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- 저자 : Pengliang Liang (검색결과 4 건)
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Experimental Study on the Ultralow Cycle Fatigue Performance of Bolted Spherical Joint Specimens
Yanying Li,Haiwang Li,Pengliang Liang,Xingyu Wang 한국강구조학회 2023 International Journal of Steel Structures Vol.23 No.3
Under disastrous earthquake conditions, the bolted spherical joints in spatial steel grid structures are prone to bending, breaking, and other failure modes, and their failure has obvious ultralow cycle fatigue failure characteristics. In this paper, quasistatic tests were carried out on three groups (nine specimens in total) of bolted spherical joints with joints at both ends under uniaxial cyclic loading. The failure characteristics, hysteretic behaviour, bearing capacity degradation, stiffness degradation, and energy compression capacity of bolted spherical joints under three loading schemes were studied. At the same time, the change rule of the rotation angle with the number of cycles was obtained. The experimental study shows that each member experiences characteristic moments of high-strength bolt bending, cracking, crack propagation, and a loud crack and that bolt failure occurs at the middle bolt ball connection. The ultimate ultralow cycle fatigue failure of the specimen occurs after more than 10 cycles, and the energy compression capacity is poor due to the small volume of high-strength bolts and sleeves. The "pinching phenomenon" of the hysteresis curve of the bolted spherical joint is serious. The tension area of the hysteresis curve increases, and the fullness of the compression area decreases, with increasing tensile amplitude. Based on the cumulative energy compression, a damage model suitable for bolted spherical joints under cyclic loading is proposed. From the experimental data, a correlation formula between the angle change rate and the damage model was established when the middle bolt ball of the connection specimen experienced a tension–compression cyclic load. This formula provides a reference for the evaluation of bolted spherical joints of bolt ball grid structures after an earthquake.
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The enhancement of oxygen sensitivity of ZnO macropore film by functionalizing with azo pigment
Peng, Liang,Zhai, Jiali,Wang, Dejun,Zhang, Yu,Zhao, Qidong,Wang, Ping,Pang, Shan,Fan, Zhiyong,Xie, Tengfeng Korean Society of Photoscience 2009 Photochemical & photobiological sciences Vol.8 No.6
Azo-ZnO hybrid films were prepared by functionalizing the ZnO macropore films with azo pigment (1,1'-(biphenyl-4,4'-diylbis(diazene-2,1-diyl))dinaphthalen-2-ol). Scanning electronic microscopy, current-voltage, UV-Vis absorption spectroscopy and Kelvin probe were used to characterize these films. The oxygen sensing characteristics of hybrid films and pure ZnO film were measured under the irradiation of UV light. The results show that the sensitivity of hybrid film is about 500 times higher than that of pure ZnO film. The high sensitivity to oxygen of hybrid films is mainly attributed to the increasing of the photo-generated electron concentration. Enhanced photo-induced charge separation after functionalization is confirmed by the pattern of transient photovoltage. Our results demonstrate that the functionalization with azo pigment is a promising approach to enhance the oxygen sensitivity of ZnO under the irradiation of UV light.
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Peng Liang,Tian-Tian Ren,Wei-Man Tian,Wen-Jia Xu,Gang-Hong Pan,Xian-Hong Yin 대한화학회 2014 Bulletin of the Korean Chemical Society Vol.35 No.1
Three new transition metal complexes based on Ozagrel [Cu(Ozagrel)]n (1), [Zn(Ozagrel)(Cl)]n (2), {[Mn2- (Ozagrel)(1,4-ndc)2]·(H2O)}n (3), (Ozagrel = 3-(4-((1H-imidazol-1-yl)methyl)phenyl)acrylic acid; 1,4-ndc = 1,4-Naphthalenedicarboxylic acid) have been hydrothermally synthesized and characterized by elemental analyse, IR, TG, PXRD, electrochemical analysis and single crystal X-ray diffraction. X-ray structure analysis reveals that 1 and 3 are 3D coordination polymers, while complex 2 is a two-dimensional network polymer, the 2D layers are further packed into 3D supramolecular architectures that are connected through hydrogen bonds. The electrochemistry of 1-3 was studied by cyclic voltammetry in methanol and water using a glassy carbon working electrode. Also, thermal decomposition process and powder X-ray diffraction of complexes were investigated.
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Low Carbon Scheduling with Iterative Ant Colony Algorithm
Peng Liang,WenSi Chen,MingQiang Luo,ShuQin Chen 보안공학연구지원센터 2016 International Journal of Smart Home Vol.10 No.5
This research considers a low carbon scheduling problem in unrelated parallel machines. To solve this problem, we first establish a low carbon scheduling mathematical model. Then an iterative ant optimization algorithm is presented. Furthermore, parameters of proposed iterative ant optimization algorithm are selected by Taguchi methods on generating test dataset. Finally, comparative experiments indicate the proposed iterative ant optimization algorithm has better performance on minimizing energy consumption as well as total tardiness.
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