idw – Informationsdienst Wissenschaft
Nachrichten, Termine, Experten
Nachrichten, Termine, Experten
Periodical maintenance of aeroplanes causes considerable costs. Savings can be achieved through positive planning because the protective measures and optimisation of maintenance intervals depend on the loads. In addition to the available test technology, this objective also requires sensors which are integrated into the structure and can reliably monitor the structural behaviour over long periods of time. The embedding of optical sensor fibres in highly stressed structure units, e.g. trunk sections, tail units or wings is an innovative methodology
The integration methodology for fibre-optic strain gauges is being developed within research and development projects and the strain gauges are being evaluated with regard to their reliability in use. Thus for example fibre-optic Bragg grating sensors can be applied to surfaces of composite units and aluminium structures of aeroplanes.
The reliable determination of structural changes includes the precise knowledge of sensor strain transfer function after installation and operational load (thermal cycles, alternating loads ...).
For this purpose the Federal Institute for Materials Research and Testing (BAM) together with EADS Innovation Works is developing and testing application methods. Those questions which have influence on the strain transfer characteristic between a structure unit and a sensor - and thus on the reliability of the measurement results - are being clarified. These findings not only ensure improved maintenance, but make possible the optimisation of materials and design simultaneously across the entire range of aviation using this new and innovative sensor technology.
BAM, together with EADS, will use a demonstration object to present this monitoring method.
Information:
Dr.-Ing. Wolfgang Habel
Working Group "Fibre Optic Sensors"
of Division VIII.1 "Measurement and Testing Technology; Sensors"
Phone: +49 30 8104-1916 or +49 30 8104-1910
Email: wolfgang.habel@bam.de
Criteria of this press release:
Materials sciences, Traffic / transport
transregional, national
Research results, Transfer of Science or Research
English
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