Symbolic dynamic analysis of surface deformation during fatigue crack initiation

Dheeraj Sharan Singh, Shalabh Gupta, Asok Ray

    Research output: Contribution to journalArticle

    8 Citations (Scopus)

    Abstract

    This rapid communication addresses early detection of fatigue damage evolution in polycrystalline alloys, based on the observation of surface deformation (e.g. roughness, linings and incisions). This method is well suited for calibration of other model-based and experimental tools for damage analysis and prediction in the fatigue crack initiation phase. To this end, the existing theory of symbolic dynamics-based feature extraction from time-series data is extended to the analysis of two-dimensional surface images. The resulting algorithms are experimentally validated on a fatigue-testing machine and a surface interferometer in the laboratory environment. The experiments have been conducted for analysis of statistical changes in the surface profiles due to gradual evolution of deformation in specimens, made of the 2024-T6 aluminum alloy.

    Original languageEnglish (US)
    Article number043003
    JournalMeasurement Science and Technology
    Volume21
    Issue number4
    DOIs
    StatePublished - Jan 1 2010

    Fingerprint

    Symbolic Analysis
    Fatigue Crack
    Crack Initiation
    Symbolic Dynamics
    crack initiation
    Crack initiation
    Dynamic Analysis
    Dynamic analysis
    fatigue testing machines
    Fatigue Damage
    Surface Profile
    Aluminum Alloy
    Time Series Data
    damage
    Interferometer
    Roughness
    Fatigue
    Feature Extraction
    Fatigue testing
    Fatigue damage

    All Science Journal Classification (ASJC) codes

    • Instrumentation
    • Engineering (miscellaneous)
    • Applied Mathematics

    Cite this

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    abstract = "This rapid communication addresses early detection of fatigue damage evolution in polycrystalline alloys, based on the observation of surface deformation (e.g. roughness, linings and incisions). This method is well suited for calibration of other model-based and experimental tools for damage analysis and prediction in the fatigue crack initiation phase. To this end, the existing theory of symbolic dynamics-based feature extraction from time-series data is extended to the analysis of two-dimensional surface images. The resulting algorithms are experimentally validated on a fatigue-testing machine and a surface interferometer in the laboratory environment. The experiments have been conducted for analysis of statistical changes in the surface profiles due to gradual evolution of deformation in specimens, made of the 2024-T6 aluminum alloy.",
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    Symbolic dynamic analysis of surface deformation during fatigue crack initiation. / Singh, Dheeraj Sharan; Gupta, Shalabh; Ray, Asok.

    In: Measurement Science and Technology, Vol. 21, No. 4, 043003, 01.01.2010.

    Research output: Contribution to journalArticle

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