A robust procedure for damage identification in a lattice spacecraft structural element by mean of Strain field pattern recognition techniques

J. Sierra, M. Frövel, E. Del Olmo, J. M. Pintado, A. Güemes

Resultado de la investigación: Capítulo del libro/informe/acta de congresoContribución a la conferenciarevisión exhaustiva

2 Citas (Scopus)

Resumen

A high stiffness and low weight lattice structure for launcher applications made with high modulus carbon fiber was manufactured by EADS CASA Space by using a new cost efficient fiber placement technology. The structure consisted of a composite lattice of intertwined, unidirectional carbon fiber bars. Several Fiber Bragg Gratings (FBGs) were bonded along these bars in order to measure strain during different tests performed on the structure. A robust procedure for defect detection based on Principal Component Analysis (PCA) and strain field pattern recognition techniques was used in order to identify different defects induced in the structure during static testing conducted until fracture. A test campaign of smaller, iso-grid structures was conducted with the aim of studying the sensitivity to detect small defects in the lattice structure. A PCA model was built for the healthy structure. Subsequently, different known damage conditions were projected into the PCA model (baseline). From this projection, various damage indices and detection thresholds were calculated. The results showed that even small damages located far away from the sensors could be detected by this technique.

Idioma originalInglés
Título de la publicación alojada16th European Conference on Composite Materials, ECCM 2014
EditorialEuropean Conference on Composite Materials, ECCM
ISBN (versión digital)9780000000002
EstadoPublicada - 2014
Publicado de forma externa
Evento16th European Conference on Composite Materials, ECCM 2014 - Seville, Espana
Duración: 22 jun. 201426 jun. 2014

Serie de la publicación

Nombre16th European Conference on Composite Materials, ECCM 2014

Conferencia

Conferencia16th European Conference on Composite Materials, ECCM 2014
País/TerritorioEspana
CiudadSeville
Período22/06/1426/06/14

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