New, eco-efficient aircrafts are challenged by a demand to significantly reduce the CO2 and NOx emission. To achieve these goals, the topic manager is exploring new configurations for integrating advanced engines and propulsion concepts to the aircraft. Most of such promising concepts as the CROR-engine, Boundary Ingestion Layer (BIL), Ultra High Bypass Ratio engines (UHBR), multiple fan cannot be targeted simply by replacing engines of the current generation, but require a substantial change of the principle aircraft configuration. In case of un-ducted engine architecture as the CROR, the rearward shift of the engines away from the wing provides additional advantages in cabin noise and passenger comfort and safety improvement. Regarding the safety, main issue is the CROR engine debris that can be release with high energy when there is a failure. It is mandatory to develop innovative solutions for panels and shielding able to shield and reduce damage at impact, to secure the airframe integrity, so that aircraft can make safe continuation of flight and landing after engine burst event. The goal of REDISH is the development and maturation of innovative shielding able to sustain impacts from high and low energy debris caused by CROR engine burst. A coupled experimental-numerical development approach at two structural scales (laminate/panel and component) is proposed that starts from a large pool of possible configurations that will be downselected in successive analysis steps of increasing detail. Virtual testing by means of high-fidelity simulation tools developed by the consortium will be used to decrease the need for costly physical testing as much as possible and accelerate the shielding development process. The specimens to be manufactured and tested are the ones strictly necessary to validate the numerical simulations and assure the highest educated selection of the actual solution to be implemented for CROR Engine Debris Impact SHielding.
NEODAMP is marked in the ITD Airframe part B, oriented to highly integrated innovative structural components, for the Large Passenger Aircraft. NEODAMP will develop new prepreg composite materials for structural purposes in the aircraft, able to support structural loads and other additional functions. The project is focused on acoustic damping and complemented with electrical conductivity studies while using techniques related to additional embedded and/or integrated functionality. Composite materials will be chosen among those provided by a widely experienced manufacturer, to meet the future needs and requirements given by the topic manager. Activities are distributed along 36 months, and tasks are associated to 3 main topics: material development, screening and process ability. In order to find the optimal material, a series of key characteristics will be selected, such as acoustic damping, structural and mechanical properties, HSE requirements, Fire, Smoke&Toxicity resistance for fuselage applications, resistance to environmental factors, automatic manufacturing and costs. The damping material will be improved and modified to adjusts properties such as tacking or curing parameters. All the cited features will be deeply studied through a test campaign, at coupon level using raw damping material and the embedded damping prepreg composite material. The wide variety of tests will include from damping behavior and vibro-acoustic performance to lightning strike protection, including aging, common mechanical properties and physicochemical tests. Needed panels and embedded design will be done and manufactured by the partners. Results of the cited works altogether will guide to the optimal design and manufacturing of trials, which will reach to material improvements also. The production of demonstrators will be oriented to automatic fuselage production by using automatic fiber placement techniques and always considering possible solutions for industrialization.