Damage Diagnostics to support Maintenance, Repair and Overhaul for SUSTAINability increase of Airframe and Engine Parts
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13th EASN International Conference on Innovation in Aviation & Space for opening New Horizons
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The Horizon 2020 project SUSTAINair addresses the aspects of circular design by researching numerous key enabling technologies for tomorrow?s multi-material joints. Among these, the project work package ?Damage Diagnostics? researches novel sensor technologies and their application for SHM of a joint to reduce manufacturing and operational uncertainties on the integrity. This shall enable the transformation from today?s scheduled to tomorrow?s condition-based and predictive maintenance, thereby, avoiding operational downtimes and supporting repair and overhaul by early damage identification. The research includes, (i) the fundamental understanding of joint damage initiation and propagation, (ii) the development and tailoring of sensors and their structural integration, and (iii) the identification and evaluation of measurable damage effects and the development of reliable damage diagnostics in operational conditions. A co-cured pinned hybrid titanium-composite single-lap-shear (SLS) joint is used as a case example. Static and cyclic tension tests are used to analyze the damaging behavior of the considered hybrid SLS joint. Furthermore, a multi-method damage diagnostic concept for pinned hybrid joints that applies piezoelectric sensors and electric contacting of the structure itself for sensing, and uses various active and passive damage evaluation methods is presented and experimentally demonstrated by the considered hybrid SLS joint.