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Content archived on 2024-06-11

Advanced integrated ndt concepts for unified life-cycle


In the aeronautical industry, the tireless adaptation of increasing quality lev els to the imperatives of cost and cycles reduction can be facilitated, among o thcr means, by the adoption of unified life-cycle concepts that merge aspects o f concurrent enginecring and total quality management around the design. The ac tualisation of these concepts makes mandatory the integration of NonDestructive Testing (NDT) at various phases of a component life. The late developments in the NDT field, including some BE, have been to some extent focused on this subj ect. Nevertheless, to face the unified life-cycle in all respects, it becomes n ecessary to put a greater effort on the integration of the nondestructive techn iques at the level of design and manufacturing process. The INDUCE project has bcen conceived to make this objective feasible. In fact it's centred on: The modelling of the items involved in the nondestructive inspections (materials, dcfects, structure excitation, equipment's responses) and of their mutual inter actions. This with the aim to: provide powerful tools allowing the designers to get infonnation about the inspectability problems; make available a detectabil ity analysis tool supporting the devising of the inspection procedurcs with det ectability analysis, thus contributing to the cost and reliability optimisation of the inspections; exploit the NDT technologies, sustaining their application as materials and defects characterisation methods. The development of advanc ed nondestructive teclmiques and analysis methodologies for measuring mechanica l, electromagnetic and thermophysical quantities, with the aim to strictly link the inspection methods with the material properties and defect typology, as we ll as with the structures characteristics. The development of tools for the l ogical and functional integration of the previous approaches in tenms of liaiso n among different techniques. This will make available a more comprehensive and user friendly diagnosis tool on one side and will allow a complete integration of the NDT modelling with the CAD system. The modelling of the inspectability and detectability problems are the programme pivot: they involve all the aspect s of the NDT techniques, specially with reference to the forecast of real NDT equipments responses to modelled dcfects in CAD-dcfined parts. The involved ND T techniques are: Ultrasound, Neutron Radiography, Thermography, Moir‚ Interfer ometry, Automated Visual Inspection (Shape from Shading), Eddy Cunrent. The dev elopment of the models will be supported by an extensive experimentation that w ill be ananged so to take into account some of the most critical diagnosis prob lems from the inspectability and/or cost viewpoint, such as: porosity percentag e measurements and discrimination between resin rich areas and voids in composi te structures; corrosion detection, sizing and discrimination in metallic struc tures; residual stress measurements; repair intervention drive and structural r eliability characterisation. In particular, a comparison between results obtain ed from NDT techniques and destructive testing will be perfonmed. This will all ow a complete validation trial through two levels: (i) model validation by NDT; (ii) NDT validation by destructive testing. A specific effort will be devoted to realise the integration of the developed methodologies and models in terms o f CAD link and multi-teclmiques inspections. This will be carried in parallel w ith an active participation at CEN level in collaboration with the Energy domai n and provide soflware products w ith grcat possibilities of dissemination. The programme areas are: 3A.5.16 3A. 1.4 3A.1.5 3A.2.3. The main expected after math of the program are: Improvement of the concurrent Engineering approach wi th the availability of a more powerful model-driven NDT technique new tools for aircraft maintenance based on the possibility to compare production and inserv ice inspection data . POD (Probability of Detection) evaluation on more specifi c structures at lower costs, by mixing real and virtual data

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Alenia Aerospazio - Un'Azienda Finmeccanica SpA
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Viale dell'Aeronautica
80038 Pomigliano d'Arco - Napoli

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Participants (15)