Dissertation/ Thesis
Fracture behaviour on natural fibre reinforced composites ; Comportement à la rupture d'un composite à fibres végétales
| العنوان: | Fracture behaviour on natural fibre reinforced composites ; Comportement à la rupture d'un composite à fibres végétales |
|---|---|
| المؤلفون: | Alia, Adem |
| المساهمون: | Matériaux, ingénierie et science Villeurbanne (MATEIS), Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Université de Lyon-Institut National des Sciences Appliquées de Lyon (INSA Lyon), Université de Lyon-Institut National des Sciences Appliquées (INSA)-Institut National des Sciences Appliquées (INSA)-Centre National de la Recherche Scientifique (CNRS), Université de Lyon, Université Ferhat Abbas (Sétif, Algérie), Hocine Osmani, Pascal Reynaud |
| المصدر: | https://theses.hal.science/tel-03078513 ; Matériaux. Université de Lyon; Université Ferhat Abbas (Sétif, Algérie), 2020. Français. ⟨NNT : 2020LYSEI016⟩. |
| بيانات النشر: | HAL CCSD |
| سنة النشر: | 2020 |
| المجموعة: | HAL Lyon 1 (University Claude Bernard Lyon 1) |
| مصطلحات موضوعية: | Materials, Organic matrix composites, Natural fibers composites, Woven composites, Woven reinforcement, Mechanical behaviour, Structure damage, Micromechanical behaviour, Structural analysis, Damage behavior, Cyclic deformation, Composite, Acoustic emission, In situ tests, Digital Image Correlation, Matériaux, Composites à matrice organique, Composites à fibres végétales, Composites tissés, Renforts tissés, Comportement mécanique, Endommagement mécanique, Comportement micromécanique, Analyse structurelle, Sollicitation mécanique, Fatigue cyclique, Matériau composite, Emission acoustique, Essai in situ, Corrélation d'images numériques |
| الوصف: | The objective of this thesis is the characterization of the mechanical behavior and the damage of a woven jute / polyester composite. natural fibers are indeed an interesting ecological alternative to synthetic fibers, in particular glass fibers which are the most used for composite manufacturing. The studied composite is developed in the LMNM laboratory at IOMP, Sétif, Algeria. Two fibre orientations ([0] 8 and [+ 45 / -45] 2S) are considered. The mechanical characterization is carried out in monotonic tensile and compression as well as in cyclic fatigue. Mechanical and microstructural characterizations are carried out in the MATEIS laboratory. The study of the damage is carried out by combining five techniques: the evolution of mechanical parameters via cyclic and fatigue tests, microscopy, acoustic emission (EA), image correlation and micro- RX tomography. The study of the evolution of the mechanical parameters combined with the global analysis of the AE provides first indicators concerning the development of the damage during the tests. Microstructural analyzes allow to finely identify the damage mechanisms that occur during mechanical tests (fiber / matrix decohesions, matrix cracks and fiber breakage). For the segmentation of acoustic emission signals in monotonic tests, an unsupervised classification is used, emphasizing the choice of descriptors and the labeling of the classes obtained. Tensile tests instrumented by image correlation as well as in situ tensile tests under tomography allow to identify the chronology of appearance of the damage. These results are also used to label the obtained classes . The labeled signals are then used to create a library to identify the chronology of evolution of the modes of damage in cyclic fatigue achieved by supervised classification. Finally, all these analyzes made it possible to establish damage scenarios for the different damage modes and for the two orientations. It is thus possible to reconsider the development to optimize the mechanical properties. ... |
| نوع الوثيقة: | doctoral or postdoctoral thesis |
| اللغة: | French |
| Relation: | NNT: 2020LYSEI016; tel-03078513; https://theses.hal.science/tel-03078513; https://theses.hal.science/tel-03078513/document; https://theses.hal.science/tel-03078513/file/these.pdf |
| الاتاحة: | https://theses.hal.science/tel-03078513 https://theses.hal.science/tel-03078513/document https://theses.hal.science/tel-03078513/file/these.pdf |
| Rights: | info:eu-repo/semantics/OpenAccess |
| رقم الانضمام: | edsbas.9D578922 |
| قاعدة البيانات: | BASE |
| الوصف غير متاح. |