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    Accuracy and Convergence Using a Local Interaction Simulation Approach in One, Two, and Three Dimensions

    Source: Journal of Applied Mechanics:;2009:;volume( 076 ):;issue: 003::page 31008
    Author:
    Shankar Sundararaman
    ,
    Douglas E. Adams
    DOI: 10.1115/1.2871105
    Publisher: The American Society of Mechanical Engineers (ASME)
    Abstract: Guided waves are utilized in structural health monitoring for identifying damage in material components. Simulations can be used to examine how elastic waves propagate in components to help in selecting measurement and data analysis techniques. In this work, the influence of grid size and the frequency sample rate on the amplitude accuracy and convergence of local interaction simulation approach/sharp interface model (LISA/SIM) numerical simulations are studied as they pertain to guided wave propagation in structural materials. These issues are studied in all three dimensions, and amplitude distortion with respect to the Courant–Friedrich–Lewy criterion is explored. The LISA/SIM enables accurate and fast modeling of localized and sharp changes in material properties across interfaces associated with heterogeneities and/ or boundaries. The validity of the simulation is demonstrated by comparing simulated responses with experimentally measured data. Additionally, Lamb wave dispersion curves are extracted through the course of the convergence study using a broadband pulse and the two-dimensional fast Fourier transform method.
    keyword(s): Dimensions , Waves , Signals , Sampling (Acoustical engineering) , Computer simulation , Simulation , Wave propagation AND Modeling ,
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      Accuracy and Convergence Using a Local Interaction Simulation Approach in One, Two, and Three Dimensions

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    http://yetl.yabesh.ir/yetl1/handle/yetl/139744
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    contributor authorShankar Sundararaman
    contributor authorDouglas E. Adams
    date accessioned2017-05-09T00:31:16Z
    date available2017-05-09T00:31:16Z
    date copyrightMay, 2009
    date issued2009
    identifier issn0021-8936
    identifier otherJAMCAV-26748#031008_1.pdf
    identifier urihttp://yetl.yabesh.ir/yetl/handle/yetl/139744
    description abstractGuided waves are utilized in structural health monitoring for identifying damage in material components. Simulations can be used to examine how elastic waves propagate in components to help in selecting measurement and data analysis techniques. In this work, the influence of grid size and the frequency sample rate on the amplitude accuracy and convergence of local interaction simulation approach/sharp interface model (LISA/SIM) numerical simulations are studied as they pertain to guided wave propagation in structural materials. These issues are studied in all three dimensions, and amplitude distortion with respect to the Courant–Friedrich–Lewy criterion is explored. The LISA/SIM enables accurate and fast modeling of localized and sharp changes in material properties across interfaces associated with heterogeneities and/ or boundaries. The validity of the simulation is demonstrated by comparing simulated responses with experimentally measured data. Additionally, Lamb wave dispersion curves are extracted through the course of the convergence study using a broadband pulse and the two-dimensional fast Fourier transform method.
    publisherThe American Society of Mechanical Engineers (ASME)
    titleAccuracy and Convergence Using a Local Interaction Simulation Approach in One, Two, and Three Dimensions
    typeJournal Paper
    journal volume76
    journal issue3
    journal titleJournal of Applied Mechanics
    identifier doi10.1115/1.2871105
    journal fristpage31008
    identifier eissn1528-9036
    keywordsDimensions
    keywordsWaves
    keywordsSignals
    keywordsSampling (Acoustical engineering)
    keywordsComputer simulation
    keywordsSimulation
    keywordsWave propagation AND Modeling
    treeJournal of Applied Mechanics:;2009:;volume( 076 ):;issue: 003
    contenttypeFulltext
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