Based on the philosophy of utilising the information available in the component CAD model to aid non-destructive testing (NDT), the authors extend the special software, that has been previously developed to map a 2D NDT image to its 3D CAD model surface for defect interpretation in 3D, to include two additional features, namely, structure decomposition for defect visualisation and reverse engineering for defect modelling. For the former, the structural and material information available in the CAD data are utilised to divide the NDT image mapped on the 3D CAD model into several viewing layers having the same material structure, thereby enabling defect analysis to be carried out on component sub-structure in a hierarchical manner. For the latter, defects identified by inspectors are segmented and modelled by automatic 3D geometric shape fitting, thereby enabling amendment of the original CAD model to include defects. Furthermore, a set of standard tools is provided in the new software for 3D measurement of defect location and size, such as co-ordinate values of the cursor, distance measure along the surface, and calculation of the surface area highlighted by users. Using practical ultrasonic image acquired from a real aircraft component as examples, the new features of the software are demonstrated in the paper to show its usefulness.


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    Titel :

    CAD based structure decomposition and reverse engineering for visualisation and modelling of defects


    Weitere Titelangaben:

    CAD basierte Gefügezerlegung und Reverse-Engineering zur Abbildung und Modellierung von Fehlern


    Beteiligte:
    Deng, W. (Autor:in) / Shark, L.K. (Autor:in) / Smith, J.P. (Autor:in) / Cavaccini, G. (Autor:in)


    Erscheinungsdatum :

    2004


    Format / Umfang :

    6 Seiten, 5 Bilder, 4 Quellen


    Anmerkungen:

    (nicht paginiert)


    Medientyp :

    Aufsatz (Konferenz)


    Format :

    Datenträger


    Sprache :

    Englisch





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