Thermo-mechanical monitoring by fiber optic devices on UHTC structures (Comunicazione a convegno)

Type
Label
  • Thermo-mechanical monitoring by fiber optic devices on UHTC structures (Comunicazione a convegno) (literal)
Anno
  • 2009-01-01T00:00:00+01:00 (literal)
Alternative label
  • Latini V.; Striano V.; Monteverde F.; Rendina I.; Parolini C. (2009)
    Thermo-mechanical monitoring by fiber optic devices on UHTC structures
    in 6th European Workshop on Thermal Protection Systems and Hot Structures, Stuttgart (Germany)
    (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#autori
  • Latini V.; Striano V.; Monteverde F.; Rendina I.; Parolini C. (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#note
  • In: 6th European Workshop on Thermal Protection Systems and Hot Structures (Stuttgart (Germany), 1-3 april 2009). (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#descrizioneSinteticaDelProdotto
  • In aerospace applications the development of a reliable method of structural health monitoring (SHM) is one of the most important keys in maintaining the integrity and safety of structures, avoiding catastrophic failure. The research program DEDALO aims to develop a real size UHTC-based prototype with a complex shape equipped with a SHM system for damage detection. A multidisciplinary approach has been adopted involving mechanical design, investigations on material and manufacturing processes and development of optical devices to detect strain and temperature on UHTC. Former activities merged into the manufacturing of a prototype hot structure supplied with optical sensing nodes to perform a functional test at high temperature. This communication describes the preliminary findings of the project.A series of ZrB2-based ceramic composites was studied adjusting type, concentration and granulometry of reinforcing phases and additives to further identify the optimal composition for the hot structure. A pressureless sintering manufacturing process was selected privileging a near-net-shape approach to reduce the manufacturing costs. A SHM system was developed using commercial high temperature Fiber optic Bragg Grating (FBG), for thermal monitoring, and custom silica-sapphire fiber optic strain sensor, based on Fabry-Pèrot configuration, allowing simultaneous and real time measurement of temperature and structural loads applied on the structure under investigation. A ceramic flexible structure was developed to ease sensor installation procedure, on complex shape test-articles. The fiber optic sensors interrogation system was developed based on tunable laser source. Preliminary thermal and mechanical tests showed sensor robustness at high temperature and good accuracy on strain measurement (0,6 με) up to 800°C. A preliminary tile-shaped hot structure was manufactured, equipped with the prototype SHMS and functionally tested at high temperature. The project will und (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#affiliazioni
  • SAB Aerospace, Italy, Carlo Gavazzi Space, Italy, CNR-ISTEC, Faenza, CNR-IMM, Napoli, Bettini Spa, Italy (literal)
Titolo
  • Thermo-mechanical monitoring by fiber optic devices on UHTC structures (literal)
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