期刊：
Materials and Design,2011年32(4):2149-2156 ISSN：0261-3069
通讯作者：
Xiao, Y.-P.(xiaoyanping204@hotmail.com)
作者机构：
[ Pan, Qing-Lin ; Xiao, Yan-Ping ; He, Yun-Bin ; Li, Wen-Bin ; Liu, Xiao-Yan ] School of Materials Science and Engineering, Central South University, Changsha 410083, China;[ Pan, Qing-Lin ] Key Laboratory of Nonferrous Materials Science and Engineering of Ministry of Education, Changsha 410083, China;[ Li, Wen-Bin ] School of Civil Engineering, Hunan City University, Yiyang 413000, China
通讯机构：
[Xiao, YP] Cent S Univ, Sch Mat Sci & Engn, Changsha 410083, Peoples R China.
关键词：
Al-Zn-Mg-Cu alloy - Corrosion behaviour - E. Corrosion - Exfoliation corrosion - F. Microstructure - Grain boundary precipitate - Intergranular corrosion - Loss of strength - Nonferrous metals and alloys - Optical microscopes - Retrogression and reaging - Transmission electron microscope
摘要：
Influence of retrogression and re-aging treatment on the microstructure, strength, exfoliation corrosion, inter-granular corrosion and stress corrosion cracking of an Al-Zn-Mg-Cu alloy has been investigated by means of optical microscope (OM), transmission electron microscope (TEM) and electrochemical impedance spectroscopy (EIS). The results show that retrogression and re-aging treatment can increase the size and the distribution discontinuity of the grain boundary precipitates, and lead to the increase of the corrosion resistance without the loss of strength and ductility. In addition, the analysis of electrochemical impedance spectroscopy shows that retrogression and re-aging treatment can enhance the resistance to exfoliation corrosion. Crown Copyright (C) 2010 Published by Elsevier Ltd. All rights reserved.
作者：
Li Wenbin;Pan Qinglin;Xiao Yanping;He Yunbin;Liu Xiaoyan
期刊：
Transactions of Nonferrous Metals Society of China,2011年21(10):2127-2133 ISSN：1003-6326
通讯作者：
Pan, Q.-L.(pql@mail.csu.edu.cn)
作者机构：
[Pan Qinglin; He Yunbin; Liu Xiaoyan; Li Wenbin; Xiao Yanping] School of Materials Science and Engineering, Central South University, Changsha 410083, China;[Li Wenbin] School of Civil Engineering, Hunan City University, Yiyang 413000, China
通讯机构：
[Pan, QL] Cent S Univ, Sch Mat Sci & Engn, Changsha 410083, Hunan, Peoples R China.
摘要：
The microstructural evolution and composition distribution of an Al-Zn-Cu-Mg-Sc-Zr alloy during homogenization were investigated by optical microscopy(OM),scanning electron microscopy(SEM),energy dispersive spectrometry(EDS),X-ray diffraction(XRD) and differential scanning calorimetry(DSC).The results show that severe dendritic segregation exists in Al-Zn-Cu-Mg-Sc-Zr alloy ingot.There are a lot of eutectic phases at grain boundary and the distribution of the main elements varies periodically along interdendritic region.The main eutectic phases at grain boundary are Al7Cu2Fe phase and T(Al2Mg3Zn3).The residual phases are dissolved into the matrix gradually during homogenization with increasing temperature and prolonging holding time,which can be described by a constitutive equation in exponential function.The overburnt temperature of the alloy is 473.9 ℃.The optimum parameters of homogenization are 470 ℃ and 24 h,which is consistent with the result of homogenization kinetic analysis.
作者：
Cao, Guo Hui;Zhang, Sheng;Zhang, Wang;Peng, Xi Rong
期刊：
KSCE Journal of Civil Engineering,2017年22(2):688-695 ISSN：1226-7988
通讯作者：
Cao, Guo Hui(cgfcivil@163.com)
作者机构：
[Zhang, Wang; Zhang, Sheng] College of Civil Engineering and Architecture, Changsha University of Science and Technology, Hunan;[Zhang, Wang; Zhang, Sheng] 410114, China;[Peng, Xi Rong; Cao, Guo Hui] College of Civil Engineering, Hunan City University, Hunan;[Peng, Xi Rong; Cao, Guo Hui] 413000, China;413000, China
作者：
Ting Du 杜婷#&#&#Weihong Wang;Zhongxin Liu;Huaili Lin;Taiping Guo
期刊：
Wuhan University of Technology. Journal (Material Science Edition),2010年25(05):862-865 ISSN：1000-2413
通讯作者：
Du, T.(duting@mail.hust.edu.cn)
作者机构：
[Ting Du 杜婷#&#&#Weihong Wang] School of Civil Engineering and Mechanics, Huazhong University of Science and Technology, Wuhan 430074, China;[Zhongxin Liu; Huaili Lin] Commercial Concrete Company of No.3 Construction Bureau of China, Wuhan 430070, China;[Ting Du 杜婷#&#&#Weihong Wang; Wang, Weihong; Taiping Guo] School of Civil Engineering, Hunan City College, Yiyang 413000, China
摘要：
The mechanical performance of recycled aggregate concrete (RAC) is investigated. An experiment on the complete stress-strain curve under uniaxial compression loading of RAC is carried out. The experimental results indicate that the peak stress, peak strain, secant modulus of the peak point and original point increase with the strength grade of RAC enhanced. On the contrary, the residual stress of RAC decreases with the strength grade enhancing, and the failure of RAC is often broken at the interface between the recycled aggregate and the mortar matrix. Finally, the constitutive model of stress-strain model of RAC has been constituted, and the results from the constitutive model of stress-strain meet the experiment results very well.
作者：
Hong Liang;Zhou Zi-long;Yin Tu-bing;Liao Guo-yan;Ye Zhou-yuan
期刊：
Journal of Central South University of Technology (English Edition),2009年16(04):677-682 ISSN：1005-9784
通讯作者：
Hong, L
作者机构：
[Hong Liang; Yin Tu-bing; Liao Guo-yan; Ye Zhou-yuan; Zhou Zi-long] School of Resources and Safety Engineering, Central South University, Changsha 410083, China;[Hong Liang] Department of Civil Engineering, Hunan City University, Yiyang 413000, China
通讯机构：
[Hong, L] Cent S Univ, Sch Resources & Safety Engn, Changsha 410083, Peoples R China.
作者：
Li Xi-bing;Hong Liang;Yin Tu-bing;Zhou Zi-long;Ye Zhou-yuan
期刊：
Journal of Central South University of Technology (English Edition),2008年15(02):218-223 ISSN：1005-9784
通讯作者：
Li, XB
作者机构：
[Hong Liang; Li Xi-bing; Yin Tu-bing; Ye Zhou-yuan; Zhou Zi-long] School of Resources and Safety Engineering, Central South University, Changsha 410083, China;[Hong Liang] Department of Civil Engineering, Hunan City University, Yiyang 413000, China
通讯机构：
[Li, XB] Cent S Univ, Sch Resources & Safety Engn, Changsha 410083, Peoples R China.
关键词：
rock failure;Hopkinson pressure bar;diameter;minimum loading rate;medium strain rate
摘要：
In order to investigate the relationship between bar diameter and loading rate of the split Hopkinson pressure bar(SHPB) setup under the failure of rock specimen and realize the medium strain rate loading of specimen, new SHPB setups with different elastic bar's diameters of 22, 36, 50 and 75 mm were constructed. The tests were carried out on these setups at different loading rates, and the specimens had the same diameter of elastic bars and same ratio of length to diameter. The test results show that the larger the elastic bar's diameter is, the less the loading rate is needed to cause specimen failure, they show good power relationship, and that under the same strain rate loading, specimens are broken more seriously with larger diameter SHPB setup than with smaller one.
期刊：
Journal of Central South University of Technology (English Edition),2012年19(4):1148-1154 ISSN：1005-9784
通讯作者：
Li, Y.(liyunliuji@163.com)
作者机构：
[Liu, Ji ; Li, Yun ] College of Civil Engineering, Hunan City University, Yiyang 413000, China;[Liu, Ji ] School of Civil Engineering and Mechanics, Central South University of Forestry and Technology, Changsha 410004, China
通讯机构：
[Li, Y] Hunan City Univ, Coll Civil Engn, Yiyang 413000, Peoples R China.
摘要：
The response surface method (RSM) is one of the main approaches for analyzing reliability problems with implicit performance functions. An improved adaptive RSM based on uniform design (UD) and double weighted regression (DWR) was presented. In the proposed method, the basic principle of the iteratively adaptive response surface method is applied. Uniform design is used to sample the fitting points. And a double weighted regression system considering the distances from the fitting points to the limit state surface and to the estimated design points is set to determine the coefficients of the response surface model. Compared with the conventional approaches, the fitting points selected by UD are more representative, and a better approximation in the key region is also observed with DWR. Numerical examples show that the proposed method has good convergent capability and computational accuracy.
作者：
Xiao, Y. P.;Pan, Q. L.;Li, W. B.;Liu, X. Y.;He, Y. B.
期刊：
MATERIALS AND CORROSION-WERKSTOFFE UND KORROSION,2012年63(5):421-430 ISSN：0947-5117
通讯作者：
Xiao, YP
作者机构：
[Pan, Q. L.] Key Laboratory of Nonferrous Materials Science and Engineering, Ministry of Education, Changsha 410083, China;[Li, W. B.] School of Civil Engineering, Hunan City University, Yiyang 413000, China;[Xiao, Y. P.; He, Y. B.; Li, W. B.; Liu, X. Y.; Pan, Q. L.] School of Materials Science and Engineering, Central South University, Changsha 410083, China
通讯机构：
[Xiao, YP] Cent S Univ, Sch Mat Sci & Engn, Changsha 410083, Peoples R China.
期刊：
Journal of Central South University of Technology (English Edition),2011年18(4):1139-1143 ISSN：1005-9784
通讯作者：
Zhou, Z.-L.(zlzhou@mail.csu.edu.cn)
作者机构：
[Zhou, Zi-Long ; Liu, Zhi-Xiang ; Li, Qi-Yue ] School of Resources and Safety Engineering, Central South University, Changsha 410083, China;[ Hong, Liang ] Department of Civil Engineering, Hunan City University, Yiyang 413000, China
通讯机构：
[Zhou, ZL] Cent S Univ, Sch Resources & Safety Engn, Changsha 410083, Hunan, Peoples R China.
关键词：
Calibration factors - Impact velocities - Linear relation - Measurement calibration - Misalignment impact - Peak values - Special shape striker - Split Hopkinson pressure bars - Stress history - System calibration - Wave characteristics - Wave dispersion - Wave distortion - Wave forms
摘要：
In order to present basic guidance for system calibration of split Hopkinson pressure bar (SHPB) with the special shape striker, wave characteristics and dynamic responses of SHPB under striker impact were analyzed. Stress generated by the special shape striker tends to have a half-sine waveform and has little wave dispersion during its propagation. Impact velocities of the special shape striker and peak values of generated stress still have linear relation but with a different coefficient from that of cylindrical strikers. From stress histories on the surfaces of the input bar impacted by the special shape striker off-axially and obliquely, it is found that the misalignment impacts usually trigger wave distortion and amplitude decrease, which can be used to identify the poor system adjustment. Finally, the system calibration of SHPB with the special shape striker can be classified into four steps: system adjustment, wave distortion identification, measurement calibration and transmission calibration, where the measurement calibration factor and transmission calibration factor are elaborated and redefined.
期刊：
Journal of Central South University of Technology (English Edition),2011年18(2):279-284 ISSN：1005-9784
通讯作者：
Pan, Q.-L.(pql@mail.csu.edu.cn)
作者机构：
[ Pan, Qing-Lin ; He, Yun-Bin ; Liu, Xiao-Yan ; Li, Wen-Bin ; Xiao, Yan-Ping ] School of Materials Science and Engineering, Central South University, Changsha 410083, China;[Li, Wen-Bin ] School of Civil Engineering, Hunan City University, Yiyang 413000, China
通讯机构：
[Pan, QL] Cent S Univ, Sch Mat Sci & Engn, Changsha 410083, Peoples R China.
关键词：
Aging conditions - Aging parameter - Al-Zn-Cu-Mg-Sc-Zr alloy - Conductivity measurements - GP zones - Hardness test - matrix - Microstructure and mechanical properties - Properties and microstructures - Retrogression and reaging - Retrogression time - T6 temper - TEM - Tensile tests
作者：
Wenbin Li;Qinglin Pan;Liang Zou;Wenjie Liang;Yunbin He;Junsheng Liu
期刊：
Rare Metals,2009年28(1):102-106 ISSN：1001-0521
通讯作者：
Li, W.(liwenbin.1963@163.com)
作者机构：
[Yunbin He; Liang Zou; Qinglin Pan; Junsheng Liu; Wenjie Liang; Wenbin Li] School of Materials Science and Engineering, Central South University, Changsha 410083, China;[Wenbin Li] Department of Civil Engineering, Hunan City University, Yiyang 413000, China
通讯机构：
[Li, WB] Cent S Univ, Sch Mat Sci & Engn, Changsha 410083, Hunan, Peoples R China.
摘要：
Five kinds of Al-Zn-Mg-Cu-Zr based alloys with different Sc additions were prepared by ingot metallurgy. The effects of minor Sc on the microstructure and mechanical properties of Al-Zn-Mg-Cu-Zr based alloys were investigated using tensile tests, optical microscopy (OM), and transmission electron microscopy (TEM). The results show that the ultimate tensile strength and yield strength are improved by 94 and 110 MPa, respectively, and the elongation to failure remains at a reasonable extent (11.1%) in the Al-Zn-Mg-Cu-Zr based alloy with 0.21 wt.% Sc addition after solution heat treatment at 475°C for 40 min and then aged at 120°C for 24 h. The addition of minor Sc induces the formation of Al<inf>3</inf>(Sc,Zr) particles, which are highly effective in refining the cast microstructures, retarding recrystallization, and pinning dislocations. The increment of strength is attributed mainly to fine grain strengthening, precipitation strengthening of Al<inf>3</inf>(Sc,Zr) particles, and substructure strengthening.
作者：
Liu Xi-ling;Li Xi-bing;Hong Liang;Yin Tu-bing;Rao Meng
期刊：
Journal of Central South University,2015年22(9):3571-3577 ISSN：2095-2899
通讯作者：
Liu, XL
作者机构：
[Li Xi-bing; Rao Meng; Yin Tu-bing; Liu Xi-ling] School of Resources and Safety Engineering, Central South University, Changsha, China;[Liu Xi-ling] Norman B. Keevil Institute of Mining Engineering, University of British Columbia, Vancouver, Canada;[Hong Liang] School of Civil Engineering, Hunan City University, Yiyang, China
通讯机构：
[Liu, XL] Cent S Univ, Sch Resources & Safety Engn, Changsha 410083, Peoples R China.
摘要：
Acoustic emission tests were performed using a split Hopkinson pressure bar system (SHPB) on 50-mm-diameter bars of granite, limestone, sandstone and skarn. The results show that the amplitude distribution of hits is not well centralized around 50 dB, and that some hits with large amplitudes, usually larger than 70 dB, occur in the early stages of each test, which is different from the findings from static and low-loading-rate tests. Furthermore, the dominant frequency range of the recorded acoustic emission waveforms is between 300 kHz and 500 kHz, and frequency components higher than 500 kHz are not significant. The hit with the largest values of amplitude, counts, signal strength, and absolute energy in each test, displays a waveform with similar frequency characteristics and greater correlation with the waveform obtained from the elastic input bar of the split Hopkinson pressure bar system compared with the waveforms of the other hits. This indicates that the hit with the largest values of amplitude, counts, signal strength, and absolute energy is generated by elastic wave propagation instead of fracture within the rock specimen.
摘要：
Cast-in-place concrete large-diameter pipe pile (referred to as PCC pile) is widely used for pile-supported embankment over soft soils in China. However, the studies focused on the sliding stability and calculated method of this new pile type under lateral load was relatively little. Therefore, base on PCC pile-supported embankments in the eastern coastal region of China case study, undrained shear strength, conventional p-y criteria, and modified pile modulus are recommended for lateral bearing capacity calculation basing on LPILE plus 5.0. The correctness of calculated method is verified by comparing the results on lateral load versus pile top deflection with those obtained by field test. The performances of drilled shaft with the same out-diameter, and PCC pile without considering pile core soils are also carried out for comparative analysis. The result shows that the performances of PCC piles under lateral load can be calculated through LPILE software with conventional p-y criteria of drilled shaft, and modified modulus of piles. The result also shows that when comparing with conventional drilled shaft with the same out-diameter, the lateral bearing capacity of PCC pile is reduced nearly about 20 %, while with nearly about 60 % concrete usage are saved. The results of this paper can provide design and calculation guide for practical PCC pile used for landslide disaster treatment under lateral load in United States.
摘要：
A novel electrochemical sensor for nonenzymatic hydrogen peroxide (H2O2) detecting based on facile synthesis of copper oxide (CuO) nanoparticles dopping into graphene sheets@cerium oxide nanocomposites sensitized screen printed electrode (SPE) was fabricated. CuO nanoparticles were dopped into GS@CeO2 nanocomposites via a facile solvothermal process. X-ray powder diffractometer (XRD) combines with fourier transform infrared spectroscopy (FTIR) were used to characterize the composition of GS@CeO2-CuO nanocomposites. Electrochemical impedance spectroscopy (EIS) was utilized to study the interfacial properties as well as scanning electron microscopy (SEM) was employed to characterize the morphologies of different electrodes. The electrochemical properties of electrochemical sensor were investigated by cyclic voltammetry (CV) and chronoamperometry (i-t curve) methods. After all experimental parameters were optimized, the GS@CeO2-CuO hybrid nanomaterials modified SPE (SPE I GS@CeO2-CuO) showed a good performance towards the electrocatalytic reduction of H2O2. A wide linear detection range (LDR) of CV peaks from 5.0x 10(-3) mM to 18.0 mM (R=0.9994) and a low limit of detection (LOD) of 2.1 x 10(-3) mM (S/N=3) was achieved. The proposed electrochemical sensor was quick, selective, sensitive, simple, stable and reliable to quantitative determination of trace H2O2 in real samples.
作者：
Li Wen-bin;Pan Qing-lin;Liu Jun-sheng;Liang Wen-jie;He Yun-bin;Liu Xiao-yan
期刊：
Journal of Central South University of Technology (English Edition),2009年16(04):530-534 ISSN：1005-9784
通讯作者：
Pan, QL
作者机构：
[Pan Qing-lin; He Yun-bin; Liu Xiao-yan; Liang Wen-jie; Li Wen-bin; Liu Jun-sheng] School of Materials Science and Engineering, Central South University, Changsha 410083, China;[Li Wen-bin] Department of Civil Engineering, Hunan City University, Yiyang 413000, China
通讯机构：
[Pan, QL] Cent S Univ, Sch Mat Sci & Engn, Changsha 410083, Peoples R China.
关键词：
Al-Zn-Cu-Mg-Sc-Zr alloy;hot deformation;flow softening;microstructural evolution;activation energy
期刊：
TRANSPORTATION LETTERS-THE INTERNATIONAL JOURNAL OF TRANSPORTATION RESEARCH,2015年7(4) ISSN：1942-7867
通讯作者：
Zhang, JF
作者机构：
[Long, Q.; Zhang, J. -F.; Zhou, Z. -M.] Hunan City Univ, Sch Civil Engn, Yiyang 413000, Hunan, Peoples R China.
通讯机构：
[Zhang, JF] Hunan City Univ, Sch Civil Engn, Yiyang 413000, Hunan, Peoples R China.
关键词：
Multi-objective model;Traffic management strategy;Intersection signal controlling;Fuzzy analytic process;Q-learning algorithm
摘要：
Traffic signals are one of the main traffic management tools used to control traffic flow on the roads and should reflect traffic managers' intentions in different tasks. This paper showed a multi-objective optimization model, and its algorithm was aimed at the intricate structure of traffic control. First, the indexes of queuing lengths, delay times, and stop times were chosen as the evaluation indexes of optimization model. Second, the weight of the optimization indexes was confirmed with a fuzzy analytic process (FAP) according to the traffic managers' strategy. Finally, the multi-objective optimization model was solved with the Q-learning algorithm, and thus the signal control scheme of the intersection was produced in real-time while considering the traffic management strategy. The results of the simulation showed that the method could effectively improve traffic efficiency at the intersection, and at the same time, the intentions of the traffic managers could be fully embodied.
关键词：
Toader mean;arithmetic mean;quadratic mean;contraharmonic mean;complete elliptic integral
摘要：
In this paper, we present the best possible Toader mean bounds of arithmetic and quadratic means by the one-parameter quadratic and contraharmonic means. As applications in engineering and technology, we find new bounds for the complete elliptic integral of the second kind. (C) 2016 All rights reserved.
期刊：
Journal of Central South University of Technology (English Edition),2010年17(02):381-387 ISSN：1005-9784
通讯作者：
Jiang, J.-Q.(lh201314@163.com)
作者机构：
[蒋建清; 杨果林] School of Civil and Architectural Engineering, Central South University, Changsha 410075, China;[蒋建清] School of Civil Engineering, Hunan City University, Yiyang 413000, China
通讯机构：
[Jiang, JQ] Cent S Univ, Sch Civil & Architectural Engn, Changsha 410075, Hunan, Peoples R China.
关键词：
red-sandstone;large-scale;red-sandstone;large-scale field test;mechanical characteristic;strength parameter
期刊：
Renewable and Sustainable Energy Reviews,2018年82:2768-2778 ISSN：1364-0321
通讯作者：
Gong, Guangcai(gcgong@hnu.edu.cn)
作者机构：
[ Shi, Ying ; Xiang, Xianan ] School of Municipal and Geomatics Engineering, Hunan City University, Yiyang;[ Shi, Ying ; Xiang, Xianan ] 413000, China;[ Wang, Chenhua ; Cai, Youchan ] School of Architecture and Construction, University of South China, Hengyang;[ Wang, Chenhua ; Cai, Youchan ] 421001, China;[Xiang, Xianan ; Gong, Guangcai ] School of Civil Engineering, Hunan University, Changsha
