Team 4: Formation of materials by plastic deformation and nonlinear vibrations (MFMDPVNL)

Team leader: Professor BOUTABBA Smail CV

Team members 4:

Last and first name	Grade	Specialty	Structure
BOUTABBA Smail	Pr	Mechanical construction	Univ. May 08, 1945 Guelma
KRIBES Nabil	MCA	Mechanical manufacturing	Univ. May 08, 1945 Guelma
MERABET Aziz	MAA	Mechanical construction	Univ. May 08, 1945 Guelma
HADDAD Abdelkrim	Pr	Thermal Energy	Univ. May 08, 1945 Guelma
BOUKHAROUBA abdelmalek	PhD student	Mechanical construction	Univ. May 08, 1945 Guelma
CHEDDADI Sihem	PhD student	Mechanical construction	Univ. May 08, 1945 Guelma
KHALLEF Ahmed	PhD student	Mechanical construction	Univ. May 08, 1945 Guelma
BOUGHAZI Nahla	PhD student	Energy	Univ. May 08, 1945 Guelma
BELBELLAA Younes	PhD student	Materials	Univ. May 08, 1945 Guelma

a). Overall objectives:

This team will be in charge of studying the development of the numerical simulation of thermomechanical processes for shaping materials by plastic deformation.

It will also have for stain:

• The study of nonlinear dynamic systems, their characterization by topological, graphical, numerical and analytical methods as well as the determination of the stability domain based on the Lyapunov theory;

• Dynamic study of rigid and flexible rotors and their stabilities;

• The influence of cutting materials, machined materials and cutting speeds on the surface condition of machined parts;

• Vibratory analysis of the cutting tool and its influence on the surface conditions of the machined parts.

b). Scientific Foundations:

• Existing laws of surface behavior in the modeling of contact with or without friction must be improved to better approach real conditions;

• Improve the friction law, known as the plastic wave, studied for several years for the contacts between a rigid indenter and an elastoplastic body in order to be used in place of the Coulomb and Tresca laws;

• Experimental identification of parameters by appropriate friction tests;

• Study of self-sustaining nonlinear oscillations and relaxation oscillations;

• Topological study of nonlinear oscillations;

• Analysis of non-linear dynamic systems by graphical and analytical methods;

• Study of singular points and stability of nonlinear systems;

• Evolution of cutting forces, tool wear and their influence on the surface condition of the machined parts.

Keywords:

Modeling, friction, plastic wave, nonlinear vibration, topological study, stability, rigid rotor, flexible rotor, balancing, cutting forces, surface condition, wear.