Centre National De La Recherche Scientifique

Ecole Normale Superieure De Cachan

Safran Aircraft Engines

Electricite De France

Ecole Normale Superieure Paris-saclay

Hugo Leclerc

Stéphane Roux

François Hild

Francois Hild

Julien Schneider

Stephane Roux

Cyril Kazymyrenko

Andreea Carpiuc-Prisacari

Martin Poncelet

Clement Jailin

Clément Jailin

A computer-implemented method for identifying mechanical parameters of an object subjected to mechanical stress is provided. The method comprises a step of acquiring, by an imaging means, images of the object taken before and during the application of the mechanical stress, three steps of calculating the effects due to the stress carried out either on the basis of the modeling of the recorded images or on the basis of a theoretical mechanical modeling of the stress, a step of defining a functional equal to the difference between the two models and a last step of minimizing said functional so that the experimental model is as close as possible to the theoretical mechanical model. Additional measurements make it possible to refine the method.

Computer-implemented method for identifying mechanical properties by coupled correlation of images and mechanical modelling

A method of characterizing a part including obtaining an X-ray tomography image of the part and then a step of correlating the image with a reference wherein the correlation step includes searching among a predefined set of X-ray tomography image transformations for a transformation that minimizes the difference between the image and the reference in order to characterize the inside of the part.

Method for characterising a part

A tomography scanner includes at least one first emission source (GX), one first matrix detector (D), and a computer (C) arranged to produce an initial tomography of an object (E) based on radiographs arising from the first matrix detector, taken from various angles. The tomography scanner further includes a second emission source (GX) and a second matrix detector (D) arranged so that, when the object is subjected to a loading that is known at a given instant in time, the computer determines the changes in the object subjected to said loading based only on the information from the first radiograph of the object under loading arising from the first matrix detector, from the second radiograph of the object under loading arising from the second matrix detector and the initial tomograph, the first radiograph and the second radiograph being taken simultaneously at the same given instant in time.

'4D' dynamic tomography system

A method allowing the cracking of a material to be controlled, and a device for the implementation of the method are disclosed. A target cracking path is defined in a given volume of material. Mechanical loads are applied to the material in order to control the propagation of a crack in the volume so that the crack propagates along the target path. In order to prevent an unstable propagation of the crack, a stabilization load especially designed for stabilizing the propagation of the crack is applied to the volume.

Method for controlling cracking of a material and associated device for the implementation thereof

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Cachan, France

Hugo Leclerc