Les Mureaux, Île-de-France, France
Member of the ESA embedded team at ArianeGroup premises, monitoring the development of Ariane 6 Launcher structures
In charge of the technical aspects related to the production and design evolutions of 5.4m diameter cryogenic tanks for Ariane 5 (Main cryogenic stage : LH2/LOX tank with common bulkhead, Upper stage : LH2 tank), main duties: -Managed a ~12 people team divided into 4 expertise areas (design, structures, metallic processes, non-metallic processes) -As a member of the management board of the company, dealt with daily production and organizational issues -Acted as technical authority on LH2 tank for PIC ESCA+ project -Managed engineering work packages for ESCA+, ARTA projects, obsolescence and shortfall contracts
Structural Engineer for Launcher activities Sizing, justification and qualification of cryogenic tanks and equipment for various projects -Research and Technology : cryogenic composites -Preliminary studies: cryogenic stage architectures -Technology demonstrators: Cryofenix (liquid hydrogen experiment on a sounding rocket), Helium heater for 20K pressurisation -Ariane development : equipment for A5ME (pressurisation line) and A6PHH (cryogenic lines), cryogenic tanks for A6PPH -Ariane 5 production: structural authority on ESCA RLOx tank and SSHeL
Buckling of thin cylindrical shells under combined loadings: internal pressure, bending, compression, and transverse shear; under a research grant from Astrium ST and CNES: -Undertook an extensive experimental campaign, with shells having different R/t ratios, and different levels of internal pressure (200+ tests) -Conducted a numerical study using finite element software ABAQUS and STANLAX to evaluate the impact of relevant imperfections for design purposes, better understand the influence of pressure on the buckling behavior and the interaction between different kinds of loading -Suggested new design recommendations against buckling to improve the NASA SP8007.
Compressive response and failure of balsa wood: -Established experimentally the elastic and inelastic properties of the material in the three directions as a function of its density -Characterized its microstructure and evolution under failure using scanning electron microscopy