I Fundamental concepts on the structure and physical properties of fibrous materials including single-filament, fiber bundle and fiber re-inforced composites will be provided.
II Regarding the single-filaments with uni-axial symmetry, structure and its analysis as well as their general characteristics will be discussed.
One of the most important applications of organic materials is fibers. Fibers are widely used not only for garments but also as industrial materials. Single fibers have the structural characteristics of uni-axial symmetry and long and thin shape, which are the origin of strength against the tensile load and flexibleness against the torsion and bending deformations. Such characteristics of fibers are efficiently utilized in fiber re-inforced composites. Aim of this class is to give students fundamental knowledge on the structural analysis of single fibers through wide-angle X-ray diffraction/scattering measurement and birefringence measurement and also the fundamental mechanical characteristics of single-filament.
Fiber structure, single-filament, fiber bundle, fiber re-inforced composites, wide-angle X-ray diffraction/scattering, refractive index and birefringence
|Intercultural skills||Communication skills||Specialist skills||Critical thinking skills||Practical and/or problem-solving skills|
This course is held over two academic quarters, with part A for explaining fundamental of fiber materials and analysis of fiber structure and part B for explaining mechanical properties of fiber bundle and fiber re-inforced composites. Contents of part A and part B are closely related. Students are recommended to learn the two courses consecutively. Classes are held mainly using a blackboard, while power-point file and video image are used additionally for providing further understanding.
|Course schedule||Required learning|
|Class 1||General view on fiber science and fiber industry||Current trend in fiber industry|
|Class 2||High-order structure of fibers - High-order structure for providing characteristics of fibers||General concept on fiber structure|
|Class 3||High-order structure of fibers - Fundamentals of wide-angle X-ray diffraction analysis for anisotropic materials||Diffraction theory|
|Class 4||High-order structure of fibers - Wide-angle X-ray diffraction analysis of structure with uni-axial symmetry||Ewald's sphere|
|Class 5||High-order structure of fibers - Fundamentals on refractive index and birefringence of polymeric materials||Lorentz-Lorenz equation|
|Class 6||High-order structure of fibers - Relation between optical properties and high-order structure of fibers||Intrinsic birefringence|
|Class 7||Characteristics of single-filament - Classification of various fiber materials||Natural fibers, chemical fibers and synthetic fibers|
|Class 8||Characteristics of single-filament - Fundamental characteristics of fibers originated from their materials and configurations||moment of inertia of area, polar moment of inertia of area|
High-order structure analysis of plastic products (Nikkan Kogyo Shinbun, in Japanese)
Materials for the classes are provided on OCW-i
Small tests at the end of each class and end-of-the-quarter examination