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Lecturer(s)
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Neckář Bohuslav, prof. Ing. DrSc.
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Vyšanská Monika, Ing. Ph.D.
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Mertová Iva, Ing. Ph.D.
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Krupincová Gabriela, Ing. Ph.D., Ing.Paed.IGIP
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Course content
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Lectures: 1. Introduction to structural mechanics. Basic terms of mechanics, solid and deformable bodies, principles of continuum and structural mechanics. 2. Fibers and fiber assemblies. Basic quantities and relationships describing fibers and general fiber structures. 3. Fibers and fiber assemblies. Fiber orientation - description of fiber orientation in 3D and in section. 4. Fibers and fiber assemblies. Fiber-to-fiber contacts. Theory of contacts according to C.M. Wyk. 5. Fibers and fiber assemblies- Mechanics of fiber assemblies. Compression of fibrous material. Compression model according to C. M. van Wyka and its empirical correction. 6. Yarns 1. Definition and context. Basic concepts. 7. Yarns 2. Helical model. Geometry. 8. Yarns 3. Helical model. Mechanics of yarn. 9. Multiaxial textiles. Tensile stress in multiaxial textiles. Regular multiaxial textiles. Textiles with continuous fiber distribution. 10. Woven fabrics 1. Fabric geometry. Peirce's model. 11. Woven fabrics 2. Fabric mechanics. Fabric ductility and strength. Non-deformable threads. 12. Woven fabrics 3. Mechanics of fabrics. Elongation and strength of fabrics. Deformable threads. 13. Knitted fabrics 1. Definition. Model of knitted fabric geometry. 14. Knitted fabrics 2. Mechanics of knitted fabrics. Elongation and strength of knitted fabrics. Non-deformable threads and deformable threads. Practices: 1. Fibers and fiber structures. Basic quantities and relationships describing fibers and general fiber structures. 2. Fibers and fiber structures. Fiber orientation. Description of orientation in space and in cross-section. 3. Fibers and fiber structures. Interfiber contacts. Theory of contacts according to C. M. van Wyka. 4. Fibers and fiber structures. Mechanics of fiber structures. Compression of fiber material. Compression model according to C. M. van Wyka and its empirical correction. 5. Yarn 1. Definitions and contexts. Basic concepts. 6. Yarn 2. Helical model. Geometry. 7. Yarn 3. Helical model. Mechanics of yarn. 8. Multiaxial textiles. Tensile stress in multiaxial textiles. Regular multiaxial textiles. Textiles with continuous fiber orientation. 9. Woven fabrics 1. Geometry of woven fabrics. Peirce model. 10. Woven fabrics 2. Mechanics of woven fabrics. Elongation and strength of woven fabrics. Non-deformable yarns. 11. Woven fabrics 3. Mechanics of woven fabrics. Elongation and strength of woven fabrics. Deformable yarns. 12. Knitted fabrics 1. Definition. Model of knitted fabric geometry. 13. Knitted fabrics 2. Mechanics of knitted fabrics. Elongation and strength of knitted fabrics. Non-deformable threads and deformable threads. 14. Final test.
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Learning activities and teaching methods
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Monological explanation (lecture, presentation,briefing), Dialogue metods(conversation,discussion,brainstorming), Lecture, Practicum, Students' self-study
- Class attendance
- 56 hours per semester
- Home preparation for classes
- 40 hours per semester
- Preparation for comprehensive test
- 30 hours per semester
- Preparation for exam
- 45 hours per semester
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Learning outcomes
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Students will be acquainted with quantities and relations which are valid in textile fiber assemblies: fiber blends, fiber bundles, linear fiber assemblies - multifilaments and yarns, and areal textiles - woven and knitted products. Within practices - students rearrange resulting equations from lectures to the suitable physical dimensions, apply it, and so they obtain the image about order of values of quantities. Students obtain also other information about technological relations.
Deeper ability to understand behavior of fiber structures and ability for utilization of their specific properties.
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Prerequisites
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Knowledge of mathematics, mechanics, basic principles of textile structure, and textile technologies within the range of forgoing study program.
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Assessment methods and criteria
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Oral exam
Direct Teaching: Credit: The basis for obtaining credit is the acquisition of a sufficient number of points (at least 60%). Points are awarded on the basis of written questions during the semester. The content and scope of the written work is determined by the topics that are discussed in detail during the lectures. Exam: oral Indirect Teaching: Credit: Correctly calculated all sent examples. Exam: oral on-line.
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Recommended literature
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Soubor českých přednášek na https://elearning.tul.cz/..
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BEHERA, B. K., HARI, P. K., ed. Woven textile structure. Cambridge: Woodhead, 2010. ISBN 978-1-84569-514-9.
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HU, J. Structure and mechanics of woven fabrics. Cambridge: Woodhead Publishing, 2004. ISBN 0-8493-2826-8.
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NECKÁŘ. B., DAS. D. Theory of structure and mechanics of fiber assemblies. New Delhi: Woodhead Publishing India, 2012. ISBN 978-1-84569-791-4.
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NECKÁŘ. B., DAS. D. Theory of structure and mechanics of yarns. New Delhi: Woodhead Publishing India, 2018.
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NECKÁŘ, B. Morfologie a strukturní mechanika obecných vlákenných útvarů.. Liberec: Technická univerzita v Liberci, 1989. ISBN 80-7083-318-1.
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NECKÁŘ, B. Příze. Tvorba, struktura, vlastnosti. Praha: SNTL Praha, 1990. ISBN 80-03-00213-3.
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