Shadow-Moiré and the use of flexible gratings to adapt to curved surfaces

  1. J. C. Martínez Antón 1
  2. H. Canabal 1
  3. J.A. Quiroga 1
  4. E. Bernabeu 1
  5. M. García Labajo 2
  6. V. Cortés Testillano 2
  1. 1 Universidad Complutense de Madrid
    info

    Universidad Complutense de Madrid

    Madrid, España

    ROR 02p0gd045

  2. 2 Subdirección de Investigación y Desarrollo de Tecnología y MaterialesDirección de Proyectos y SistemasConstrucciones Aeronáuticas
Konferenzberichte:
15th World Conference on Nondestructive Testing. Roma (Italy)

Verlag: Italian Society for Non-Destructive Testing

Datum der Publikation: 2000

Kongress: 15th World Conference on Non-Destructive Testing

Art: Konferenz-Beitrag

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Zusammenfassung

We have extended the use of the well know shadow moire technique to be implemented in curved surfaces (particularly convex cylindrical and conical). The prototype is based on a tripod support spring loaded. A polyester foil with a printed Ronchi grating is stretched between three points. This allows the definition of a perfect plane surface and further the elastic load permits to adapt the foil to any cylindrical or conical surface, no matter the relative orientation of the support to the surface and with an optimum distribution of tensile stress. Some experimental results have been obtained which are quite satisfactory in comparison with the flat grating approach. This work is under the INDUCE European project.