Modeling of material microstructures allows the simulation of their mechanicalbehavior in operation, and so the optimization and greater reliability in the design of parts, for more reliable and efficient aircraft engines... In addition, improving the engine performance means increasing the combustion gas temperatures and consequently requires a thorough optimization of the mechanicalbehavior of the materials at high temperatures
The mechanical simulations in these volumes at microscopic scale are used in the framework of multi-scale methods, developed at Onera by Jean-Louis Chaboche's team, and increasingly used in industry for designing the parts that are the most thermally and mechanically stressed... A simulation, like those the results of which can be seen above, gives" the micro" stresses, using the local behavior law
In numerical simulations of aircraft, fluid mechanics specialists model the motion of air around the wings or in the engines, and structural mechanics researchers analyze the behaviour of the mechanical parts. But the air and the aircraft's structure are not unrelated: they interact with one
Onera researchers are working on the behaviour of wind turbines... To get a better understanding of these phenomena, researchers divided the blades numerically into small sections and then calculated their mechanical characteristics using programs adapted to these types of composites
At present, only space can offer measurement conditions that are this accurate for mechanical experiments... The least difference in their behaviors would throw the principle of equivalence into doubt
