Computing Stitches and Crocheting Geometry

Çapunaman, Özgüç Bertuğ; Bingöl, Cemal Koray; Gürsoy, Benay

doi:10.1007/978-981-10-5197-5_16

Cited by 8 publications

(15 citation statements)

References 9 publications

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“…In comparison with the topology based approach presented here a more realistic representation of the geometry of the yarn path is achieved by Guo et al, where the model’s suitability for FEM was not examined. 3 On the other hand, Capunaman et al 2 focused on generating instructions for hand crafting of crocheting patterns through a top-down approach based on input geometries and the crafter’s individual crocheting style without modelling the yarn topology of stitches. Especially the latter clearly distinguishes their approach from the topology based modelling at the meso scale.…”

Section: Resultsmentioning

confidence: 99%

“…3 Crochet stitches correspond to a slipknot since the entire textile can unravel as soon as one knot comes loose. 2 The simplest stitches on which more complex ones are based are the chain, slip stitch and single crochet.…”

Section: Introductionmentioning

confidence: 99%

“…In addition to the well-known surface-forming textile processes of weaving and knitting, which are used in numerous technical fields, crochet is known since the 19 th century 1,2 but has received little scientific attention and is not applied in the field of technical textiles. 3 The latter can be attributed to the lack of an automated production process in contrast to the other textile area forming processes.…”

Section: Introductionmentioning

confidence: 99%

“…By assembling the tiles, it is possible to model three-dimensional crochet textiles based on input geometries as well as to generate text instructions according to the international notation of the Craft Yarn Council 21 to hand crochet those. Additionally, Capunaman et al 2 proposed a crochet pattern generation with three-dimensional modelled surfaces as input and by considering the individual crocheting style of the crafter based on measured crocheting swatches.…”

Section: Introductionmentioning

confidence: 99%

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Topology based modelling of crochet structures

Storck

Gerber

Steenbock

et al. 2022

Journal of Industrial Textiles

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Crocheted textiles receive scarce scientific study and are at present not produced in automatized industrial scale. Computer-aided modelling and simulation offer capabilities for investigating possible technical fields of application. In this context a novel approach for modelling crocheted textiles consisting of chains, slip stitches and single crochets using a topology based and parameterized key point representation at the meso scale is proposed. According to the stitch size, yarn diameter and pattern spline interpolated models, which are free of interpenetrations up to approximately a 1/10 ratio of yarn diameter to stitch size, are generated by a developed Python program and software from the company TexMind. The models are suitable for finite element method (FEM) applications with LS-DYNA with which the mechanical properties of crocheted textiles can be studied. Exemplary simulations show anisotropic properties and homogeneous distribution of stresses in a crocheted textile. Due to the computationally simple and flexible modelling the presented approach may serve as a tool for designing planar crocheted textiles. This allows for estimation of the required yarn length and offers the prediction capabilities of simple and fast FEM simulations based on beam elements.

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Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Topology based modelling of crochet structures

Storck

Gerber

Steenbock

et al. 2022

Journal of Industrial Textiles

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“…In a previous study, we have explored the development of a computer algorithm that generates crochet patterns of single 3D objects modeled in CAD software [1]. In this computational framework, the users first crochet a 10-stitches-by-10-rows swatch.…”

Section: Introductionmentioning

confidence: 99%

From Stitches to Digits and Back: Computational Crocheting of Branching Geometries

Çapunaman

Bingöl

Gürsoy

2022

Eskişehir Technical University Journal of Science and Technology a - Applied Sciences and Engineering

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Crocheting is a hands-on craft that involves repetitive manipulation of a single continuous thread with a hook-like tool to generate surfaces and 3D forms. In a previous study, we have presented a parametric model [1] that generates crochet patterns of NURBS surfaces using a 10-stitches-by-10-rows swatch to account for all the physical variables that affect the crocheted object (i.e., yarn thickness, hook size, crafter’s grip). The dimensions of the previously crocheted tension swatches were used as the inputs of the crochet pattern generator algorithm, alongside the desired NURBS geometry, to generate individualized crochet patterns. These crochet patterns are text-based representations, similar to g-code in additive manufacturing, enabling the documentation and communication of the step-by-step hands-on crocheting process. Following these crochet patterns, the users can crochet physical objects with the same dimensions and form as their digitally modeled counterparts. This paper presents the second stage of this research in which we expanded this computational framework to enable crocheting of parametric branching geometries with multiple components by multiple crafters. While the components of the branching geometries can be crocheted by a single user, it is also possible to have different users crochet the components since the tension swatch can capture crafter-specific variables. As a proof-of-concept, a branching structure made of 14 unique components is designed and crocheted by two students of architecture as part of the Advanced Digital Fabrication course at the Pennsylvania State University. The students each crocheted 7 components based on their individual inputs while maintaining the dimensions and form of the digitally designed branching geometry. The findings suggest the possibility of a collective and distributed crocheting platform which can be used to create crocheted artifacts in various scales. This can be considered an alternative way to transition from the digital to the physical without relying on digital fabrication tools.

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