I Fundamental concepts on the structure and physical properties of fibrous materials including single-filament, fiber bundles and fiber re-inforced composites will be provided.
II Processing and resultant characteristics of fiber bundles and fiber re-inforced composites 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 characteristics of fiber bundles and fiber re-inforced composites.
Fiber structure, fiber bundles, fiber-reinforced composites, cumulative distribution function of fiber strength, interfacial shear strength
|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||Review of fibers and fiber re-inforced composites A||Current trend of fiber re-inforced composites|
|Class 2||Property of single-filament - Fiber morphology and units for mechanical properties||Linear density, fineness, specific strength, specific modulus|
|Class 3||Property of single-filament - Relation between mechanical properties of fibers and high-order structure of fibers||Strength, modulus, elongation, toughness|
|Class 4||Characteristics of fiber bundles||Cumulative distribution function of fiber strength|
|Class 5||Mechanical properties of fiber bundles||Weibull distribution|
|Class 6||Microscopic analysis on mechanical behavior of fiber re-inforced composites||Rule of mixture, short fiber re-inforced composites|
|Class 7||Mechanical properties and its anisotropy of fiber re-inforced composites||Cox's theory, limiting fiber length, interfacial shear strength|
|Class 8||Summary on fibers and fiber re-inforced composites||Reuse and recycle of fibers|
Materials for the classes will be provided on OCW-i
small tests at the end of each class and end-of-the-quarter examination