Periodic Reporting for period 1 - DIMES (Development of Integrated MEasurement Systems)
Reporting period: 2019-01-01 to 2019-12-31
Recent work in the Clean Sky 2 INSTRUCTIVE project has shown that representative flight cycle loading can be used to generate a thermal signal which is sufficient to detect the initiation of damage in metallic components based on the thermoelastic effect. At the same time, compact low-cost microbolometer systems have become available for thermoelastic stress analysis; so that it is viable to translate thermoelastic stress analysis into the structural health monitoring domain by combining these developments to allow whole-field detection of damage during flight-cycle loading without any special surface preparation. In the DIMES project, this capability has been delivered in an instrumented test bench at EMPA that includes a section of an Airbus wing and represents an advance on the state-of-the-art.
In the next stage of the project, the capabilities of the prototype integrated measurement system will be verified and the system will be demonstrated on an assembled A320 wing subject to deformation due to loads representative of flight cycles at the topic manager's site and will represent a substantial advance in the state-of-the-art relative to these prior studies which have used flat or near-flat reinforced panels about 1x1 metre.
The development of an automated system, which integrates data acquisition from a diverse set of sensors with a user interface and allows continuous operation during a structure test, will result in state-of-the-art instrumentation. And, the requirement for the system to allow multi-interface options with Commercial-Off-The-Shelf (COTS) sensors and automated linking to the test control system, is likely to lead to instrumentation for which there will be a market in the worldwide aerospace industry and that could be further developed for other industries, such as the power generation industry. The demonstration in an industrial environment of the multi-faceted technologies in the integrated measurement system is likely to provide a boost to further fundamental research on sensor technology, data acquisition and processing methodologies and development of more efficient design prototyping. Consequently, the proposed research represents a significant and generic advance in the technology and methodologies used to test prototype structures and perform on-line structural health monitoring which is likely to be of benefit to the European aerospace industry, in the first instance, but subsequently to a wider range of industrial sectors.