Home / Journals / ICCES / Vol.12, No.3, 2009
Table of Content
  • Open Access

    ABSTRACT

    Stay cable vehicle live load effects analysis based on structural health monitoring data

    C.M. Lan1, H. Li1
    The International Conference on Computational & Experimental Engineering and Sciences, Vol.12, No.3, pp. 75-82, 2009, DOI:10.3970/icces.2009.012.075
    Abstract Stay cables are some of the most critical structural components of a bridge. However, stay cables readily suffer from corrosion damage and stress corrosion damage. Thus, health monitoring of stay cables is important for ensuring the integrity and safety of a bridge. Glass Fibre Reinforced Polymer Optical Fibre Bragg Grating (GFRP-OFBG) cable, a kind of fibre Bragg grating optical sensing technology-based smart stay cables, is proposed in this study. The fabrication procedure of the smart stay cable was developed and the self-sensing property of the smart stay cable was calibrated. The application of the smart stay cables on the Tianjin… More >

  • Open Access

    ABSTRACT

    A path iterative method for laser-controlled crack propagation and its convergence

    Weiming Tao1, Xingwang Yang1
    The International Conference on Computational & Experimental Engineering and Sciences, Vol.12, No.3, pp. 83-84, 2009, DOI:10.3970/icces.2009.012.083
    Abstract Laser controlled separation of brittle materials like glass is a promising non-conven\discretionary {-}{}{}tional cutting method. It is an application of the crack propagation driven by thermal stresses induced by laser irradiation. In order to induce and control a crack propagating accurately along predetermined asymmetric trajectory in a brittle plate, an iterative method for effective laser scanning path was presented, and the effect of control parameters on the convergence was investigated. The iterative formulation for laser scanning path was based on PID control theory, which was composed of deviation of the crack from predetermined trajectory and its integral and differential. To… More >

  • Open Access

    ABSTRACT

    Buckling driven delamination in uniaxially compressed composite panels

    Christina Völlmecke1, M. Ahmer Wadee2
    The International Conference on Computational & Experimental Engineering and Sciences, Vol.12, No.3, pp. 85-86, 2009, DOI:10.3970/icces.2009.012.085
    Abstract A geometrically nonlinear plate model has been developed analytically in order to investigate the buckling behaviour of laminated composite panels containing a centrally located delaminated patch. The panels examined are rectangular and under uniaxial compression. Trigonometric out-of-plane displacement functions are employed in the Rayleigh--Ritz procedure where minimum energy principles are applied to solve for the mechanical behaviour of the plates. The in-plane deformations are determined via von K\'arm\'an's compatibility equation by applying restrained edges at the boundary of the delaminated region. Different delamination configurations are investigated with the critical buckling loads and eigenvectors being determined using linear analysis and the… More >

  • Open Access

    ABSTRACT

    The winding road from QNDE to SHM and beyond

    Jan D. Achenbach1
    The International Conference on Computational & Experimental Engineering and Sciences, Vol.12, No.3, pp. 87-88, 2009, DOI:10.3970/icces.2009.012.087
    Abstract A significant limitation of NDE became apparent in the sixties with the advent of fracture mechanics as a major consideration for the determination of structural safety. Fracture mechanics requires quantitative information that has to be obtained from non-destructive testing procedures. The 1970's mark the start of research and development to achieve quantitative capability, and adding the Q to NDE. Since that time significant advances have been made of the methods of quantitative non-destructive evaluation that are the basis of the diagnostics part of structural health management, including sensor development, new techniques such as laser-based ultrasonics, acoustic and x-ray imaging, thermal… More >

  • Open Access

    ABSTRACT

    On the stability of the upper airways system

    A.K Lazopoulos1, K.A. Lazopoulos1, G. Palassopoulos2
    The International Conference on Computational & Experimental Engineering and Sciences, Vol.12, No.3, pp. 89-91, 2009, DOI:10.3970/icces.2009.012.089
    Abstract Simple models for the upper faryngeal obstruction, describing the sleep apnea syndrome are proposed. Stability is discussed, of two and three individualized elements, with and without elastic connections, interacting with the steady flow. Considering the flow as the controlling parameter, critical steady state flows are located and their post-critical behavior is discussed for various models. It is pointed out that the non-linear constitutive elastic laws are necessary contrary to the linear ones introduced by Fodil [1998]. Finally the three element model will be presented and studied with non-linear constitutive relations and side connections. Applications of the theory will be performed… More >

  • Open Access

    ABSTRACT

    Measuring displacement of a bridge using multi-channel image processing techniques

    Jong-Jae Lee, Jong-Woong Park, Young-Soo Park, Hyung-Jo Jung
    The International Conference on Computational & Experimental Engineering and Sciences, Vol.12, No.3, pp. 92-92, 2009, DOI:10.3970/icces.2009.012.092
    Abstract Measuring the displacement of a flexible bridge is difficult particularly on a long span bridge. In this study, real-time displacement measurement of a long span bridge was carried out using digital image processing techniques which require a target recognition algorithm, projection of the captured image, and calculation of the actual displacement using target geometry and the number of pixels moved. To measure the displacement of a bridge from a distant location which can be regarded as a fixed reference point, a novel image processing method has been devised. By measuring the same target with two independent cameras placed in a… More >

  • Open Access

    ABSTRACT

    Dynamic analysis of asymmetrically laminated composite frames

    Fuxing Miao1, Guojun Sun1
    The International Conference on Computational & Experimental Engineering and Sciences, Vol.12, No.3, pp. 93-94, 2009, DOI:10.3970/icces.2009.012.093
    Abstract Based on elastic wave theory, Pao[1] and his colleagues recently proposed a novel frequency domain matrix method, i.e. the Method of Reverberation-Ray Matrix (MRRM) for solving the transient response of truss-type structures. The theory has been shown accurately coincided with experimental data of a model truss for the early responses.
    Fiber reinforced laminated composites have advantages such as high specific strength, high specific stiffness, corrosion resistance etc.. The dynamic as well as the static behavior of laminated composites is largely dependent upon fiber orientation and ply-stacking sequence. Due to inhomogeneity and anisotropy of the material, these structures are vulnerableto highly… More >

  • Open Access

    ABSTRACT

    Post-traumatic recovery mechanism on the ankle articulation

    Asist. Univ. Drd. Abalasei Catalin1
    The International Conference on Computational & Experimental Engineering and Sciences, Vol.12, No.3, pp. 95-102, 2009, DOI:10.3970/icces.2009.012.095
    Abstract The mechanism which is going to be made following the technical data presented in this work, represents a major step in the post-traumatic rehabilitation on the ankle articulation. The machine's support is a metallic confection of welded rectangular pipe, metallic profiles and sheet, which assures the appliance of the component parts and contains the sitting basis of the mechanism on the floor. The plaque is the element which directly sustains the person using the mechanism, and which has an oscillating movement in a vertical plane on the circumference. The plaque is turning-proof around the vertical axis of the 1st axel,… More >

  • Open Access

    ABSTRACT

    On the solution of a coefficient inverse problem for the non-stationary kinetic equation

    Mustafa Yildiz1
    The International Conference on Computational & Experimental Engineering and Sciences, Vol.12, No.3, pp. 103-110, 2009, DOI:10.3970/icces.2009.012.103
    Abstract The solvability conditions of an inverse problem for the non-stationary kinetic equation is formulated and a new numerical method is developed to obtain the approximate solution of the problem. A comparison between the approximate solution and the exact solution of the problem is presented. More >

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