Aramid Fiber

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P Paramasivam - One of the best experts on this subject based on the ideXlab platform.

  • behavior of Aramid Fiber reinforced polymer reinforced high strength concrete beams under bending
    Journal of Composites for Construction, 2005
    Co-Authors: M A Rashid, M A Mansur, P Paramasivam
    Abstract:

    Flexural test results of ten high strength concrete beams reinforced with Aramid Fiber-reinforced polymer (AFRP) bars together with a steel-reinforced beam that served as a reference are presented and discussed. All beams were tested under third-point loading. Test results have shown that a concrete beam, when reinforced with AFRP bars, becomes more flexible in the postcracking range than an equivalent steel-reinforced beam, demonstrates wider and predominantly vertical cracks even in the shear span, and may fail in an unusual flexure-shear mode. Major critical issues concerning flexural designs of AFRP-reinforced beams have been discussed in the perspective of code provisions, and suitable recommendations are made for practical design. A method has been suggested to provide a meaningful quantification of ductility for FRP-reinforced beams. Also the need for reducing the maximum spacing of stirrups from that specified in the current code provisions for sections subjected to large shear combined with significant bending moment has been identified and recommendations are made.

Zhi Sun - One of the best experts on this subject based on the ideXlab platform.

  • carbon Fiber aluminum foam sandwich with short Aramid Fiber interfacial toughening
    Composites Part A-applied Science and Manufacturing, 2012
    Co-Authors: Zhi Sun, J Jeyaraman, Shiyong Sun, Haoran Chen
    Abstract:

    Abstract Interfacial toughness and toughening mechanisms of a sandwich beam, consisting of an aluminum foam covered with two carbon-Fiber/epoxy composite surface layers, are investigated in this study. To improve the interfacial toughness of the sandwich beam, short Aramid Fiber of different lengths and densities were inserted at the interface during the sandwich fabrication process. The interfacial toughness between face-sheet and core was then measured through the Double Cantilever Beam test for various sandwich designs. Improvements of varying degrees in the interfacial toughness were observed for all specimens toughened with short Aramid Fibers of different lengths. The interfacial toughening performance and underlying mechanisms for energy absorption were discussed and analyzed using scanning electron microscopy.

Haoran Chen - One of the best experts on this subject based on the ideXlab platform.

  • carbon Fiber aluminum foam sandwich with short Aramid Fiber interfacial toughening
    Composites Part A-applied Science and Manufacturing, 2012
    Co-Authors: Zhi Sun, J Jeyaraman, Shiyong Sun, Haoran Chen
    Abstract:

    Abstract Interfacial toughness and toughening mechanisms of a sandwich beam, consisting of an aluminum foam covered with two carbon-Fiber/epoxy composite surface layers, are investigated in this study. To improve the interfacial toughness of the sandwich beam, short Aramid Fiber of different lengths and densities were inserted at the interface during the sandwich fabrication process. The interfacial toughness between face-sheet and core was then measured through the Double Cantilever Beam test for various sandwich designs. Improvements of varying degrees in the interfacial toughness were observed for all specimens toughened with short Aramid Fibers of different lengths. The interfacial toughening performance and underlying mechanisms for energy absorption were discussed and analyzed using scanning electron microscopy.

M A Rashid - One of the best experts on this subject based on the ideXlab platform.

  • behavior of Aramid Fiber reinforced polymer reinforced high strength concrete beams under bending
    Journal of Composites for Construction, 2005
    Co-Authors: M A Rashid, M A Mansur, P Paramasivam
    Abstract:

    Flexural test results of ten high strength concrete beams reinforced with Aramid Fiber-reinforced polymer (AFRP) bars together with a steel-reinforced beam that served as a reference are presented and discussed. All beams were tested under third-point loading. Test results have shown that a concrete beam, when reinforced with AFRP bars, becomes more flexible in the postcracking range than an equivalent steel-reinforced beam, demonstrates wider and predominantly vertical cracks even in the shear span, and may fail in an unusual flexure-shear mode. Major critical issues concerning flexural designs of AFRP-reinforced beams have been discussed in the perspective of code provisions, and suitable recommendations are made for practical design. A method has been suggested to provide a meaningful quantification of ductility for FRP-reinforced beams. Also the need for reducing the maximum spacing of stirrups from that specified in the current code provisions for sections subjected to large shear combined with significant bending moment has been identified and recommendations are made.

Chuanmei Jiao - One of the best experts on this subject based on the ideXlab platform.

  • fire safety improvement of para Aramid Fiber in thermoplastic polyurethane elastomer
    Journal of Hazardous Materials, 2017
    Co-Authors: Xilei Chen, Wenduo Wang, Chuanmei Jiao
    Abstract:

    Abstract This article mainly studied fire safety effects of para-Aramid Fiber (AF) in thermoplastic polyurethane (TPU). The TPU/AF composites were prepared by molten blending method, and then the fire safety effects of all TPU composites were tested using cone calorimeter test (CCT), microscale combustion colorimeter test (MCC), smoke density test (SDT), and thermogravimetric/fourier transform infrared spectroscopy (TG-IR). The CCT test showed that AF could improve the fire safety of TPU. Remarkably, the peak value of heat release rate (pHRR) and the peak value of smoke production rate (pSPR) for the sample with 1.0 wt% content of AF were decreased by 52.0% and 40.5% compared with pure TPU, respectively. The MCC test showed that the HRR value of AF-2 decreased by 27.6% compared with pure TPU. TG test showed that AF promoted the char formation in the degradation process of TPU; as a result the residual carbon was increased. The TG-IR test revealed that AF had increased the thermal stability of TPU at the beginning and reduced the release of CO2 with the decomposition going on. Through the analysis of the results of this experiment, it will make a great influence on the study of the para-Aramid Fiber in the aspect of fire safety of polymer.