reaction of gradient layers with the addition of Al3O3 as diluents was similar to that of the standard stoichiometric ratio gradient layer, so were their structure and composition. However, the reaction of gradient layers with the addition of Ti as diluents was more complex and the composition deviated slightly from the designed one

关键词： Al SHS Ti/Al2.3 Functionally Gradient Material Prepared by the Explosive Compaction/SHS Process

INFLUENCE OF HEAT TREATMENT ON THE MECHANICAL PROPERTIES OF RE Al-5.0Mg-0.6Cu ALLOY SHEET FOR AUTOMOBIL BODIES

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中国有色金属学会会刊：英文版 1993年第2期3卷 45-50页

作者： Sun,Xiaohua Wang,Mingpu central south {2. of technology,changsha 410083,china

The influences of solution temperature,time in solution and quenching rate on the mechanical properties ofRE Al-5.0Mg-0,6Cu(wt.-%)alloy sheets for automobile bodies have been *** results show the re-quirements for heat treatments for the alloy sheets were not *** this alloy sheets are easy to produceon an industrial *** experiments indicate that there exists slight age hardening in the *** typicalmicrostructures of the alloy have also been analysed.

关键词： heat treatment rare earth Al-Mg-Cualloy mechanical properties

A Constitutive Model for Hot Pressing of Powders

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Journal of Materials Science & technology 1994年第5期10卷 374-380页

作者： Rongde GE (Dept. of Nonferrous Metallurgy, central south {2. of technology, changsha, 410083, china) central south Univ of {2. Changsha China

Based on an assumption that the effective pressure in hot pressing related to the applied pressure varies with the relative density of the compact in a power law form. a three-dimensional viscoelastic model that depicts the viscoelastic detormation behaviour of powder compacts in hot pressing has been developed. It has been shown by the experimental data that the proposed model in which the parameters are determined by means of nonlinear regression analysis can be used to describe the density-time relationship for the hot pressing of pure magnesium oxide and atomized iron powders and to estimate the end-point relative density of the compact.

关键词： A Constitutive Model for Hot Pressing of Powders

THE TOLERANCE DESIGN MANUFACTURE AND RELIABILITY

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中国有色金属学会会刊：英文版 1995年第2期5卷 127-130页

作者： Jiang, Jianchun(Department of Mechanical Engineering,central south {2. of technology, changsha 410083) central south Univ of {2. Changsha China

ＴＨＥＴＯＬＥＲＡＮＣＥＤＥＳＩＧＮＭＡＮＵＦＡＣＴＵＲＥＡＮＤＲＥＬＩＡＢＩＬＩＴＹ￥Ｊｉａｎｇ，Ｊｉａｎｃｈｕｎ（ＤｅｐａｒｔｍｅｎｔｏｆＭｅｃｈａｎｉｃａｌＥｎｇｉｎｅｅｒｉｎｇ，ＣｅｎｔｒａｌＳｏｕｔｈＵｎｉ... 详细信息

ＴＨＥＴＯＬＥＲＡＮＣＥＤＥＳＩＧＮＭＡＮＵＦＡＣＴＵＲＥＡＮＤＲＥＬＩＡＢＩＬＩＴＹ￥Ｊｉａｎｇ，Ｊｉａｎｃｈｕｎ（ＤｅｐａｒｔｍｅｎｔｏｆＭｅｃｈａｎｉｃａｌＥｎｇｉｎｅｅｒｉｎｇ，ＣｅｎｔｒａｌＳｏｕｔｈＵｎｉｖｅｒｓｉｔｙｏｆＴｅｃｈｎｏｌｏ...

关键词： tolerance fit reliability service probability distribution machining precision tribology design CAD

MEASURING PRECISION OF INDUCED POLARIZATION METHOD

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中国有色金属学会会刊：英文版 1994年第4期4卷 1-6页

作者： He,Jishan(central south {2. of technology,changsha 410083)

ＭＥＡＳＵＲＩＮＧＰＲＥＣＩＳＩＯＮＯＦＩＮＤＵＣＥＤＰＯＬＡＲＩＺＡＴＩＯＮＭＥＴＨＯＤ￥Ｈｅ，Ｊｉｓｈａｎ（ＣｅｎｔｒａｌＳｏｕｔｈＵｎｉｖｅｒｓｉｔｙｏｆＴｅｃｈｎｏｌｏｇｙ，Ｃｈａｎｇｓｈａ４１００８３）Ａｂ... 详细信息

ＭＥＡＳＵＲＩＮＧＰＲＥＣＩＳＩＯＮＯＦＩＮＤＵＣＥＤＰＯＬＡＲＩＺＡＴＩＯＮＭＥＴＨＯＤ￥Ｈｅ，Ｊｉｓｈａｎ（ＣｅｎｔｒａｌＳｏｕｔｈＵｎｉｖｅｒｓｉｔｙｏｆＴｅｃｈｎｏｌｏｇｙ，Ｃｈａｎｇｓｈａ４１００８３）Ａｂｓｔｒａｃｔ：Ｏｎｔｈｅｐｒｅｍｉ...

关键词： measuring precision induced polarization method (IP) dual-frequency IP frequency domain IP time IP

METALLOGENIC CHARACTERISTICS AND OREPROSPECTINGFUTURE OF PRECAMBRIAN GOLD DEPOSITSIN MUFUJIULING DISTRICT

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Journal of central south {2. 1996年第1期8卷 11-13页

作者： Wu Yanzhi(Department of Geology, central south {2. of technology,changsha 410083, china) Department of Geology Central South University of Technology Changsha 410083 China

MufuJiuling district is an important placer gold producing land since the ancient time. In recent years, some primary gold deposits and mineralizations, e. g., Huangjindong and Tulongshan gold deposits, have been found. But the metallogenic conditions and regularities as well as the oreprospecting future remain to be recognized. Through the study on the metallogenic background and condition, the auriferous source bed and the mineralizing characteristics, three types of primary gold deposits are confirmed to be prospective in this district and some key problems about their prospecting and evaluating are put forward.

关键词： primary gold deposit PreCambrian age metallogenic marker

CAVABILITY CLASSIFICATION MODEL IN BLOCK CAVING

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中国有色金属学会会刊：英文版 1996年第3期6卷 5-9页

作者： Wang Liguan(Deportment of Resources Exploitation Engineering,central south {2. of technology, changsha 410083) CENT S UNIV TECHNOL DEPT RESOURCES EXPLOITAT ENGNCHANGSHA 410083PEOPLES R CHINA

ＣＡＶＡＢＩＬＩＴＹＣＬＡＳＳＩＦＩＣＡＴＩＯＮＭＯＤＥＬＩＮＢＬＯＣＫＣＡＶＩＮＧ￥ＷａｎｇＬｉｇｕａｎ（ＤｅｐｏｒｔｍｅｎｔｏｆＲｅｓｏｕｒｃｅｓＥｘｐｌｏｉｔａｔｉｏｎＥｎｇｉｎｅｅｒｉｎｇ，ＣｅｎｔｒａｌＳｏ... 详细信息

ＣＡＶＡＢＩＬＩＴＹＣＬＡＳＳＩＦＩＣＡＴＩＯＮＭＯＤＥＬＩＮＢＬＯＣＫＣＡＶＩＮＧ￥ＷａｎｇＬｉｇｕａｎ（ＤｅｐｏｒｔｍｅｎｔｏｆＲｅｓｏｕｒｃｅｓＥｘｐｌｏｉｔａｔｉｏｎＥｎｇｉｎｅｅｒｉｎｇ，ＣｅｎｔｒａｌＳｏｕｔｈＵｎｉｖｅｒｓｉｔｙｏｆＴｅ...

关键词： block caving cavability classification of orebody rock mass quality estimation