Laser Powder Bed Fusion (L-PBF) is the most widespread additive manufacturing method for aluminium alloys. There is a high demand for complex L-PBF parts in the aeronautic sector. Such parts could decrease aircraft weight and allow fuel savings and reduction of the environmental impact of air transportation.

Hydrogen is foreseen to be part of our future energy systems as Europe has the ambition to be a carbon-neutral continent by 2050.

During its re-entry into the atmosphere, the capsule withstands a strong shock due to its hypersonic velocity. This shock generates, near the Thermal Protection System (TPS), a lower velocity but extremely hot and reactive flow. As shown by previous space missions, there are still many uncertainties in the design of heat shields.

A rapidly expanding research area involves the development of routes to shape programmable three-dimensional (3D) structures with feature sizes in the mesoscopic range (that is, between tens of nanometres and hundreds of micrometres).

  I will present a unified high-order space and time discontinuous Galerkin solver that simulates hyperbolic PDE's, especially the linearized Euler equations. This kind of method allows us to push mesh adaptation further than classical ALE methods would allow.

With more than 70 successful flights, NASA’s Ingenuity helicopter demonstrated the feasibility of aerial exploration on Mars and opened the door to similar missions on other planets. Future planetary rotorcraft will be bigger and heavier to accomplish new scientific and exploratory goals.

The increasing accessibility of space, fueled by the rise of commercial players, is unlocking new frontiers for technological innovation and scientific discovery.

Exploiting fluid-structure interactions using flexible structures and actuation can improve performance in biologically inspired swimming and morphing airfoils. Open challenges in this realm are the efficient high-fidelity simulation of such fluid-structure interaction phenomena, especially in three-dimensions, as well as solving inverse problems for optimal design and control.

Les maillages courbes, ou d’ordre élevé, sont utilisés depuis longtemps comme support pour simulations par éléments ou volumes finis. Leur flexibilité a traditionnellement été mise à profit pour fournir une meilleure résolution des frontières CAD que celle offerte par des discrétisations linéaires par morceaux.

This thesis addresses the evaluation of several homogenization methods for porous short fiber-reinforced composites (SFRC) in isothermal linear elasticity and elasto-plasticity with hardening. First to ensure an unbiased assessment of these methods, only full-field finite element (FE) versions are developed and studied, excluding analytical mean-field models.