1. Faculty of Engineering Sciences, University Constantine 1, Constantine, Algeria
2. Mechanical Department, Faculty of Applied Sciences, University of Larbi Ben M’Hidi, Oum El Bouaghi, Algeria
3. Laboratory of Structure Mechanics, EMP, Algiers, Algeria
4. CRIStAL CNRS-UMR 9189, Polytech’Lille, University of Lille 1, Villeneuve d’Ascq, France