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| 1 | Three-dimensional Cure Simulation of Stiffened Thermosetting Composite Panels显示文摘Stiffened thermosetting composite panels were fabricated with co-curing processing.In the co-curing processing,the temperature distribution in the composite panels was nonuniform.An investigation into the threedimensional cure simulation of T-shape stiffened thermosetting composite panels was presented.Flexible tools and locating tools were considered in the cure simulation.Temperature distribution in the composites was predicted as a function of the autoclave temperature history.A nonlinear transient heat transfer finite element model was developed to simulate the curing process of stiffened thermosetting composite panels.And a simulation example was presented to demonstrate the use of the present finite element procedure for analyzing composite curing process.The glass/polyester structure was investigated to provide insight into the nonuniform cure process and the effect of flexible tools and locating tools on temperature distribution.Temperature gradient in the intersection between the skin and the flange was shown to be strongly dependent on the structure of the flexible tools and the thickness of the skin. | Guangquan Yue,Boming Zhang ,Fuhong Dai and Shanyi Du Center for Composite Materials,Harbin Institute of Technology,Harbin 150080,China | 2010 | Journal of Materials Science & Technology2010，26，5： | 13 |
| 2 | Numerical simulation on electromagnetic field,flow field and temperature field in semisolid slurry preparation by A-EMS显示文摘A two-dimensional computational model coupling an annular electromagnetic stirring(A-EMS) with a macroscopic heat and fluid flow analysis in Al-alloys semisolid slurry preparation was developed.The dynamic evolutions of the electromagnetic field,flow field,and temperature field were presented successfully by commercial software ANSYS 10.0 with corresponding experimental verification.A horizontally rotational electromagnetic field and,thereby,a more intensive velocity field were uniformly distributed in the stirred melt even at commercial frequency,and thus,a lower temperature difference in the stirred melt and subsequent uniformly fine microstructures were obtained compared with the normal electromagnetic stirring.The simulation results were in good agreement with experimental ones. | ZHANG Zhifeng,CHEN Xingrun,XU Jun,and SHI Likai National Engineering & Technology Research Center for Nonferrous Metal Matrix Composites,General Research Institute for Nonferrous Metals,Beijing 100088,China | 2010 | Rare Metals2010，29，6： | 13 |
| 3 | Stiffness requirement of flexible skin for variable trailing-edge camber wing显示文摘The method for analyzing the deformation of flexible skin under the air loads was developed based on the panel method and finite element method.The deformation of flexible skin under air pressures and effects of the local deformation on the aerodynamic characteristics were discussed.Numerical results show that the flexible skin on the upper surface of trailing-edge will bubble under the air loads and the bubble has a powerful effect on the aerodynamic pressure near the surface of local deforma-tion.Then the stiffness requirements for flexible skin of variable trailing-edge were given by using the Jacobs rule,i.e.,the maximum displacement of skin is not greater than 0.1% of wing chord.Results show that the in-plane stiffness can be reduced by increasing the ratio of bending stiffness to in-plane stiffness.Although the deformation of flexible skin increases with the in-plane stiffness decreasing,it depends on the bending stiffness.When the bending stiffness exceeds critical value,the deformation of flexible skin only depends on the bending stiffness and has nothing to do with the in-plane stiffness.The conclusions can be used for the structural design of flexible skin. | YIN WeiLong Center for Composite Materials and Structures and Postdoctoral Station of Mechanics,Harbin Institute of Technology,Harbin 150080,China | 2010 | Science China(Technological Sciences)2010，53，4： | 9 |
| 4 | A FLOW STRESS MODEL FOR AZ61 MAGNESIUM ALLOY显示文摘The flow stress behaviors of AZ61 alloy has been investigated at temperature range from 523 to 673K with the strain rates of 0.001-1s-1.It is found that the average activation energy,strain rate sensitive exponent and stress exponent are different at various deformation conditions changing from 1i3.6 to 176.3k J/mol,0.125 to 0.167 and 6 to 8 respectively.A flow stress model for AZ61 alloy is derived by analyzing the stress data based on hot compression test.It is demonstrated that the flow stress model including strain hardening exponent and strain softening exponent is suitable to predicate the flow stress.The prediction of the flow stress of AZ61 alloy has shown to be good agreement with the test data.The maximum differences of the peak stresses calculated by the model and obtained by experiment is less than 8%. | H.T.Zhou X.Q.Zeng Q.D Wang W.J.Ding State Key Laboratory of Metal Matrix Composite,Shanghai Jiaotong University,Shanghai 200030,China | 2004 | Acta Metallurgica Sinica(English Letters)2004，17，2： | 8 |
| 5 | Electrospinning of ultrafine core/shell fibers for biomedical applications显示文摘Because of the inherent appearance similar to the natural extracellular matrix,ultrafine fibrous membranes prepared via electrospinning exhibit widespread applications,especially in the biomedical area.Extensional modifications of coaxial and emulsion electrospinning have drawn much attention in preparation of core/shell fibers for applications as tissue engineering scaffolds and controlled delivery systems for bioactive substances.Due to incorporation of multi-components in the electrospun core/ shell fibers,the process of coaxial and emulsion electrospinning became more susceptible.The theories have not been fully understood.A series of investigations were carried out evaluating the systematic and processing parameters.This paper reviews advantages and potentials of electrospun core/shell fibers as well as factors influencing their formation on the basis of our research and new progress. | ZHANG Hong,ZHAO ChenGuang,ZHAO YunHui,TANG GongWen & YUAN XiaoYan School of Materials Science and Engineering,and Tianjin Key Laboratory of Composite and Functional Materials,Tianjin University,Tianjin 300072,China | 2010 | Science China Chemistry2010，53，6： | 7 |
| 6 | Diffusion Bonding of Silicon Carbide Particulate Reinforced 2024 Al Composites显示文摘A study has been made on diffusion bonding of SiCp/2024Al composites by means of pure Al interlayer. In the condition of TB=843 K, PB=16 MPa, tB=60 min, the diffusion bonded joint, with a shear strength of 235 MPa, was obtained when a 15μm thick interlayer was used. The results of the shear testing and SEM indicate that fracture of the joint presented characteristics of ductile rupture. | Mingjiu ZHAO+, Liqing CHEN and Jing BI (Metal Matrix Composites Department, Institute of Metal Research, Chinese Academy of Sciences, Shenyang 110015, China) Gang ZHANG (Shenyang Institute of Technology, Shenyang 110015, China) | 2000 | Journal of Materials Science & Technology2000，16，5： | 6 |
| 7 | A NEW METHOD TO PREPARE CHITOSAN MEMBRANE AS A BIOMEDICAL MATERIAL显示文摘This paper reports a new method to prepare chitosan membrane which could be used as a biomedical material.Addition of a fixation agent composed of alcohol, glycerol and potassium hydroxide can accelerate the sol-gel transformation process and hence shorten the preparation period. The present method takes about 6 h to get a flexible membrane with fine appearance. The physical and biological properties of the membrane were also investigated and compared with the membrane prepared by conventional method. | Qiao-ling Hu Zheng-ping Fang Ying Zhao Cheng-wei Xu Institute of Polymer Composites Zhejiang University Hangzhou 310027, China | 2001 | Chinese Journal of Polymer Science2001，19，5： | 6 |
| 8 | In-situ Formed AIN Particulates and TiN Whiskers Mixture Reinforced Al Composite显示文摘 | Chunxiang CUI Renjie WU and Guoding ZHANG (Institute of Composite Materials, Shanghai Jiao Tong University, Shanghai 200030, China) | 1996 | Journal of Materials Science & Technology1996，12，5： | 6 |
| 9 | Investigation of tribological performances of MCMB显示文摘Tribological properties of Meso-carbon Microbeads (MCMB) powders as a special addi-tive in pentaerythritol were investigated on an Optimal SRV tribotester at 300℃. The coarsely dis-persed lubricant system demonstrates fine lubricious effectiveness at the operation temperature.The friction coefficient dropped from 0.2 to circa 0.12 in the presence of MCMB in pentaerythritolfor the No.45 carbon steel tribomate. Raman spectroscopy analysis indicated the partial transfor-mation of MCMB into increased ordered structures that contributed to the lowering of friction. | CUI Xiaohao LI Shenghua SONG Huaihe JIN Yuansheng FU Honglan 1. National Tribology Laboratory, Tsinghua University, Beijing 100084, China 2. Institute of Carbon Fibers & Composites, Beijing University of Chemical Technology, Beijing 100029, China 3. Department of Biology, Peking University, Beijing 100871, China | 2001 | Science China Mathematics2001，44，S1： | 6 |
| 10 | 木/塑纤维复合材料在轿车工业中的应用前景显示文摘介绍了木/塑纤维复合材料的特点、采用的主要原材料以及对原材料的要求。同时简要介绍了复合材料加工工艺过程;我国在木/塑纤维复合材料领域的开发现状,并就复合材料在轿车工业中应用的市场前景进行了初步分析。 | Research Group of Wood/Plastic Composites (Research Institute of Wood Industry, CAF, Beijing 100091) | 1997 | 木材工业1997，11，5： | 5 |
| 11 | Effect of Temperature on the Synthesis of SiC Coating on Carbon Fibers by the Reaction of SiO with the Deposited Pyrolytic Carbon Layer显示文摘The influence of reaction temperature on the preparation of SiC coating on carbon fibers by the reaction of silicon monoxide with the deposited pyrolytic carbon (PyC) layer has been discussed.With rising reaction temperature,the thickness of SiC layer increases and the SiC grain is coarsening.The apparent activation energy for the synthesis of SiC layer is about 103.3 kJ/mol.The oxidation resistance of carbon fiber can be improved by the SiC/PyC layers significantly.The initial oxidation temperature of the SiC/PyC coated carbon fiber is about 300℃ higher than that of the uncoated carbon fiber.The oxidation of the SiC/PyC coated carbon fiber is owing to the diffusion of oxygen through the cracks generated by the mismatch of thermal expansion. | Hejun Li,Haibo Ouyang,Lehua Qi,Yulei Zhang,Zhengjia Li and Jianfeng Wei C/C Composites Research Center,Key Laboratory of Ultrahigh Temperature Composites,Northwestern Polytechnical University,Xi an 710072,China | 2010 | Journal of Materials Science & Technology2010，26，3： | 5 |
| 12 | Surface investigation on Upilex-S polymide film iradiated by vacuum ultraviolet radiation显示文摘Vacuum ultraviolet radiation of Upilex-S polyimide film 25 μm thick was performed using a gas jet type of vacuum ultraviolet simulator which gives unfixed wavelength from 5 nm to 200 nm.Nanoparticles redeposited on the films were observed and the nanoparticles formed on the surface consist mainly of carbon clusters.Changes in the composition and the chemical characteristics of film surface after radiation were identified by X-ray photoelectron spectroscopy(XPS).Relative O content in the radiated area was found to be higher,while N content was lower than in the pristine area.This indicates that Upilex-S polyimide film releases N atoms as volatile species.And the C1s,O1s envelopes were fitted using Multipak Spectrum software.The surface morphologies on iradiated area were examined by Atomic Force Microscope(AFM).Pieces of radiant products protrude from the eradiated surface,leading to considerable roughness for the iradiated area.And the surface transmittance of Upilex-S film after radiation reduces. | LIU Yuyan1),GONG Xianyun2),WAN Zhimin3),and DU Xingwen4)1) Department of Applied Chemistry,Harbin Institute of Technology,Harbin 150001,China 2) Department of Life Science and Chemistry,Harbin University,Harbin 150001,China 3) Analysis and Measurement Center,Harbin Institute of Technology,Harbin 150001,China 4) Center for Composite Materials,Harbin Institute of Technology,Harbin 150001,China | 2007 | Rare Metals2007，26，S1： | 5 |
| 13 | The nonlocal solution of two parallel cracks in functionally graded materials subjected to harmonic anti-plane shear waves显示文摘在这篇论文,在机能上地分级的材料(FGM ) 的二个平行裂缝的动态相互作用借助于非局部的理论被调查。使分析易控制, shear 模量和材料密度被假定与对裂缝垂直的坐标指数地变化。减少数学困难,一个一个维的非局部的核被使用而不是二维的让动态问题在裂缝尖端附近获得压力领域。由 Fourier 变换的使用,这个问题能在二个双不可分的方程,未知变量在是越过裂缝表面的排水量的 jumps 的帮助下被解决。解决双不可分的方程,越过裂缝表面的排水量的 jumps 在一系列 Jacobi 多项式被扩展。不同于古典弹性答案,没有压力奇特在裂缝尖端是在场的,这被发现。非局部的有弹性的答案在裂缝尖端产出一个有限的箍压力。现在的结果提供对评估相关力量并且与起始的裂缝阻止 FGM 的材料失败有用的理论参考书。有限压力地的大小取决于相关参数,例如裂缝长度,在二个平行裂缝之间的距离,描述 FGM 的参数,事件波浪的频率和材料的格子参数。 | Jun Liang Shiping Wu Shanyi Du Center for Composite Materials and Structure,Harbin Institute of Technology,Harbin 150001,China | 2007 | Acta Mechanica Sinica2007，23，4： | 5 |
| 14 | HIGH STRAIN RATE SUPERPLASTICITY IN A SiC_w/2024Al COMPOSITE MADE BY SQUEEZE CASTING显示文摘In this paper,the superplastic characteristics of the beta-SiC whisker reinforced 2024aluminum composite, fabricated by squeeze casting and hot-rolling after extrusion were investigated. The compsite had a fine grain size of about 2μm, and exhibited a strain rate sensitivity of about 0.35 and a maximum elongation of 350% at an initial strain rate of 1.1×10-1s-1 at 803K. In addition, the superplastic deformation mechanisme of the composite were also examined. | X.J.Xu D. Zhang Z.L. Shi C.Z.Zhao and R.J. Wu (State Key Laboratory of Metal Matrir Composites, Shanghai Jiaotong University, Shanghai 200030, China) | 1998 | Acta Metallurgica Sinica(English Letters)1998，11，4： | 4 |
| 15 | Oxidation Protective C/SiC/Si-SiC Multilayer Coating for Carbon/Carbon Composites Applying at 1873 K显示文摘A C/SiC/Si-SiC multilayer coating for protecting carbon/carbon(C/C) composites against oxidation was prepared by slurry and pack cementation.X-ray diffraction(XRD) and energy dispersive spectroscopy(EDS) analysis showed that the inner coating obtained from the slurry and pack cementation was a C/SiC gradient layer acting as bonding layer,and the exterior coating formed in the second pack cementation was a Si-SiC double phase coating.Oxidation tests at 1873 K in air showed that the coating exhibited excellent oxidation protective ability and thermal shock resistance.The coating could effectively protect C/C composites from oxidation at 1873 K in air for 170 h and undergo the thermal cycling between 1873 K and room temperature for 8 cycles.The weight loss of the coated C/C composites is due to the formation of cracks and holes in the coating and the volatilization of SiO2 glass at high temperature. | Yulei Zhang,Hejun Li,Xinfa Qiang and Kezhi Li C/C Composites Research Center,State Key Laboratory of Solidification Processing,Northwestern Polytechnical University,Xi an 710072,China | 2010 | Journal of Materials Science & Technology2010，26，12： | 4 |
| 16 | A New Method to Track Resin Flow Fronts in Mold Filling Simulation of RTM Process显示文摘A new method to track resin flow fronts, referred to as the topological interpolated method (TIM), which is based on filling states and topological relations of adjacent nodes was proposed. An experiment on the mould filling process was conducted. It was compared with exact solutions and the experimental results, and good agreements were observed. Numerical and experimental comparisons with the conventional contour method were also carried out, and it showed that TIM could enhance the local accuracy of flow front solutions with respect to the contour method when merging flow fronts and resin approaching the mold wall were involved. | Fuhong DAI Shanyi DU Boming ZHANG Dianfu WAN Ceater for Composite Materials, Harbin Institute of Technology,Harbin 150001,China | 2004 | Journal of Materials Science & Technology2004，20，3： | 4 |
| 17 | Valence electron structure and bonding features of RuB2 and OSB2: The empirical electron theory calculations显示文摘The valence electron structure (VES) of RuB2 and OsB2 were calculated by the empirical electron theory (EET) of solids and molecules and compared with the results derived from the first-principles calculations. The distributions of covalent electrons in different bonds indicate that B-B and B-Me have remarkably covalent bonding characters. Lattice electrons cruising around Me-Me layers are found to have great influences on electronic conductivity and high temperature plasticity. The ultra-high values of elastic constant Cn in the two compounds originate from close-packed covalent bonding along the c axis. Uneven bond strengths and distributions of covalent bonds, especially for B-Afe bonds, yield significant anisotropy. Low ratios of lattice electrons to covalent electrons suggest the intrinsic embrittlement in crystals. The fact that the calculated cohesive energies well agree with experimental results demonstrates the good suitability of the EET calculations in estimating cohesive energy for transition-metal borides. | LUO XiaoGuang, LI JinPing, HU Ping & DONG ShanLiang Center for Composite Materials, Harbin Institute of Technology, Harbin 150001, China | 2010 | Science China(Technological Sciences)2010，53，7： | 4 |
| 18 | A macro-mechanical constitutive model for shape memory polymer显示文摘It is of theoretical and engineering interest to establish a macro-mechanical constitutive model of the shape memory polymer (SMP), which includes the mechanical constitutive equation and the material parameter function, from the viewpoint of practical application. In this paper, a new three-dimensional macro-mechanical constitutive equation, which describes the mechanical behaviors associated with the shape memory effect of SMP, is developed based on solid mechanics and the viscoelasticity theorem. According to the results of the DMA test, a new material parameter function is established to express the relationship of the material parameters and temperature during the glass transition of SMP. The new macro-mechanical constitutive equation and material parameter function are used to numerically simulate the process producing the shape memory effect of SMP, which includes deforming at high temperature, stress freezing, unloading at low temperature and shape recovery. They are also used to investigate and analyze the influences of loading rate and temperature change rate on the thermo-mechanical behaviors of SMP. The numerical results and the comparisons with Zhou’s material parameter function and Tobushi’s mechanical constitutive equation illustrate that the proposed three-dimensional macro-mechanical constitutive model can effectively predict the thermo-mechanical behaviors of SMP under the state of complex stress. | ZHOU Bo 1,2* , LIU YanJu 3 & LENG JinSong 2 1 College of Aerospace and Civil Engineering, Harbin Engineering University, Harbin 150001, China 2 Center for Composite Materials and Structures, Harbin Institute of Technology, Harbin 150080, China 3 Department of Aerospace Science and Mechanics, Harbin Institute of Technology, Harbin 150001, China | 2010 | Science China(Physics,Mechanics & Astronomy)2010，53，12： | 3 |
| 19 | Microstructure of Cu_(60)Zr_(20)Ti_(20) bulk metallic glass rolled at different strain rates显示文摘The structural evolution of Cu60Zr20Ti20 bulk metallic glass during rolling at different strain rates and cryogenic temperature was investigated by X-ray diffraction (XRD),differential scanning calorimetry (DSC) and high-resolution transmission electron microscopy (HRTEM). It is revealed that the deformation-induced transformation is strongly dependent on the strain rate. At the lowest experimental strain rate of 1.0×10-4 s-1,no phase transformation occurs until the highest deformation degree reaches 95%. In a strain rate range of 5.0×10-4-5.0×10-2 s-1,phase separation oc-curs in a high deformation degree. As the strain rate reaches 5.0×10-1 s-1,phase separation and nanocrystallization concur. The critical deformation degree for oc-currence of phase transformation decreases with the strain rate increasing. | LI JinFu,CAO QingPing & ZHOU YaoHe State Key Laboratory of Metal Matrix Composites,School of Materials Science and Engineering,Shanghai Jiao Tong University,Shanghai 200030,China | 2008 | Science China(Physics,Mechanics & Astronomy)2008，51，4： | 3 |
| 20 | Effect of slow monomer addition on molecular parameters of hyperbranched polymers synthesized in the presence of multifunctional core molecules显示文摘This study develops the kinetics for the slow monomer addition technique in the synthesis of hyperbranched polymers. Taking the conversion of monomer (x) as a variable, we derived the analytic expressions of molecular size distribution function, average degree of polymerization, polydispersity index and degree of branching. These expressions are not only amenable to the polymerization with high monomer conversion, but also appropriate to describe the whole polymerization process. Comparison with the one-pot polymerization indicates that the slow monomer addition technique improves the molecular weight distribution and increases the degree of branching for the products obtained. | ZHOU ZhiPing1, Jia ZhengWei1 & YAN DeYue2 1School of Materials Science and Engineering, Jiangsu University, Zhenjiang 212013, China 2State Key Laboratory of Metal Matrix Composites, Shanghai Jiao Tong University, Shanghai 200240, China | 2010 | Science China Chemistry2010，53，4： | 3 |
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