{"title":"Automation of crochet technology and development of a prototype machine for the production of complex-shaped textiles","date_created":"2024-07-07T11:50:02Z","citation":{"ama":"Storck JL. <i>Automation of Crochet Technology and Development of a Prototype Machine for the Production of Complex-Shaped Textiles</i>. Technische Universität Dresden; 2024. doi:<a href=\"http://dx.doi.org/10.13140/RG.2.2.28243.18729\">http://dx.doi.org/10.13140/RG.2.2.28243.18729</a>","mla":"Storck, Jan Lukas. <i>Automation of Crochet Technology and Development of a Prototype Machine for the Production of Complex-Shaped Textiles</i>. Technische Universität Dresden, 2024, doi:<a href=\"http://dx.doi.org/10.13140/RG.2.2.28243.18729\">http://dx.doi.org/10.13140/RG.2.2.28243.18729</a>.","bibtex":"@book{Storck_2024, title={Automation of crochet technology and development of a prototype machine for the production of complex-shaped textiles}, DOI={<a href=\"http://dx.doi.org/10.13140/RG.2.2.28243.18729\">http://dx.doi.org/10.13140/RG.2.2.28243.18729</a>}, publisher={Technische Universität Dresden}, author={Storck, Jan Lukas}, year={2024} }","chicago":"Storck, Jan Lukas. <i>Automation of Crochet Technology and Development of a Prototype Machine for the Production of Complex-Shaped Textiles</i>. Technische Universität Dresden, 2024. <a href=\"http://dx.doi.org/10.13140/RG.2.2.28243.18729\">http://dx.doi.org/10.13140/RG.2.2.28243.18729</a>.","apa":"Storck, J. L. (2024). <i>Automation of crochet technology and development of a prototype machine for the production of complex-shaped textiles</i>. Technische Universität Dresden. <a href=\"http://dx.doi.org/10.13140/RG.2.2.28243.18729\">http://dx.doi.org/10.13140/RG.2.2.28243.18729</a>","ieee":"J. L. Storck, <i>Automation of crochet technology and development of a prototype machine for the production of complex-shaped textiles</i>. Technische Universität Dresden, 2024.","alphadin":"<span style=\"font-variant:small-caps;\">Storck, Jan Lukas</span>: <i>Automation of crochet technology and development of a prototype machine for the production of complex-shaped textiles</i> : Technische Universität Dresden, 2024","short":"J.L. Storck, Automation of Crochet Technology and Development of a Prototype Machine for the Production of Complex-Shaped Textiles, Technische Universität Dresden, 2024."},"user_id":"220548","_id":"4792","status":"public","file_date_updated":"2024-07-07T11:49:19Z","publication_status":"published","file":[{"date_created":"2024-07-07T11:49:19Z","date_updated":"2024-07-07T11:49:19Z","success":1,"creator":"jstorck","access_level":"open_access","file_id":"4793","content_type":"application/pdf","relation":"main_file","file_name":"Dissertation_Storck.pdf","file_size":25407376}],"year":"2024","has_accepted_license":"1","type":"dissertation","main_file_link":[{"url":"https://tud.qucosa.de/api/qucosa%3A90454/attachment/ATT-0/","open_access":"1"}],"abstract":[{"lang":"eng","text":"In the future, due to the climate crisis and the need to reduce CO2 emissions, an increasing demand for lightweight materials such as textile reinforced composites can be expected. Because of\r\nrising raw material and energy costs, the application of more near net-shaped composites is promising for reducing manufacturing costs and waste. However, conventional textile technologies are limited in their ability to produce the necessary complex-shaped textiles. In order to address this problem by using alternative technologies that have not yet been industrially established, this thesis deals\r\nextensively with the development of a crochet machine and the investigation of respective textiles.\r\nCrochet is a stitch-forming technology in which, unlike knitting, the loops of a stitch originate\r\nboth vertically and horizontally from previously formed stitches. With versatile crochet, it is especially possible to create complex three-dimensional (3D) shapes because new stitches can be formed\r\nat any point on a fabric. Previous crochet machine approaches are inadequate and severely limited\r\nin scalability to an industrially applicable machine. Industrially established machinery called crochet\r\nmachines are misleading in their designation because they are knitting machines that can only\r\nroughly mimic crochet structure but cannot form true crocheted fabrics.\r\nThe Crochet Automaton (CroMat) crochet machine developed and patented here enables for\r\nthe first time the automated production of chain stitches (CHs), slip stitches (SLs), single crochet\r\nstitches (SCs), half double crochet stitches (HDCs), turns (T1 and T2), increase stitches (INCs) as well\r\nas decrease stitches (DECs) and other operations according to the principle of flat crocheting based\r\non a chain line. In addition, by manually removing and re-hanging the produced fabric, new stitches\r\ncan be formed at almost any point to produce complex-shaped 3D textiles according to the capabilities of crochet. For example, it is possible to produce shapes relevant for near net-shaped composites\r\nsuch as double T-beams with the developed CroMat prototype. With manually suspending different\r\nstitch rows or fabrics on the machine, it is also possible to join them by simultaneously crocheting a\r\ncourse through them.\r\nIn addition to the mechatronic prototype with ten axes, the world's first tool for designing machine-crocheted textiles is developed. It includes error checking, generation of the G-code for machine control and a preview of the designed fabrics. Beyond a graphical user interface (GUI) with\r\nstandardized crochet symbols, a higher-level programmability is added through specifying a shape\r\nby 2D polygons and automatically generating corresponding, machine-crochetable patterns.\r\nThe first topology-based modeling framework for machine-producible crochet structures was\r\ndeveloped for the preview. A similar modeling was developed for manually crocheted fabrics, which\r\ndiffer from the machine-produced ones only in the fact that the fabric is turned after each row and\r\nthus the stitches are formed from different sides. Both models can be used as a basis for simulative\r\nfinite element method (FEM) investigations, which were used in this work to simulate crocheted\r\nfabrics for the first time.\r\nFurthermore, the tensile properties of manually crocheted fabrics were systematically investigated for the first time and the properties of the first crochet composites were researched. Crocheted\r\ntextiles (and corresponding composites) have basically similar properties as knitted textiles but have\r\na tendency to withstand higher forces. Together with the shaping capabilities, the CroMat crochet\r\nmachine is generally highly promising for the automation of crochet and especially for the future\r\nproduction of near net-shaped composite reinforcements."}],"date_updated":"2024-07-17T10:13:20Z","language":[{"iso":"eng"}],"publisher":"Technische Universität Dresden","oa":"1","author":[{"full_name":"Storck, Jan Lukas","orcid_put_code_url":"https://api.orcid.org/v2.0/0000-0002-6841-8791/work/163122759","last_name":"Storck","orcid":"0000-0002-6841-8791","first_name":"Jan Lukas","id":"221157"}],"doi":"http://dx.doi.org/10.13140/RG.2.2.28243.18729","urn":"urn:nbn:de:hbz:bi10-47920"}