1. Mechanical Department, Faculty of Technology , University of Msila , Msila , Algeria
2. Materials and Structural Mechanics Laboratory (LMMS) . University of M’sila , M’sila , Algeria
3. Faculty of Technology , M’hamed Bougara, University , Boumerdes , Algeria
4. Laboratoire de Matériaux, et Mécanique des Structures (LMMS) , Université SBA . Sidi Bel Abesse , Algérie