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Design, analysis and optimization of multi-material and composite structures: computation of cost-mass-performance trade-off curves in the concurrent design phase (examples are given hereafter)
  • Performance – cost –mass optimization of stiffened panels for aircraft structures, of cargo frames, beams, struts and floor, of other composite multi-body assemblies …
  • Performance – cost - mass optimization of a composite aeroengine test bench incorporating metallic parts, laminated and sandwich panels, metallic and composite stiffeners, …
  • Design and optimization of a composite spacecraft structure (filament wound bars, HLU parts, metallic fittings, …) with a mass minimization objective (payload), under static and dynamic loading
  • Aeroelastic tailoring of business jet wing structure wrt aerodynamic performance and structural strength & stiffness
  • Structural integrity assessment of composite antennas (static, dynamic, thermal loads), failure analysis and parametric studies
  • Cost-mass-performance optimization of a composite pax door with strong topology and lay-up changes
  • Structural analysis and assessment of composite aeroengine parts with thermoplastic matrix reinforced with short fibres
  • Draping and stacking sequence optimization on composite nacelles
  • Impact analysis, static and fatigue crack analysis in composite overwrapped pressure vessels (COPV)
Multi-scale modeling of damage and failure
  • Simple load carrying capacity analyses based on standards failure criteria (reference and fail safe configurations)
  • Non-linear failure analyses with ply failure models and delamination models (Cohesive Zone or interface elements)
  • Ply failure model development and identification towards dedicated experiments
  • Impact analysis, static and fatigue crack analysis in composite overwrapped pressure vessels (COPV)
  • Support to non destructive inspection (NDI / NDT) and structural health monitoring (SHM): simulation of interactions between defects and signals (ex: delamination and Lamb Waves), signal processing and pattern recognition for prediction of the critical level and location of defects
Design and analysis of adhesively bonded structures
  • Static and fatigue analysis of adhesively bonded structures with or without composite elements (examples includes bonded-riveted stiffeners on composite panels, multi-layer photovoltaïc systems with optimized bondline thickness and material, design and optimization of the joining of piezoelectric actuators on composite panels, design of dedicated tests and identification procedures for the determination of the constitutive properties of adhesive joints, etc.)
Modeling and optimization of manufacturing processes
  • Prediction of local fibre architecture
    • Computational chain for the optimization of parts produced by injection of thermoplastic resin reinforced with short fibres
    • Draping simulation using commercial software, integrated in the CAD/CAE framework
    • Prototype braiding and weaving simulation tool (from bobbins parameters to local compaction of fibres)
  • Prediction of chemical and thermal shrinkage in highly curved areas with complex reinforcement, for open and closed molds processing routes
    • Thermal-chemical-mechanical computational scheme integrated in the industrial CAD/CAE framework
    • Prediction of spring-in / spring-back of profile with constant or variable sections, with double curvature, …
    • Link with the manufacturing process (Hand lay-up, Automated Tape Laying, Automated Fibre Placement, Braiding, Filament winding, …)
    • Mold compensation and support to mold reengineering
    • Thermal-mechanical simulations of molds for minimization of heating power with the constraint of sufficient structural stiffness and strength, heating system optimization for respect of curing cycles, structural optimization for minimum thermal deformation of the molds, link with the curing of the parts
  • Global modeling of machining of composite materials
    • Simulation of machining and release of frozen-in deformations and stresses
    • Link with local degradation (delamination) of the material
    • Prediction of the spring-back after machining (trimming, drilling, …)