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| 1 | Molecular dynamics simulations on the structures and properties of ε-CL-20-based PBXs ——Primary theoretical studies on HEDM formulation design显示文摘Five polymer bonded explosives (PBXs) with the base explosive ε-CL-20 (hexanitrohexaazaisowurtzi- tane), the most important high energy density compound (HEDC), and five polymer binders (Estane 5703, GAP, HTPB, PEG, and F2314) were constructed. Molecular dynamics (MD) method was employed to investigate their binding energies (Ebind), compatibility, safety, mechanical properties, and energetic properties. The information and rules were reported for choosing better binders and guiding formula- tion design of high energy density material (HEDM). According to the calculated binding energies, the ordering of compatibility and stability of the five PBXs was predicted as ε-CL-20/PEG > ε-CL-20/ Estane5703 ≈ε-CL-20/GAP > ε-CL-20/HTPB > ε-CL-20/F2314. By pair correlation function g(r) analyses, hydrogen bonds and vdw are found to be the main interactions between the two components. The elasticity and isotropy of PBXs based ε-CL-20 can be obviously improved more than pure ε-CL-20 crystal. It is not by changing the molecular structures of ε-CL-20 for each binder to affect the sensitivity. The safety and energetic properties of these PBXs are mainly influenced by the thermal capability (C°p) and density (ρ) of binders, respectively. | XU XiaoJuan1,2, XIAO JiJun1, HUANG Hui3, LI JinShan3 & XIAO HeMing1 1 Department of Chemistry, Nanjing University of Science and Technology, Nanjing 210094, China 2 Department of Chemistry, Yancheng Teacher’s College, Yancheng 224002, China 3 Institute of Chemical Materials, China Academy of Engineering Physics, Mianyang 621900, China | 2007 | Science China Chemistry2007，50，6： | 15 |
| 2 | Effect of heat treatment on microstucture and properties of explosive welding clad plate of TA1/Q345显示文摘The composite plate made by explosion welding technology generally has high residual stress and bed plasticity due to the explosion reinforcement. The heat treatment can play a part of eliminating stress and recovering property.In this study,TA1/Q345 clad plate made by explosive welding was annealed at different temperatures.The microstructure,micro-hardness,and tensile,shear,and bending properties were analyzed after anneal.The result shows that there is fibrous structure in the bonding zone and the plastic deformation is severe,the grain growth and fibrous structure dribbles away with the temperature increasing.Micro-hardness in the interface is bigger than it on the both sides. Tensile and shear strength reduced with the temperature of heat treatment increasing.The propel anneal temperature for TA1/Q345 clad plate is 600 | 张敏 张涛 蔡俊清 刘娟娟 李继红 | 2018 | China Welding2018，27，1： | 11 |
| 3 | Degradation behavior of concrete under corrosive coal mine environment显示文摘Experimental investigations were taken for the degradation of concrete under coupling effects of hydrochloric acid mist and mixed salt mist consisting of chlorine and sulfate and carbon dioxide according to coal mine environment. Concrete specimens were subjected to four different deterioration time from 45 days to 180 days, with an interval of 45 days. The results showed that the carbonization depth of concrete increased speedy at first, then gently and then rapidly again with the change of fragility.The compressive strength of concrete increased at the initial stage of deterioration, and then decreased until the time of 135 days when they came to the second ascension of small quantity and then entered the decline trend under the coupling effect of carbonization and acid-salt attack. The elastic modulus changed slightly with the deterioration, meanwhile the fragility and ductility changed significantly before and after deterioration time of 180 days, which was identical to the failure modes. | Shuchun Zhou Henglin Lv Yuanzhou Wu | 2019 | International Journal of Mining Science and Technology2019，29，2： | 6 |
| 4 | Effects of SiC Nanoparticle Content on the Microstructure and Tensile Mechanical Properties of Ultrafine Grained AA6063-SiC_(np) Nanocomposites Fabricated by Powder Metallurgy显示文摘Ultrafine grained AA6063-SiC_(np) nanocomposites with 1, 5 and 10 vol.% SiC_(np) have been fabricated by a novel powder metallurgy process. This process combines high energy ball milling of a mixture of 6063 alloy granules made from machining chips and Si C nanoparticles and thermomechanical powder consolidation by spark plasma sintering and hot extrusion. The microstructure and tensile mechanical properties of the samples were investigated in detail. Increasing the Si C nanoparticle content from 1 to 10 vol.%,the yield strength and ultimate tensile strength increased from 296 and 343 MPa to 545 and 603 MPa respectively, and the elongation to fracture decreased from 10.0%, to 2.3%. As expected, a higher Si C nanoparticle content generates a stronger inhibiting effect to grain growth during the thermomechanical powder consolidation process. Analysis of the contributions of various strengthening mechanisms shows that a higher Si C nanoparticle content leads to a higher contribution from nanoparticle strengthening, but grain boundary strengthening still makes the largest contribution to the strength of the nanocomposite.When the Si C nanoparticle content increased to 10 vol.%, the failure of the nanocomposite was initiated at weakly-bonded interparticle boundaries(IPBs), indicating that with a high flow stress during tensile deformation, the failure of the material is more sensitive to the presence of weakly-bonded IPBs. | X.Yao Z.Zhang Y.F.Zheng C.Kong M.Z.Quadir J.M.Liang Y.H.Chen P.Munroe D.L.Zhang | 2017 | Journal of Materials Science & Technology2017，33，9： | 4 |
| 5 | Fabrication of Al-Coated Mg-Li Alloy Sheet and Investigation of Its Properties显示文摘An Al-coated Mg-8 mass% Li alloy rectangular bar was fabricated by hot extrusion, and then, it was hot-rolled into a thin sheet. The Al coating was uniform in thickness and had good bonding with the substrate during all the processing. This Alcoated Mg–Li alloy exhibited a good corrosion resistance in a 0.5 mass% HCl aqueous solution. No intermetallic compound was observed at the Al/Mg–Li interface after the extrusion and the rolling. The Al-coated Mg–Li alloy sheet exhibited an elongation to fracture of 35% at room temperature at a strain rate of 0.001 s(-1)without any debonding between the coating and the substrate. When tensile tested at 573 K at 0.001 s(-1)in the air, the Al coating remained undamaged even until an elongation of about 150%. Further elongation generated cracks on the coating and the specimen fractured at an elongation of about 200%. In an Ar atmosphere, the specimen exhibited a fracture elongation of over 400% under the same conditions at 573 K at 0.001 s(-1), although a large number of cracks generated on the Al coating. | Tian-Long Zhang Toko Tokunaga Munekazu Ohno Mi-Lin Zhang Kiyotaka Matsuura | 2019 | Acta Metallurgica Sinica(English Letters)2019，32，2： | 3 |
| 6 | Improvement of the electrochemical performance of LiNi_(0.33)Mn_(0.33)Co_(0.33)O_2 cathode material by chromium doping显示文摘LiNi0.33Mn0.33-xCo0.33CrxO2 (x=0, 0.01, 0.025, 0.05) materials were synthesized by Cr3+ substitute of Mn4+ to enhance their electrochemical properties. The structure and electrochemical properties were characterized by X-ray diffraction (XRD), scanning electron microscope (SEM), cyclic voltammetry (CV), electrochemical impedance spectroscopy (EIS) and charge/dis charge tests. The materials maintained the α-NaFeO2 type layered structure and the discharge capacities were also increase by doping appropriate amount of Cr3+. The sample with x= 0.025 exhibited the highest discharge capability of 181.6 mAh g?1 and the best cycle performance. EIS measurement showed that the Cr-doped electrode had the lower resistance impedance increase during cycling. The chemical diffusion coefficient of Li+ ion (DLi) was measured by potentiostatic intermittent titration technique (PITT). The result showed that DLi in Cr-doped electrode was faster than that of the un-doped one. | WANG Meng1, CHEN YunBo1, WU Feng2, SU YueFeng2 & CHEN Lin1 1 Advanced Manufacture Technology Center, China Academy of Machinery Sicence and Technology, Beijing 100083, China 2 School of Chemical Engineering and Environment, Beijing Institute of Technology, Beijing 100081, China | 2010 | Science China(Technological Sciences)2010，53，12： | 2 |
| 7 | Using LIDAR and ground truth for landslide recognition and characterization of geotechnical and morphological parameters in sedimentary rocks,a case study in Northern Bavaria (Germany)显示文摘The use of LIDAR-derived shaded relief maps led to the identification of all potential landslide areas in a hilly region in Northern Bavaria(1590 km^2), Germany. Every possible structure was investigated by field investigation which resulted in a detailed database of 1002 landslides within the study area. The analysis of geological, lithological, topographical and morphological properties(spatial ratio, lithological and geological setting, length/width distribution, material properties and slope angle) revealed characteristic appearances of the landslides and possible relationships between different aspects. Strong relations between the lithological setting, spatial ratio of the mapped landslides and distribution of slope angle could be observed. This study shows the value of high-resolution shaded relief maps for detecting and mapping landslides in a large area with comparatively little work and time in comparison to the traditional approach to mapping. It reveals that many landslides were not known before. Landslides are much more common in Northern Bavaria and have a higher influence on the denudation rate of the Franconian Alb than expected before. | WIEDENMANN Johannes ROHN Joachim MOSER Michael | 2017 | Journal of Mountain Science2017，14，8： | 2 |
| 8 | MEASUREMENTAL RESEARCH ON THE MAGNETOMECHANICAL COUPLING PROPERTIES OF RARERARTH GIANT MAGNETOSTRICTION MATERIALS显示文摘The physical modelanditsequivalentcircuitoftestapparatusissetup by meansofimpedanceanalysis method. The magnetostriction coefficient, magnetomechanicalcoupling coefficient,frequency and anti- frequency of TbxDy1 - xFe2 - z(0 27 ≤x ≤0 3 ,0 ≤z ≤0 1) rod are measured. Somecoupling problems with mechanicalstress and electromagnetic field such as flux leakage in magnetic path are discussed. The comparing calculated with tested resultsshowsthe accuracyof measurementand thesimplification of model. | C.Y. Li1) , H.Q. Yuan2) , F.X. Meng3) and Z. Zhou4) 1) Institute of Liaoning Technology,Jinzhou 121001 ,China 2) Northeastern University ,Shenyang 10006 ,China 3) Shenyang University ,Shenyang 110044 ,China 4) Xincheng Rare Earth Magnetostrictive Mate | 1999 | Acta Metallurgica Sinica(English Letters)1999，12，4： | 2 |
| 9 | Patient-Specific Echo-Based Fluid-Structure Interaction Modeling Study of Blood Flow in the Left Ventricle with Infarction and Hypertension显示文摘Understanding cardiac blood flow behaviors is of importance for cardiovascular research and clinical assessment of ventricle functions.Patient-specific Echo-based left ventricle(LV)fluid-structure interaction(FSI)models were introduced to perform ventricle mechanical analysis,investigate flow behaviors,and evaluate the impact of myocardial infarction(MI)and hypertension on blood flow in the LV.Echo image data were acquired from 3 patients with consent obtained:one healthy volunteer(P1),one hypertension patient(P2),and one patient who had an inferior and posterior myocardial infarction(P3).The nonlinear Mooney-Rivlin model was used for ventricle tissue with material parameter values chosen to match echo-measure LV volume data.Using the healthy case as baseline,LV with MI had lower peak flow velocity(30%lower at beginejection)and hypertension LV had higher peak flow velocity(16%higher at begin-filling).The vortex area(defined as the area with vorticity>0)for P3 was 19%smaller than that of P1.The vortex area for P2 was 12%smaller than that of P1.At peak of filling,the maximum flow shear stress(FSS)for P2 and P3 were 390%higher and 63%lower than that of P1,respectively.Meanwhile,LV stress and strain of P2 were 41%and 15%higher than those of P1,respectively.LV stress and strain of P3 were 36%and 42%lower than those of P1,respectively.In conclusion,FSI models could provide both flow and structural stress/strain information which would serve as the base for further cardiovascular investigations related to disease initiation,progression,and treatment strategy selections.Large-scale studies are needed to validate our findings. | Longling Fan Jing Yao Chun Yang Di Xu Dalin Tang | 2018 | Computer Modeling in Engineering & Sciences2018，，2： | 2 |
| 10 | Joint formation mechanism of high depth-to-width ratio friction stir welding显示文摘High depth-to-width ratio friction stir welding is an attractive method for the joining demands of alum inum profiles, which is sparked with its extrem ely low heat input and high mechanical performance. In this study, the joint form ation mechanism was studied by a num erical model of plastic flow combined with experim ental approaches. A fluid-solid-interaction algorithm was proposed to establish the coupling model, and the material to be welded was treated as non-New tonian fluid. The thread structure and the milling facets on tool pin prom oted drastic turbulence of material. The thread structure converged the plasticized material by its inclined plane, and then drove the attached material to refill the welds. The milling facets brought about the periodic dynamic material flow. The thread structure and the milling facets increased the strain rate greatly under the extremely low heat input, which avoided the welding defects. The condition of the peak tem perature of 648 K and the strain rate of 151 s^-1 attributed to the lowest coarsening degree of precipitate. The tensile strength of the joint reached 265 MPa, equivalent to 86% of base material. The amelioration via the material flow model inhibits the welding defects and optimizes the param eter intervals, providing references to extracting process-structure-property linkages for friction stir welding. | Yongxian Huang Yuming Xie Xiangchen Meng Junchen Li Li Zhou | 2019 | Journal of Materials Science & Technology2019，35，7： | 2 |
| 11 | Investigation of nano-talc as a filling material and a reinforcing agent in high density polyethylene (HDPE)显示文摘An experiment of producing high density polyethylene (HDPE) nano-composite filled with 4wt.% talc was presented. Acting as filler and a reinforcing agent in the HDPE, talc powder, sized at around 5 μm, was surface-treated with aluminum diethylene glycol dinitrate coupling agent before adding to the HDPE. Analyses of the reinforced HDPE nano-composite show significant improvement in its mechanical properties including, tensile strength (>26 MPa), break elongation (<1.1%), flexural strength (>22 MPa), and friction coefficients<0.11. The results demonstrate that, after surface-treated, talc can be used as a promising filling material and a reinforcing agent in making HDPE nano-composite. | CHEN Nanchun MA Lei ZHANG Tao | 2006 | Rare Metals2006，25，z1： | 1 |
| 12 | Synthesis and characterization of LiCo_(1/3)Ni_(1/3)Mn_(1/3)O_2 prepared by Pechini process显示文摘Layered cathode material LiCo1/3Ni1/3Mn1/3O2 was synthesized by Pechini process, and investigated using X-ray diffraction (XRD), scanning electron microscopy (SEM) and galvanostatic charge/discharge cycling. The sample is well-crystallized and has a phase-pure a-NaFeO2 structure. The particle sizes are uniform, and distributed in the range of 20-200 nm. The initial discharge capacity of the Li/LiCo1/3Ni1/3Mn1/3O2 cell was about 149 mAh·g-1 when it was cycled at a voltage range of 4.5-2.3 V with a specific current of 0.25 mA. The result is better in comparison with solid-state solution method. The synthetic procedure was discussed. Three major reactions: chelation, esterification, and polymerization successively occurred. | LI Zhigang WANG Tiandiao KANG Xueya | 2006 | Rare Metals2006，25，z1： | 1 |
| 13 | RESEARCH A NEW TOOL STEEL AND ITS PROPERTIES FOR MAKING WOOD-CHIP CUTTING KNIVES显示文摘On the basis of analyses of service conditions and properties requirements of wood chip cutting knives, an alloying scheme was formulated and a kind of new tool steel was developed. Parameters for its heat treating process and mechanical properties were systematically investigated and optimized. Satisfactory results were obtained on the knives in practice. | X.N.Cheng,X.M.Luo and F.Jiang Department of Materials Engineering,Jiangsu University of Science and Technology,Nanjing 210013,China | 1999 | Acta Metallurgica Sinica(English Letters)1999，12，5： | 1 |
| 14 | Influence of synergistic effect of LiNi_(0.8)Co_(0.15)Al_(0.05)O_(2)@Cr_(2)O_(5)composite on the electrochemical properties显示文摘LiNi_(0.8)Co_(0.15)Al_(0.05)O_(2)@Cr_(2)O_(5)composite electrode combines the high rate-capability characteristics of NCA with the stability of Cr_(2)O_(5),playing a synergistic role in improving the cyclic stability,initial discharge capacity and the security of low cut-off voltage(2.0 V).When the mass ratio of Cr_(2)O_(5)in NCA is 45%(mass),the capacity retention rate increases from 58.5% without Cr_(2)O_(5)to 69.3% in the range of 2.0-4.3 V.The initial discharge capacity of NCA@Cr_(2)O_(5)composite material is 211.4 mA·h·g^(-1),its first coulombic efficiency is 94.2%,and the charging capacity remains approximately constant when mixed with 15%(mass)Cr_(2)O_(5).The reason for the improvement of the initial charge-discharge efficiency(ICDE)was explained.Impedance and cyclic voltammetry analysis reveal more detailed reasons of the observed improvements.Compared with NCA cathode material,the NCA@Cr_(2)O_(5)composite material can provide not only additional stable sites and channels for Li^(+)insertion/extraction to make up for the loss of active Li^(+)sites and prevent the accumulation of Li+in the circulation process,but also protect the NCA electrode from the corrosion of the electrolyte decomposition by the Cr_(2)O_(5)nanoparticles adhering to NCA interface. | Yunke Wang Yongjia Li Yenan Zhang Guozheng Zha Feng Liang Yongnian Dai Yaochun Yao | 2021 | Chinese Journal of Chemical Engineering2021，34，5： | 1 |
| 15 | Stresses of orthotropic laminated beams subjected to high temperature and mechanical load显示文摘Thermo-elastic analysis of simply-supported orthotropic laminated beams subjected to high temperature and mechanical load is presented on the basis of the exact two-dimensional thermoelasticity theory.The beam is composed of several orthotropic layers,each with temperaturedependent material properties.The governing equation for each layer is analytically solved using the state space method.The displacement and stress solutions of the beam are obtained using the transfer-matrix method.A numerical example is included to study the effects of temperature on the mechanical responses of a sandwich beam.The results reveal two main effects of temperature:(i)inducing deformations and stresses by itself;(ii)affecting the deformations and stresses induced by the mechanical load. | Zhong Zhang Ding Zhou Xiuli Xu Xuehong Li | 2019 | Theoretical & Applied Mechanics Letters2019，9，5： | 1 |
| 16 | Optimized design and preparation of Ti/TiAl laminated composite显示文摘Laminated composite is a new type of composite structure which is used to improve the fracture toughness and flexure strength and is good for optimizing the mechanical properties of intermetallics. On the basis of bionic principle, the optimized design (via establishing the mathematical model, stress intensity factor K_Ⅰ was computed by the finite element method) of Ti/TiAl laminated composite was studied by varying the thickness ratio and layer amounts, then the raw materials of Ti and TiAl were evaporated and deposited alternatively to form laminated metal/intermetallic composites in vacuum chamber by electron beam physical vapor deposition method. The results show that the toughness of TiAl is improved and agrees well with theoretical analysis. | 马李 赫晓东 李垚 | 2005 | 中国有色金属学会会刊:英文版2005，15，S3： | 1 |
| 17 | Experimental Study on theMechanical Properties ofPaste-like Fill Material显示文摘The experiments, which include the complete stress-strain curves, triaxial compressive loading history and the main factors affecting the compressive strength of the material, were made to research the mechanical properties of paste-like fill material. The results show that the material still has a relatively high load-bearing capacity after yielding. From the view of the backfill strength, the suitable content of the fine particles in the aggregates is 20%, the curing temperature of backfill slurry is about 20 centigrade degrees or higher. The backfill strength can reach 2.5-3.6 MPa when the binder dosage is 5%-8%. It can meet the needs for mining with backfill. | 黄玉诚 孙恒虎 | 2004 | Journal of China University of Mining and Technology2004，14，2： | 1 |
| 18 | Numerical Simulation Study on the Surface Deflection of Cylindrical Shallow Shell显示文摘The increasing applications of new materials such as high strength low alloy (HSAL) steels and aluminum alloy sheets have lead to greater focus on the surface deflections of auto body panels in the automobile industry in recent years.The finite element models of cylindrical shallow shell that can represent auto body panels are established.Numerical simulations of forming and unloading of cylindrical shallow shell are carried out.And a measurement and evaluation method of the surface deflection is introduced.The simulations of surface deflections with various blank homing forces (BHF) show great agreement with the experi- mental results.The influence laws of sheet thickness and material properties such as yield strengthσs,strain-hardening exponent n,anisotropy parameter r and strength coefficient k on the surface deflection are achieved by simulations,which give a basic refer- ence for controlling surface deflections. | XING Zhongwen~1 BAO Jun~1 LIU Zhongyuan~1 YANG Yuying~2 SUN Zhenzhong~2 1.School of Mechanical and Electrical Engineering,Harbin Institute of Technology,Harbin 150001,China 2.School of Materials Science and Engineering,Harbin Institute of Technology,Harbin 150001,China | 2006 | 武汉理工大学学报2006，28，S2： | 0 |
| 19 | CH_3NH_3 Formed by Electron Injection at Heterojunction Inducing Peculiar Properties of CH_3NH_3PbI_3 Material显示文摘The effect of formed CH_3NH_3 at the heterojunction on properties of CH_3NH_3PbI_3 material is investigated based on experiment and theoretical calculation. Our calculation results show that the giant dielectric constant, anomalous hysteresis and long-lasting polarization for CH_3NH_3PbI_3 originate from the formed CH_3NH_3 at the heterojunction. It is found that the induced weak EPS by the reorientation of CH_3NH_3 sub-group along the built-in electric field enables us to effectively increase the ordering of entire lead-halide framework. In addition, the heterojunction has an advantage of channel separation between carrier transport and electron diffusion. These properties of the heterojunction are the main origin of the high efficiency of CH_3NH_3PbI_3 solar cells. | 张翱 陈云琳 张春秀 闫君 | 2019 | Chinese Physics Letters2019，36，2： | 0 |
| 20 | Separator Material Chosen for MH/Ni Battery显示文摘The properties of MH/Ni batteries using different separator were studied.And then an idea for choosing separator for high-power MH/Ni battery was provided.Using the separator with grafting treatment, the storage characteristic, charge retention characteristic and anti-soft-short characteristic of high-power MH/Ni battery are improved.Wetlaid and spunfibre material meet different properties requirement of battery. | Xu Shaoping Ma Yijun Liang Wanlong Liu Dong Jia Chunming | 2004 | Journal of Rare Earths2004，22，z1： | 0 |
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