Journals / CMC / Vol.31, No.2
Table of Content


    Waste Tire Rubberized Concrete Plates for Airport Pavements: Stress and Strain Profiles in Time and Space Domains

    E. Ferretti1
    CMC-Computers, Materials & Continua, Vol.31, No.2, pp. 87-112, 2012, DOI:10.3970/cmc.2012.031.087
    Abstract The present study follows a previous study on the stress and strain profiles along the cross-section of waste tire rubberized concrete plates for airport pavements, subjected to quasi-static loads [Ferretti and Bignozzi (2012)]. Further results on the in-situ performance of concrete plain and rubberized taxiways have been collected and presented here. The experimental program has been undertaken at the Guglielmo Marconi airport of Bologna (Italy). It concerns two portions of the taxiway, one built with plain concrete and one with rubberized concrete. Each portion has been fitted with strain gauges embedded in concrete for the acquisition of vertical strains. More >


    A New Iterative Regularization Method for Solving the Dynamic Load Identification Problem

    Linjun Wang1,2, Xu Han3, Youxiang Xie4
    CMC-Computers, Materials & Continua, Vol.31, No.2, pp. 113-126, 2012, DOI:10.3970/cmc.2012.031.113
    Abstract In this paper, a new iterative regularization method (ITR) is presented to solve the reconstruction of multi-source dynamic loads acting on the structure of simple supported plate. Based on a quadratical convergence method, this method is used to compute the the approximate inverse of square matrix. The theoretical proofs and numerical test show that the proposed method is very effective. Finally, the present method is applied to the identification of the multi-source dynamic loads on a surface of simply supported plate. Numerical simulations of two examples demonstrate the effectiveness and robustness of the present method. More >


    On the Compression Viewed as a Geometric Transformation

    Ligia Munteanu1, Cornel Brisan2, Veturia Chiroiu3, Stefania Donescu4
    CMC-Computers, Materials & Continua, Vol.31, No.2, pp. 127-146, 2012, DOI:10.3970/cmc.2012.031.127
    Abstract A modeling of the compression by using the property of Helmholtz equation to be invariant under geometric transformations is presented in this paper. The versatility of the geometric transformations is illustrated in order to obtain a new interpretation of the compression process. The physical spatial compression leads, most of the times, to new materials with inhomogeneous and anisotropic properties. The compression can be theoretically controlled by the geometric transformations. As an example, new architectures for auxetic materials can be built up by applying the geometric transformations. The new versions are finding their full correspondents in the results of the experiments… More >


    Modal Characteristics of Five-Layered Slab Waveguides with Double-Clad Metamaterials

    Cherl-Hee Lee1, Jonghun Lee1
    CMC-Computers, Materials & Continua, Vol.31, No.2, pp. 147-156, 2012, DOI:10.3970/cmc.2012.031.147
    Abstract The guided modes are investigated in a five-layered slab waveguide with double claddings of metamaterials using a new graphical method. The dispersion equations in the symmetric and asymmetric five-layered slab waveguide are derived from the presented graphical method, and corresponding field distributions are plotted for the oscillating guided and surface guided modes. The energy flux distribution along the axis is plotted for the surface TE1 mode. More >

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