Project description DEENESFRITPL New standards to mitigate the risk from planetary gearbox failures A planetary gearbox is a gearbox with the input and the output shafts aligned. It is a critical component in systems that power everything from construction machines to turbofan engines. Its use is highly necessary for applications that demand high torque density, operational efficiency and durability. Rolling-contact fatigue is typical for planetary gearboxes, causing crack-like flaws. The EU-funded IDERPLANE project aims to establish criteria for assessing the safety of planet bearings for use in aerospace applications. Focus will be placed on determining the damage tolerance of the component (for example, the critical size of defects that leads to failure) to better assess the risk of a catastrophic failure. Show the project objective Hide the project objective Objective The high power transmissions that have to be designed for modern highly efficient turbofans need the extensive application of epicyclical gears with planet gear containing an integrated bearing.These components are subjected to severe rolling contact fatigue (RCF) conditions as many others (e.g. wheels/rails of high speed trains): propagation of micro-cracks starting from the bearing race surface and leading to spalling is a typical damage mode of these components. The main idea behind IDERPLANE is to analyze the problem not in terms of the usual stress-based design of gears, but rather on damage tolerance concepts. This kind of analysis is meant at understanding/measuring the risk of a catastrophic failure in the case of development of subsurface propagation of cracks driven by shear stresses. Incidentally, it has to be emphasized that spalls can lead to sub-surface cracks only once they have reached a critical size. If this could be seen an established route, unfortunately RCF is a grey area where there are no data available for such an analysis (that should be based on reliable crack growth curves), because it is very difficult to make cracks propagate under shear as it happens in RCF (and as it was shown in the known failures of planet gear containing an integrated bearing). This is the strength and unicity of the IDERPLANE consortium where the partners have special technology and abilities: to obtain crack growth curves under RCF conditions on specimens (PoliMI) ; to reproduce the subsurface crack propagation in bi-disks experiments (UniBS); to follow and track the development of cracks under complex load conditions (INSA). Fields of science engineering and technologymechanical engineeringvehicle engineeringaerospace engineeringaircraft Keywords Planet bearing power transmission RCF defect tolerance reliability Programme(s) H2020-EU.3.4. - SOCIETAL CHALLENGES - Smart, Green And Integrated Transport Main Programme H2020-EU.3.4.5.1. - IADP Large Passenger Aircraft Topic(s) JTI-CS2-2017-CfP07-LPA-01-36 - Innovative design for reliable and low weight power gearbox planet bearings Call for proposal H2020-CS2-CFP07-2017-02 See other projects for this call Funding Scheme IA - Innovation action Coordinator POLITECNICO DI MILANO Net EU contribution € 254 375,00 Address PIAZZA LEONARDO DA VINCI 32 20133 Milano Italy See on map Region Nord-Ovest Lombardia Milano Activity type Higher or Secondary Education Establishments Links Contact the organisation Opens in new window Website Opens in new window Participation in EU R&I programmes Opens in new window HORIZON collaboration network Opens in new window Total cost € 254 375,00 Participants (4) Sort alphabetically Sort by Net EU contribution Expand all Collapse all UNIVERSITA DEGLI STUDI DI BRESCIA Italy Net EU contribution € 273 125,00 Address PIAZZA MERCATO 15 25121 Brescia See on map Region Nord-Ovest Lombardia Brescia Activity type Higher or Secondary Education Establishments Links Contact the organisation Opens in new window Website Opens in new window Participation in EU R&I programmes Opens in new window HORIZON collaboration network Opens in new window Total cost € 273 125,00 INSTITUT NATIONAL DES SCIENCES APPLIQUEES DE LYON France Net EU contribution € 145 343,75 Address 20 AVENUE ALBERT EINSTEIN 69621 Villeurbanne Cedex See on map Region Auvergne-Rhône-Alpes Rhône-Alpes Rhône Activity type Higher or Secondary Education Establishments Links Contact the organisation Opens in new window Website Opens in new window Participation in EU R&I programmes Opens in new window HORIZON collaboration network Opens in new window Total cost € 145 343,75 LIBERA UNIVERSITA DI BOLZANO Italy Net EU contribution € 50 000,00 Address PIAZZA UNIVERSITA 1 39100 Bolzano See on map Region Nord-Est Provincia Autonoma di Bolzano/Bozen Bolzano-Bozen Activity type Higher or Secondary Education Establishments Links Contact the organisation Opens in new window Website Opens in new window Participation in EU R&I programmes Opens in new window HORIZON collaboration network Opens in new window Total cost € 50 000,00 ARGO SRL Italy Net EU contribution € 27 125,00 Address VIA ETTORE DE SONNAZ 14 10121 TORINO See on map SME The organization defined itself as SME (small and medium-sized enterprise) at the time the Grant Agreement was signed. Yes Region Nord-Ovest Piemonte Torino Activity type Private for-profit entities (excluding Higher or Secondary Education Establishments) Links Contact the organisation Opens in new window Participation in EU R&I programmes Opens in new window HORIZON collaboration network Opens in new window Total cost € 91 043,50
