Multi-instrumentation monitoring for the curing process of a composite structure

Francis Collombet (1) , Mauricio Torres (1, 2) , Bernard Douchin (1) , Laurent Crouzeix (1) , Yves-Henri Grunevald (3) , Jérôme Lubin (4) , Thierry Camps (5) , Xavier Jacob (6) , Geert Luyckx (7) , K.-T Wu (8)

1 ICA - Institut Clément Ader
2 CONACYT – CIDESI - National Center for Aeronautics Technologies
3 Composites Expertise & Solutions - CES (Castanet-Tolosan, France)
4 LAAS - Laboratoire d'analyse et d'architecture des systèmes
5 LAAS-MICA - Équipe MICrosystèmes d'Analyse
6 UT3 - Université Toulouse III - Paul Sabatier
7 UGENT - Universiteit Gent = Ghent University
8 Industrial Materials Institute (NRCC)

The phenomena occurring during curing process is one of the major issues to deal in order to improve the physical properties of a composite structure. In this work, a multi-instrumentation setup is conceived in order to have a better understanding of composites curing using different devices (tunnelling junction sensors, optical fibres and flexible ultrasonic transducers). The sensors are simultaneously embedded or placed on the surface of a thick carbon-epoxy plate for monitoring its autoclave cycle. By means of all signals, an evolution of temperature, internal strains and physical state changes is described. A qualitative statement from all measurements is provided to have a first approach of the initial state of the composite plate. With this methodology, the initial state after composite manufacturing can be considered in the structure design procedure to improve its mechanical performance.

Domaines: Génie des procédés

Francis Collombet, Mauricio Torres, Bernard Douchin, Laurent Crouzeix, Yves-Henri Grunevald, et al.. Multi-instrumentation monitoring for the curing process of a composite structure. Measurement - Journal of the International Measurement Confederation (IMEKO), 2020, 157, pp.107635. ⟨10.1016/j.measurement.2020.107635⟩. ⟨hal-02501595⟩