Optimization of Geo-positioning of NDT measurements for Modeling spatial field of defects: a two stage procedure

Trung-Viet Tran (1) , Franck Schoefs (1) , Emilio Bastidas-Arteaga (1) , Géraldine Villain (2) , Xavier Derobert (2)

1 GeM - Institut de Recherche en Génie Civil et Mécanique
2 IFSTTAR/COSYS/MACSI - Matériaux, Assemblages, composites, Structures Instrumentées

The localization of weak properties or bad behavior of a structure is still a very challenging task that concentrates the improvement of Non Destructive Testing (NDT) tools on more efficiency and higher structural coverage. In case of random loading or material properties, this challenge is arduous because of the limited number of measures and the quasi-infinite potential positions of local failures. The paper shows that the stationary property is useful to find the minimum quantity of NDT measurements and their position for a given quality assessment. It is shown that a two stages procedure allows us (i) to quantify the properties of the ergodic, stationary field (ii) to assess the distribution of the characteristics. The optimization is reached following a criterion based on confidence intervals of the statistics.

Mots clés: probability of interval; spatial variability; Karhunen-Loève; optimization of inspection; Confidence interval

Domaines: Mécanique [physics.med-ph]; Matériaux

Trung-Viet Tran, Franck Schoefs, Emilio Bastidas-Arteaga, Géraldine Villain, Xavier Derobert. Optimization of Geo-positioning of NDT measurements for Modeling spatial field of defects: a two stage procedure. ICOSSAR'11, 2013, New York, United States. ⟨hal-02055033⟩