(reserved for 4th year Polytech Annecy-Chambéry students)
May-July 2021, 2 months
Student engineer in Mechanical Materials
Annecy-le-vieux; Maison de la mécatronique; laboratoire Symme
The aim of this course is to develop an innovative experimental manipulation for the identification of the elastic limit based on coupled thermal and kinematic observations.
Indeed, during the deformation of a metallic material, the passage from the elastic (endothermic) to the plastic (exothermic) regime results in a drop in temperature (elastic phase) followed by an increase (plastic phase). In order to study this property, two advanced characterization methods will be used in the laboratory: the measurement of deformations by correlation of images obtained by digital camera and the measurement of temperatures by infrared camera. The development will consist in synchronizing the acquisitions of the visible and infrared cameras with the sensors present on the traction machine that will be used to stress the metallic material.
The challenge will be to determine the experimental conditions allowing the cleanest possible thermal signal to be obtained in elastic and plastic regimes in order to have a precise identification of the transition from one regime to the other. It will then be necessary to test different materials and different types of mechanical stresses to find the most favourable conditions for a relevant observation.
The link with the teaching given at the engineering school Polytech Annecy-Chambéry can be found both on the Materials part (better understanding of the deformation of metallic materials) and on the concrete use of numerical methods seen in TP (post-processing of visible and infrared images).
This internship comes upstream of a funding application for a project that has just been submitted to the National Agency of research. The results of the proposed manipulation will be used to support the arguments put forward in the file if it is retained for the second phase.
The candidate should be interested in discovering the world of research, be curious, have a strong sense of suggestion, be attracted by the development of manipulations and be at ease with digital tools.
Pascale Balland, teacher-researcher IUT GMP / Symme
Emile Roux, teacher-researcher POLYTECH A-C / Symme