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| 1 | Friction behavior of coupling motion for natural articular cartilage by reciprocating rotation显示文摘Based on the irregular surface of natural cartilage configurations, the tribological characteristics of coupling motion between natural cartilage pairs were investigated by the variation of rotated offset and velocity. Contact displacement, contact load, friction force and coefficient of friction from natural cartilage pairs were measured by a UMT-2 testing machine. In order to obtain the steady part and wavy part, the contact load and contact displacement were decompounded by the five-point sliding average method. These results showed that the contact load was composed of steady load and wavy load. And the contact displacement was composed of cartilage deformation and surface outline. The steady load was similar to exterior load while natural cartilage deformation increased nonlinearly with the sliding time. Wavy load had the correlative coefficient 0.235 with surface outline due to the irregular surface of friction configurations. The coefficient of friction from cartilage friction configurations was less influenced by smaller magnitude in rotated parameters. A few strange summits were obtained in the area of coef-ficient of friction, and significantly related with local minimal values corresponding to the contact loads. The rotated offsets had clear impact on contact load and a slight impact on contact displacement. Larger offset produced higher wavy magnitude of the contact load. The rotated velocities played an evident role in cartilage deformation, but had a less influence on contact load. Lower velocity brought larger cartilage deformation. | QIAN ShanHua1,2,3 & GE ShiRong1,3 1 College of Mechano-electronic Engineering, China University of Mining & Technology, Xuzhou 221116, China 2 Institute of Tribology and Reliability Engineering, China University of Mining & Technology, Xuzhou 221116, China 3 Biotribology Center, State Key Laboratory of Tribology, Xuzhou 221116, China | 2009 | Chinese Science Bulletin2009，54，4： | 8 |
| 2 | Description to wear debris boundaries by radar graph fractal method显示文摘In this paper,radar graph fractal method is introduced to describe wear debris boundaries. Research results show that it is a nice way to describe wear debris boundaries. Since the longest axis is selected as the first coordinate axis,its center point selected as the center point of the radar graph,and the co-ordinate value of wear debris boundary selected as the measure parameter,the limitations existing in Yard fractal measure method can be avoided. For any wear debris,its radar graph fractal dimension value is one and only,and as the wear debris shape changes from round to strip,the radar graph fractal dimension value also changes from low to high,showing strong uniqueness and independence. Due to the fact that the researched wear debris is gotten in different wear states,the results also prove that radar graph fractal dimension value is correlated with frictional pairs work condition and wear state. Radar graph fractal method is compared with Yard fractal measure methods,and results show that ra-dar graph fractal dimension values gotten from different wear debris have enough value grads to avoid effect of errors,and provide higher sensitivity for wear debris shape. This paper also discusses the influencing factors for radar graph fractal method. With the increase of the decomposing degree value,the radar graph fractal dimension tends to keep stable at one certain value,showing the typical characteristic of the fractal theory. All this proves that radar graph fractal method is an effective description method for wear debris boundaries. | LIU HongTao1,2 & GE ShiRong1 1 Institute of Tribology and Reliability Engineering,China University of Mining & Technology,Xuzhou 221008,China 2 College of Mechanical and Electrical Engineering,China University of Mining & Technology,Xuzhou 221116,China | 2007 | Chinese Science Bulletin2007，52，16： | 6 |
| 3 | Wettability Modification for Biosurface of Titanium Alloy by Means of Sequential Carburization显示文摘Microporous titanium carbide coating was successfully synthesized on medical grade titanium alloy by using sequentialcarburization.Changes in the surface morphology of titanium alloy occasioned by sequential carburization were characterizedand the wettability characteristics were quantified.Furthermore,the dispersion forces were calculated and discussed.The resultsindicate that sequential carburization is an effective way to modify the wettability of titanium alloy.After the carburization thesurface dispersion force of titanium alloy increased from 76.5×10-3J·m-2 to 105.5×10-3 J·m-2,with an enhancement of37.9 %.Meanwhile the contact angle of titanium alloy decreased from 83° to 71.5°,indicating a significant improvement ofwettability,which is much closer to the optimal water contact angle for cell adhesion of 70°. | Yong Luo~(1,2) Shi-rong Ge~1 Zhong-min Jin~21.Institute of Tribology and Reliability Engineering,School of Material Science and Engineering,China University of Mining and Technology,Xuzhou 221008,P.R China2.Institute of Medical and Biological Engineering,School of Mechanical Engineering,University of Leeds,Leeds LS2 9JT,UK | 2009 | Journal of Bionic Engineering2009，6，3： | 6 |
| 4 | 活性氧化铝除氟研究显示文摘针对目前活性氧化铝饮水除氟中存在的问题,进行了生产性试验研究,通过采用原水投加CO_2气体降低pH值、小颗粒活性氧化铝、大流量短历时的NaOH循环再生法等新技术,提高了活性氧化铝的吸附容量和处理水的能力,克服滤料板结和假疲劳,除氟效果稳定可靠,水质好,再生时间短,用药省,降低了基建投资和运转费用。 | North China Municipal Engineering Design Institute A full-scale plant was set up for studying the existing problems on the fluoride removal from drinking water by activated alumina. Some new methods was adopted,such as the addition of CO2to reduce water pH value,the use of small-sized activated alumina,and the employment of a cyclic regeneration at large flow rate with NaOH as regenerant,which result in the improvement of adsorption capacity of activated alumina and treatment capacity, the elimination of the hardening of filtration materials and false fatigue,stable and reliable effectiveness,good quality in water,short regeneration time,small consumption of regenerant. And then the capital and openational costs were reduced. | 1989 | 中国给水排水1989，5，3： | 5 |
| 5 | Relations between thickness of UHMWPE’s wear debris and positive pressure of tribological system显示文摘MiaoXAM2.5X-50X Ultrahigh Precision Surface 3D Profiler is introduced to research the relations be- tween thickness of UHMWPE’s wear debris and positive pressure of tribological system. Research re- sults show that thickness of wear debris owns evident classification, and the first grade thickness math model and the second grade thickness math model are built. By the second grade thickness math model, the true force condition in the tribological system can be gotten, and the model can be used as a tool to modify simulating parameters of the tribological system, and it is an important inspecting method to the airtight system which cannot be examined in real time. The first grade thickness math model can describe the true working load and surface condition of work piece in the tribological sys- tem, and is an effective description method for the running condition of frictional pairs. The research results at different lubricating conditions testify the relations between thicknesses of wear debris and positive pressure of the tribological system. The fractal relation between maximal thickness of wear debris and positive pressure is discussed. The conceptions of the immutability principle and charac- teristic granularity of wear debris thickness are brought forward and discussed. In conclusion, as a stable tribological parameter owning mechanical theory basis, wear debris thickness will play an im- portant part in fault diagnosis, especially for the airtight system such as artificial joint. | LIU HongTao1,2,3 & GE ShiRong1,3 1 Institute of Tribology and Reliability Engineering, China University of Mining & Technology, Xuzhou 221116, China 2 College of Mechanical and Electrical Engineering, China University of Mining & Technology, Xuzhou 221116, China 3 Biotribology Center, State Key Laboratory of Tribology, Xuzhou 221116, China | 2008 | Chinese Science Bulletin2008，53，9： | 2 |
| 6 | The IEEE reliability test system-1996显示文摘 | Reliability Test System Task Force | 1999 | IEEE Transactions on Power Systems1999，14，3： | 1 |
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| 8 | IEEE reliability test system显示文摘 | The Reliability Test System Task Force of the Application of Probability Methods Subcommittee | 1979 | IEEE Transactions on Power Apparatus and Systems1979，98，： | 1 |
| 9 | A report prepared by the reliability test system task force of the application of probability methods subcommittee显示文摘 | The IEEE Reliability Test System | 1999 | IEEE Transactions on Power Systems1999，14，3： | 1 |
| 10 | Limitation and Application显示文摘 | Goel A L Software Reliability Models | 1985 | IEEE Transaction on Software Engineering1985，11，12： | 1 |
| 11 | IEEE reliability test system 显示文摘 | The Reliability Test System Task Force of the Application of Probability Methods Subcommittee | 1979 | IEEE Transactions on Power Apparatus and Systems1979，98，6： | 1 |
| 12 | Report of large motor reliability survey of industrial and commercial installations,Part Ⅰ~Ⅱ显示文摘 | IAS Motor Reliability Working Group | 1985 | IEEE Transactions on Industry Applications1985，21，4： | 1 |
| 13 | The IEEE Reliability Test System-1996 显示文摘 | RELIABLITY TEST SESTEM TASK FORCE | 1999 | IEEE Trans on Power Systems1999，14，3： | 1 |
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| 15 | IEEE reliability test system显示文摘 | The Reliability Test System Task Force of the Application of Probability Methods Subcommittee | 1979 | IEEE Trans on Power Apparatus and Systems1979，98，6： | 1 |
| 16 | The IEEE reliability test system--1996显示文摘 | The Reliability Test System Task Force of the Application of Probability Methods Subcommittee | 1999 | IEEE Trans on Power Systems1999，14，3： | 1 |
| 17 | Fatigue reliability: development of criteria for design显示文摘 | Conmittee on Fatigue and Fracture Reliability of the Committee on Structural Safety and Reliability of the Structural Division | 1982 | Journal of the Structural Division1982，108，1： | 1 |
| 18 | IEEE reliability test system显示文摘 | The Reliability Test System Task Force of the Application of Probability Methods Subcommittee | | 0，，06： | 1 |
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