Course: Structural Mechanics of fibrous assemblies

» List of faculties » FT » KTT
Course title Structural Mechanics of fibrous assemblies
Course code KTT/SMV
Organizational form of instruction Lecture + Lesson
Level of course Master
Year of study not specified
Semester Winter and summer
Number of ECTS credits 6
Language of instruction Czech
Status of course Compulsory
Form of instruction Face-to-face
Work placements Course does not contain work placement
Recommended optional programme components None
Lecturer(s)
  • Mertová Iva, Ing. Ph.D.
  • Vyšanská Monika, Ing. Ph.D.
  • Neckář Bohuslav, prof. Ing. DrSc.
Course content
Lectures: 1. Introduction - basic terms, definitions and relations of mechanics, solids and deformable bodies, continuum and structural mechanics. 2. Fiber orientation - description of orientation in space, orientation in sections, model of orientation in a plane. 3. Stochastic theory of fiber-to-fiber contacts - their density according Wyk, and distribution. 4. Compression of fibrous material - model according Wyk, its generalization, corrections. 5. Tensioning of parallel fiber bundle - generalization of Hamburger's theory for a general number of components. 6. Tensioning of fiber bundle - bundle with variable strength, strain and fiber waviness. 7. Tensioning of multi-axial textiles - stress-strain curve, strength and breaking strain of fibers, fiber systems and whole multiaxial textiles, regular multiaxial textiles. 8. Textiles with continuous distribution of fiber directions - forces in fibers and textile, influence of fiber orientation to mechanical properties, textiles with preference of one fiber direction. 9. Yarn strength and gauge lengths - weakest link principle, stochastic model of independent strengths of a short and long sections, Peirce, Weibull. 10 Yarn strengths as a stationary, ergodic, Markovian, and Gaussian random process. Practices: Applications of lectures, examples.

Learning activities and teaching methods
Monological explanation (lecture, presentation,briefing), Dialogue metods(conversation,discussion,brainstorming), Project teaching
  • Class attendance - 42 hours per semester
  • Home preparation for classes - 30 hours per semester
  • Preparation for credit - 40 hours per semester
  • Preparation for exam - 60 hours per semester
Learning outcomes
Basic terms, definitions and relations in mechanics. Compression of fibrous material - Wyk's model and its generalization. Strength and breaking strain of parallel fiber bundle. Tensioning of twisted fiber bundles. Tensioning of multi-axial textiles, formations with continual distribution of directions, tensioning of woven and knitted fabrics.
Student orientates himself in problem area of structure and properties of textiles
Prerequisites
Knowledge of structural theory of fiber assemblies on the bachelor's level, knowledge of mathematics incl. theory of probability, mechanics and textile technologies.

Assessment methods and criteria
Oral exam, Student's performance analysis

Credit: Succesfully written credit test. Exam: The examination is oral. Student can use all arbitrary study-materials by examination. Student must demonstrate very good understanding of all theoretical models, incl. ways of mathematical derivations, by discussion with examiner.
Recommended literature
  • Soubor přednášek (slides) na internetových stránkách katedry.
  • Hearle J.W.S., Grosberg P., Backer S. Structural mechanics of fibers, yarns and fabrics. Wiley Ltd., New York,, 1969.
  • Neckář B., Das. D. Theory of structure and mechanics of fiber assemblies. Woodhead Publishing, 2012.
  • Neckář B., Ibrahim S. Structural theory of fibrous assemblies and yarns. TU Liberec, 2003.
  • Neckář B. Morfologie a strukturní mechanika obecných vlákenných útvarů. TU Liberec, 1989.
  • Neckář, B. Příze - tvorba, struktura, vlastnosti. SNTL Praha, 1990.
  • Stříž B. Mechanika textilií, I část - Základy mechaniky kontinua. Liberec, 2001.
  • Zurek W. Struktura przedzy. WNT, Warszawa, 1971.


Study plans that include the course
Faculty Study plan (Version) Category of Branch/Specialization Recommended year of study Recommended semester
Faculty: Faculty of Textile Engineering Study plan (Version): Clothing and Textile Engineering (2018) Category: Textile production and clothing industry 1 Recommended year of study:1, Recommended semester: Summer
Faculty: Faculty of Textile Engineering Study plan (Version): Clothing and Textile Engineering (2012) Category: Textile production and clothing industry 1 Recommended year of study:1, Recommended semester: Summer
Faculty: Faculty of Textile Engineering Study plan (Version): Clothing and Textile Engineering (2018) Category: Textile production and clothing industry 1 Recommended year of study:1, Recommended semester: Summer
Faculty: Faculty of Textile Engineering Study plan (Version): Clothing and Textile Technology (2012) Category: Textile production and clothing industry 1 Recommended year of study:1, Recommended semester: Summer
Faculty: Faculty of Textile Engineering Study plan (Version): Clothing and Textile Technology (2012) Category: Textile production and clothing industry 1 Recommended year of study:1, Recommended semester: Summer
Faculty: Faculty of Textile Engineering Study plan (Version): Clothing and Textile Engineering (2012) Category: Textile production and clothing industry 1 Recommended year of study:1, Recommended semester: Summer
Faculty: Faculty of Textile Engineering Study plan (Version): Quality Control (12) Category: Special and interdisciplinary fields 1 Recommended year of study:1, Recommended semester: Summer
Faculty: Faculty of Textile Engineering Study plan (Version): Quality Control (2012) Category: Special and interdisciplinary fields 1 Recommended year of study:1, Recommended semester: Summer