Iheb Cherif, PhD student at LaBoMaP, will defend his thesis entitled "Modeling and experimental validation of the distortion of machined plates" on Thursday, November 7, 2019, at 9:00 a.m. in lecture hall 2.
JURY MEMBERS
Rapporteurs:
- Ms. Katia MOCELLIN, Senior Researcher, CEMEF, Mines ParisTech
- Ms. Hélène CHANAL, Senior Lecturer, SIGMA Clermont
Reviewers:
- Mr. Mohammed NOUARI, University Professor, LEM3, University of Lorraine
- Mr. Gérard POULACHON, University Professor, LaBoMaP, Arts et Métiers
- Mr. José OUTEIRO, Senior Lecturer, LaBoMaP, Arts et Métiers
- Mr. Dominique COTTON, professor and researcher, LaBoMaP, Arts et Métiers
Guest:
- Mr. Alexandre BROSSE, Doctor of Engineering, FRAMATOME
SUMMARY
The heat exchangers in new generations of nuclear reactors are made of AISI 316L stainless steel sheets. These compact exchangers improve thermal efficiency and thus energy production. During the manufacturing of the plates, residual stresses appear and can cause distortion. In order to ensure the assembly of these plates, this distortion must be controlled and minimized, mainly by monitoring the evolution of the residual stress field.
The residual stresses generated during the processes preceding machining were measured using various methods. These residual stresses were then incorporated into a numerical distortion model that took into account sequence effects and clamping during machining. The model was experimentally validated using an intelligent experimental device consisting of force sensors integrated into a clamping system developed specifically for the thesis. It also made it possible to study the influence of machining conditions on plate deformation.
Finally, the distortion model developed was used to optimize the machining strategy in order to minimize distortion in industrial sheet metal.
Keywords: Residual stresses; Machining; Distortion; Numerical simulation.
PRACTICAL INFORMATION
The defense will take place on Thursday, November 7, 2019, at 9 a.m. in Lecture Hall 2.
Arts et Métiers Campus Arts et Métiers Cluny - Rue Porte de Paris - 71250 Cluny
