Study of interfacial decohesion and damage mechanisms
| dc.contributor.author | ZERNADJI Sid Ali | |
| dc.contributor.author | ENCA/BENHAMIDA Mohamed | |
| dc.date.accessioned | 2025-06-25T10:13:57Z | |
| dc.date.available | 2025-06-25T10:13:57Z | |
| dc.date.issued | 2025-06-25 | |
| dc.description.abstract | The composite materials industry is undergoing constant evolution, marked by the emergence of new materials and technologies. Faced with the substitution of fossil-based materials, materials of natural origin, and in particular those of plant origin, are beginning to take their place because the development of composite materials was initially closely linked to the aeronautics and aerospace industry. More recently, their scope of application has expanded considerably, now affecting various sectors such as competitive sports, mechanical engineering, pressurized fluid storage, braking systems, as well as medical fields, particularly in surgery and prosthetics. This is the framework of our research work. It focuses on the study of the mechanisms of decohesion and interfacial damage present in a composite structure under static loading, reinforced by cellulosic fibers that have been studied for the first time, extracted from a plant called Echinops spinosissimus that grows in the M’sila region (Algeria) as part of environmental design. This research aims to characterize the decohesion force of an epoxy resin and cellulose fiber reinforcement used for the first time. To do this, several treatments are carried out on the fibers in order to analyze them in several ways. Among the existing chemical treatments, alkaline treatment and permanganate treatment were chosen. Three series of characterization are carried out. The first concerns the different analyses of our fibers such as: Fourier Transform Infrared (FTIR) analyses, X-ray diffraction, mechanical tests. The second series is the study of the interface by micromechanical analysis using micro droplets. Finally, the third series is the mechanical characterization of model composites made from different pretreated Echinops spinosissimus fibers. Selecting these fibers is well justified considering that there is almost no work on these fibers in the literature and on the other hand their abundant availability in Algeria. This renewable natural resource deserves to be valued because it is very useful for developing environmentally friendly materials. The various characterization methods used in this study revealed that these new materials have very high-level properties, particularly mechanical properties, capable of competing with those of conventional composites based on glass and carbon fibers. | |
| dc.identifier.other | DOC/GM1359/2025 | |
| dc.identifier.uri | https://repository.univ-msila.dz/handle/123456789/46440 | |
| dc.language.iso | en | |
| dc.publisher | Mohamed Boudiaf University of M'sila | |
| dc.relation.ispartofseries | 2025 | |
| dc.subject | Echinops spinosissimus | |
| dc.subject | composite | |
| dc.subject | chemical treatment | |
| dc.subject | interface | |
| dc.subject | pull-out | |
| dc.subject | decohesion. | |
| dc.title | Study of interfacial decohesion and damage mechanisms | |
| dc.type | Thesis |