Home / Journals / ICCES / Vol.13, No.4, 2009
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  • Open Access

    ABSTRACT

    Development of On-line Structural Condition Monitoring System in Korean Nuclear Power Plant

    Jin-Ho Park1, Joon-Hyun Lee2
    The International Conference on Computational & Experimental Engineering and Sciences, Vol.13, No.4, pp. 65-66, 2009, DOI:10.3970/icces.2009.013.065
    Abstract The on-line structural integrity monitoring systems and the related techniques have been developed in Korean nuclear power plant for the purpose of Condition Based Maintenance(CBM). There are four different kinds of systems such as IVMS(Internal Vibration Monitoring System), LPMS(Loose Part Monitoring System), ALMS(Acoustic Leak Monitoring System), and RCP-VMS(Reactor Coolant Pump Vibration Monitoring system). The purpose of the IVMS is to monitor and diagnose the axial preload of the core support barrel and the abnormality of the motion of the fuel bundles inside the reactor pressure vessel. The LPMS is being operated to detect and alarm the presence of loose parts… More >

  • Open Access

    ABSTRACT

    Arrangement of Monomer Injection in the Characteristics of Copolymer

    Mohsen Ghorbani1, Hossein Eisazadeh2
    The International Conference on Computational & Experimental Engineering and Sciences, Vol.13, No.4, pp. 67-68, 2009, DOI:10.3970/icces.2009.013.067
    Abstract Polypyrrole/Poly(vinyl acetate) (PPy/PVAc) copolymer was prepared by the copolymerization of vinyl acetate and pyrrole using FeCl3 and benzoylperoxide as an oxidant in the presence of various surfactants such as sodium dodecylbenzenesulfonate and poly (ethylene glycol) in the aqueous/non-aqueous media. The PPy/PVAc copolymer was characterized in terms of conductivity, morphology, chemical structure, particle size and yield. The results indicate that the morphology, particle size, yield and electrical conductivity of the products are dependent on the type of surfactant and the arrangement of monomer injection. The chemical structure of obtained product was determined by FTIR spectroscopy. By comparison FTIR spectra between pure… More >

  • Open Access

    ABSTRACT

    Experimental and Numerical Studies on the Wake behind Rotor Blade

    Hyun Ki1, Jongwook Choi2, Sungcho Kim2
    The International Conference on Computational & Experimental Engineering and Sciences, Vol.13, No.4, pp. 69-70, 2009, DOI:10.3970/icces.2009.013.069
    Abstract The wake behind rotor blade is investigated by numerical and experimental approaches. Flow structure measured through PIV is compared with numerical analysis using commercial program of ANSYS CFX adopting the RNG k-ε turbulence model. Blade model fabricated by Rapid-Prototype method has the cross section of NACA0012 airfoil and the pitch angle of 10°. The rectangular blade of which rotating diameter (D) and chord length are 0.12 m and 0.024 m respectively rotates at 240 rpm. Horizontal and vertical directions of the blade are selected as x and z coordinates, respectively, the origin locates at the rotating center, and measurement range… More >

  • Open Access

    ABSTRACT

    New Frontiers in Micro/Nano Electro-Mechanical-Energetics

    Luke Currano, Wayne Churaman, Ronald Polcawich, Jeff Pulskamp, Chris Morris, Eugene Zakar Madan Dubey1, Priya Vashishta2
    The International Conference on Computational & Experimental Engineering and Sciences, Vol.13, No.4, pp. 71-72, 2009, DOI:10.3970/icces.2009.013.071
    Abstract Micro/Nano Electro-Mechanical-Energetics science and technology have emerged over the last decade as a very critical and highly visible component of nearly all scientific and engineering disciplines. The presentation will focus on recent enabling Piezoelectric Nano/MEMS science and technologies for sensors and electronics. Most recent development in nanoenergetic devices and its integration with MEMS for several novel applications in mechanical, electrical, chemical and optical research will also be reviewed. Basic science in modeling, simulation and validation of Micro and Nano devices will also be presented for possible future generation of smart and intelligent devices/systems. More >

  • Open Access

    ABSTRACT

    Simulation of damage in textile composites: model development and experimental validation

    I. Verpoest1,2, S.V. Lomov1
    The International Conference on Computational & Experimental Engineering and Sciences, Vol.13, No.4, pp. 73-74, 2009, DOI:10.3970/icces.2009.013.073
    Abstract The paper will first introduce the general approach developed at the Katholieke Universiteit Leuven for modeling the internal structure of textiles and for prediction of the mechanical properties of textile based composites.
    Then, the results of experimental observations of damage processes during tensile quasi-static and fatigue loading for carbon/epoxy textile composites will be presented, more specifically for (1) woven fabrics; (2) non-crimp fabrics (NCF); (3) structurally stitched NCF. The test methodology includes, apart from the “normal” tensile testing, registration of acoustic emission and full-field measurements of strains on the surface of the sample. The damage in the samples loaded… More >

  • Open Access

    ABSTRACT

    Kinetics of Order-order transitions in block copolymers: Cylinders to spheres

    Rama Bansil1, Minghai Li1, Yongsheng Liu1
    The International Conference on Computational & Experimental Engineering and Sciences, Vol.13, No.4, pp. 75-76, 2009, DOI:10.3970/icces.2009.013.075
    Abstract Block copolymers are known to form micelles of different shapes in selective solvents that preferentially dissolve one of the constituent blocks. These micellar fluids exhibit various ordered and disordered phases. To gain microscopic insight into the mechanisms involved in the transformation between different phases we use synchrotron-based time-resolved small angle x-ray scattering (SAXS) and coarse-grained discrete Brownian Dynamics simulations. In this talk I will focus on the kinetics of the transformation from the hexagonal packed cylinder (HEX) phase to cubic phases (FCC or BCC). SAXS data was interpreted with a geometrical model for the transformation from cylinders to spheres. Brownian… More >

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