Papers by Keyword: Carbon-Cloth

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Authors: Hai Qing Liu, Jing Yuan, Shao Ying Hou, Yang Xue
Abstract: Application of carbon fiber material to reinforced concrete structure is a systems engineering involving materials, design and application, which is also an applied science involving numerous subjects. Carbon cloth is used to reinforce structures in many projects, but the study on strengthening frame joints is still little. Especially the study on aseismatic performance of frame structure side joints is much less. In this paper, the author established constitutive relation of RC frame side joints strengthened with carbon cloth and made a numerical simulation analysis of four side joints of beam column plate under low-cycle repeated load with ANSYS, a software based on finite element analysis. The author analyzed the failure mode and the mechanism under stress, found out the characteristics of hysteretic curve of such kind of joints, acquired ductility coefficient and equivalent viscous damping ratio coefficient and studied the structure ductility and seismic-energy-dissipating capacity. It was shown that failure mode transited from shear brittle failure of core space to ductile failure of plastic hinge of beam end, joints’ seismic-energy-dissipating capacity and ductility were improved observably, joints’ displacement between layers was reduced, and rigidity and aseismatic capacity of component were improved after the joints’ being reinforced with carbon cloth. And aseismatic performance of structure was superior obviously.
Authors: Cai Liu Yin, Guo Fu Wen, Qi Zhong Huang, Ping Zhou, Liang Ming He, Jiang Lie Liang, Bao Rong Liu
Abstract: Carbon nanolines on carbon cloth were prepared via a two-step method at 600-900°C for 30 min in a horizontal chemical vapor deposition (CVD) furnace, with Ni nano-particles as catalyst and ethylene as carbon source. XRD and SEM were used to examine the as-synthesized products. The result indicates that the pyrolysis temperature of 900°C is the most suitable to produce the carbon nanolines. The dimension and length of carbon nanolines are about 20nm and are well distributed, respectively. The as-synthesized carbon nanolines/carbon cloth is convenient and low-cost for adsorption materials of wastewater treatment, reinforcement of carbon/carbon composites. The growth mechanism of the as-synthesized carbon nanolines is simplely discussed.
Authors: Paola Gallo Stampino, Giovanni Dotelli, Luca Omati, Paolo Fracas, D. Brivio, P. Grassini
Abstract: A Gas Diffusion Layer (GDL) is a sandwiched conductive and porous material interposed between the catalyst layer and the bipolar plates in a Proton Exchange Membrane Fuel Cell (PEMFC) . This electrode substrate is a multi-functional material with several properties. All these requirements are best met by carbon fibres based materials, woven carbon or paper. In this work, the attention is focused on a new family of GDL which are produced by an Italian company, SAATIgroup. In particular a new class of carbon cloth with different surface treatments have been considered: a sample without surface treatment, a samples with a plasma treatments and a sample coated with PTFE. All these GDLs were coated with a microporous layer (MPL) to optimize the water management and the ultimate electrochemical performance of a PEM. The morphological and electrical characterization of all the samples was carried out by means of different techniques. Moreover, as the aim of this work was to study the effects of gas and water transportation on cell performance by applying MPLs, fuel cell tests have been conducted to relate their characteristics to the polarization curves.
Authors: Peng Wang, Jin Chen, Yi Bin Peng
Abstract: The paper completely analysed the cause of bridge defect with the project profile of the Queshi bridge. And relation to different defect , the paper gave the reinforcing design and the main maintenance using the construction features.
Authors: B. Kaludjerović, M. Trtica, Milesa Srećković, B. Babić, S. Zec, Ž. Bogdanov
Authors: T. Vasiljević, M. Baćić, M. Laušević, A. Onjia
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