Course: Structural Mechanics of Fibrous Assemblies

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Course title Structural Mechanics of Fibrous Assemblies
Course code KTT/D109
Organizational form of instruction Lecture
Level of course Doctoral
Year of study not specified
Semester Winter
Number of ECTS credits 0
Language of instruction Czech, English
Status of course Compulsory-optional
Form of instruction Face-to-face
Work placements Course does not contain work placement
Recommended optional programme components None
  • Vyšanská Monika, Ing. Ph.D.
  • Neckář Bohuslav, prof. Ing. DrSc.
Course content
- General fiber assemblies. Structural parameters, incl. parameters of blends. Theory of pores between fibers and their especial variants (conventional, with constant shape or length), application in flow of fluids. Strength of bundle from two components (Hamburger). - Yarns. Connection of structural parameters, relation fineness-twist-diameter (Koechlin). Helical models, number of fibers in cross-section, parameter, yarn retraction (Braschler et al.). Tensioning and strength (Gegauff), semi-empirical models (Solovev). - Woven fabrics. Connection of structural parameters, interlacing factors, covering and cover factors. Geometry of crossing parts (Peirce), limit densities, warp and weft crimp. Structural models of strength and breaking strains by ideal (non extensible, non cross-deformable) yarns, possibilities of generalizations (Kemp). - Knitted fabrics. Connection of structural parameters, row- and column-densities, length of loops, covering, ratio . Geometrical model of loop, model solving of covering. Structural models of strength and breaking strains by ideal (non extensible, non cross-deformable) yarns, possibilities of generalizations.

Learning activities and teaching methods
Self-study (text study, reading, problematic tasks, practical tasks, experiments, research, written assignments), Independent creative and artistic activities, Individual consultation, Seminár
Learning outcomes
The subject is oriented to mathematical (deterministic and/or stochastic) modeling of basic structural relations in fiber assemblies and to following effects in their mechanical behaviors.
The student will acquire detailed knowledge of the subject in the area according to the approval of the Branch Board

Assessment methods and criteria
Oral exam

oral examination before a committee appointed by the Dean. Written work in the recommended range of 20 pages.
Recommended literature
  • BEHERA, B.K., HARI, P.K. Woven textile structure. Theory and applications. Woodhead Publishing Limited and CRC Press LLC, 2010.
  • HEARLE, J.W.S., GROSBERG, P., BACKER, S. Structural Mechanics of Fibers, Yarns, And Fabrics. New York: John Wiley & Sons,, 1969. ISBN 0471366692.
  • KŘEMENÁKOVÁ, D., MERTOVÁ, I., KOLČAVOVÁ SIRKOVÁ, B. Computer aided textile design 'LibTex'. Indian Journal of Fiber & Textile Research, Vol. 33, December 2008.
  • KŘEMENÁKOVÁ, D., MILITKÝ, J. Comparisson of cotton yarn strength prediction Method, chap. 10, in Textiles for sustainable developments. 2007. ISBN 9781600215599.
  • LORD, P., R. Handbook of yarn production. Technology and Science and Economics.. The Textile Institute. Woodhead Publishing Limited Cambridge. England, 2003. ISBN 9781855736962.
  • LORD, P., R. Spinning. Woodhead publishing Limited Cambridge. England, 2004. ISBN 9781855739772.
  • MORTON, W.E., HEARLE, J.W.S. Physical properties of textile fibers. Heineman, London, 1993. ISBN 9781855735392.
  • NECKÁŘ, B., DAS, D. Theory of Structure and Mechanics Of Fibrous Assemblies. New Delhi, Cambridge, Oxford, Philadelphia: Woodhead Publishing India, 2012. ISBN 9788190800174.
  • NECKÁŘ, B., DAS, D. Theory of Structure And Mechanics Of Yarns.
  • NECKÁŘ, B. Přednášky na TU Liberec [online].. E-learningový portál.
  • NECKÁŘ, B. Příze. Tvorba, struktura, vlastnosti. Praha: SNTL Praha, 1990. ISBN 80-03-00213-3.
  • PAN, N. Analysis of woven fabric strengths: Prediction of fabric strength under uniaxial and biaxial extensions, Composites Science and Technology 56, pp. 311-327. 1996.
  • PAN, N. Development of a Constitutive Theory for Short - fiber Yarns. PART IV. The Mechanics of Blended Fibrous Structures. Text. Res. J.. 1995.
  • PAN, N. Prediction of Statistical Strengths of Twisted Fiber Structures. J. Mater. Sci. 28, pp. 6107 - 6114. 1993.
  • VEIT, D. et al. Simulation in Textile Technology. Cambridge, Oxford, Philadelphia, New Delhi: Woodhead Publishing, 2012. ISBN 9780857090294.

Study plans that include the course
Faculty Study plan (Version) Category of Branch/Specialization Recommended year of study Recommended semester