Prof. Samir Lecheb is a lecturer at the Mechanical Engineering Department, Faculty of Technology, M'hamed Bougara University of Boumerdes. He is also a team member of research at the Dynamic Motor and Vibroacoustic Laboratory. His scientific interests are nondestructive test fracture mechanic and vibration. His interest fields are fatigue composite material and maintenance. He also a member of editorial of two books of Proceedings published by Springer Publisher.

Prof. Ahmed Chellil is a lecturer at the Mechanical Engineering Department, Faculty of Technology, M'hamed Bougara University of Boumerdes. He is also a team member of research at the Dynamic Motor and Vibroacoustic Laboratory. His scientific interests are vibration and nondestructive test fracture mechanic. His interest fields are fatigue composite material and maintenance. He also a member of editorial of two books of Proceedings published by Springer Publisher.

Prof. Brahim Safi is a lecturer at the Process Engineering Department, Faculty of Technology. He is also the Head of Research Team: Eco-Materials, Recycling and Recovery of Wastes in Materials, at Research Unit: Materials, Processes and Environment. His scientific interests are wastes recycling in concrete materials and materials characterization. His interest fields are construction and building materials, mechanical behavior of materials, and rheology of fluids. He also an editor/member of editorial of two books of Proceedings published by Springer Publisher.

Dr. Kamel Ikkache is a lecturer at the Mechanical Engineering Department, Faculty of Technology, M'hamed Bougara University of Boumerdes. He is also a team member of research at the Dynamic Motor and Vibroacoustic Laboratory. Effect of stitch orientation on tensile. His scientific interests are vibration and cutter cutting. His interest fields are fatigue composite material and maintenance

Dr. Hamza Mechakra is a lecturer at the Mechanical Engineering Department, Faculty of Technology, M'hamed Bougara University of Boumerdes. He is also a team member of research at the Dynamic Motor and Vibroacoustic Laboratory. Effect of stitch orientation on tensile. His scientific interests are fatigue composite material. His interest fields are fracture mechanic and maintenance. He is also an editor of editorial of book of proceedings 4th ISMSD2019 -

Prof. Abdelhakim Daoui is a lecturer at Civil Engineering Department, Faculty of Technology, M'hamed Bougara University of Boumerdes. He is also head of the Building Materials and Structures Laboratory. Effect of stitch orientation on tensile. His scientific interests are physico-mechanical characterization of composite, metallic and other materials by conventional methods and non-destructive evaluation. He also a member of editorial of book of Proceedings published by Springer Publisher.