Strength of Advanced Materials
| Numbering Code |
G-ENG05 6B418 LB71 G-ENG06 6B418 LB71 |
Year/Term | 2022 ・ Second semester | |
|---|---|---|---|---|
| Number of Credits | 2 | Course Type | Lecture | |
| Target Year | Target Student | |||
| Language | Japanese | Day/Period | Thu.2 | |
| Instructor name | NISHIKAWA MASAAKI (Graduate School of Engineering Associate Professor) | |||
| Outline and Purpose of the Course | The mechanism underlying mechanical and functional properties are lectured for advanced materials used and developed in advanced fields of current engineering. In particular, advanced composite materials, used for aircraft structure etc., are introduced, with a detailed description of the relationship between microscopic constituent materials and macroscopic properties from the perspective of multiscale mechanics; also the anisotropy of their properties, their fatigue and fracture properties are described in the basic discipline for strength of materials. The latest applications are introduced in the field of various transportation systems including airplanes. | |||
| Course Goals | The course goal is to understand basic concepts of composite materials and the underlying mechanism of their mechanical properties from multiscale viewpoints, while the phsyical understanding of composites is developed based on multiple disciplines. | |||
| Schedule and Contents |
1-2. Concept of composite materials The concept and definition of composite materials, their constituent materials and manufacturing methods are illustrated. Their application to aircraft structures etc. are also introduced. 3-4. Mechanical properties of microscopic constituent materials Resin for matrix and various fiber types are explained including their structure and mechanical properties. The weakest link model and Weibull distribution are described as a basis of the statistic nature of strength. 5-8. Basic mechanical properties The specific strength, the specific stiffness, and the rule of mixture for elastic modulus and strength are lectured. In particular, the detailed explanation is made to the anisotropy of elastic modulus, independent elastic constants in the generalized Hookean law, the anisotropic failure criteria, and laminate theory. The relationship between the mechanical properties of microscopic constituent materials and macroscopic properties of composite materials is also illustrated. 9-10. Micromechanics The mechanism of transverse fracture is illustrated. The mechanical models are described for short fiber reinforced composites and particle dispersed composites. The micromechanical analyses based on finite element method is also illustrated for the physical understanding of the strength of composite materials. 11-13. Fracture mechanics properties Fracture mechanics of anisotropic materials are described. The interlaminar fracture toughness and interlaminar fatigue crack propagation, the critical issues in the application of composite structures, are explained including their underlying mechanism. 14. Process and mechanical properties of composite materials The molding and machining process of composite materials is explained to relate it to their mechanical properties. Fiber preform, the selection of resin, intermediate materials, machining and assembly and inspection methods are overviewed from the academic viewpoints. 15. Feedback *Academic achievement assessment (Reports) |
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| Evaluation Methods and Policy | Grading is based on the reports. The assignments will be given around three times. | |||
| Course Requirements | Mechanics of Materials, Continuum Mechanics, Fundamentals of Materials, Solid Mechanics, Adv. | |||
| Textbooks | Textbooks/References | Supplementary handouts will be distributed in the class. | ||
| References, etc. | D.Hull and T.W.Clyne, An Introduction to Composite Materials, Cambridge University Press. | |||
| Related URL | ||||
