Yordan Kyosev

Yordan Kyosev
Technische Universität Dresden | TUD · Institut für Textilmaschinen und Textile Hochleistungswerkstofftechnik

Prof. Dr.-Ing. habil.

About

225
Publications
47,267
Reads
How we measure 'reads'
A 'read' is counted each time someone views a publication summary (such as the title, abstract, and list of authors), clicks on a figure, or views or downloads the full-text. Learn more
937
Citations
Citations since 2016
122 Research Items
703 Citations
2016201720182019202020212022020406080100120140
2016201720182019202020212022020406080100120140
2016201720182019202020212022020406080100120140
2016201720182019202020212022020406080100120140
Additional affiliations
August 2019 - present
Technische Universität Dresden
Position
  • Professor (Full)
Description
  • Head of the Chair for Assembly Technology for Textile Products
September 2006 - July 2019
University Hochschule Niederrhein
Position
  • Professor
Description
  • Professor for Textile Technology, Textile Materials and Qualtity Management. Key Areas: Braiding and Narrow weaving technology, 3D Modelling of textile structrures
August 2005 - August 2006
RWTH Aachen University
Position
  • Guest Researcher, Alexander von Humboldt Research Fellowship
Education
September 1998 - February 2002
Technical University of Sofia
Field of study
  • Applied Mathematics and Informatics
September 1997 - October 2002
Technical University of Sofia
Field of study
  • Textile Machinaries
September 1991 - June 1996
Technical University of Sofia
Field of study
  • Textile Technology

Publications

Publications (225)
Article
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 cr...
Article
Full-text available
Three-dimensional (3D) printing has attracted a great deal of attention in recent years in many application fields, for example in the aerospace, construction, industries, art, education, protection, security and medical fields. Some of these application fields of 3D prints depend on the adhesion of imprint polymers on textiles. Adhesion is the ten...
Conference Paper
This paper presents a short survey about the situation and amount of deaf people and the way they communicate. During the motion of the hands, deaf people require significantly more freedom in their clothing compared to the people, which can hear the voice and do not have to describe their words with hands. Typical gesture movements are scanned wit...
Article
Full-text available
Protective clothing, worn for example by police, ambulance and private security services, has the task of protecting against weapon attacks and is becoming increasingly important. International standards specify test methods to ensure the protective effects and classes, but the protective surfaces or the wearing comfort are not defined more detaile...
Article
Full-text available
For a holistic assessment of the interaction between the human body and tight fitted clothing, it is necessary to consider the mechanical properties of the body. Default avatars in CAD software are usually solid and do not take this interaction into account. For this purpose, a solid avatar is converted to a deformable one by using the soft body ph...
Article
Full-text available
To simulate a warp-knitted product with a specific shape, a mesh-based model for modeling and simulation is proposed. The three-dimensional geometry of the final fabric is represented as a set of polygons, each of them containing information about the 3D orientation of the yarns in the warp knitted structure. Using spatial mapping, stitch coordinat...
Article
Full-text available
New digital technologies, the internet age, and ever-increasing customer expectations are changing industries worldwide. Companies in the apparel industry must digitally transform to remain competitive. Traditional approaches will no longer work in the face of change because digital transformation is inevitable, irreversible, enormously fast, and u...
Article
Full-text available
Three-dimensional (3D) printing has been attracting a great deal of attention in recent years in many application fields, for example, in the aerospace, construction, industry, art, education, protection, security, and medical fields. Printing methods, materials, and parameters influence the performance quality and determine the application sector...
Conference Paper
This work presents a new development of stab protection equipment with the use of a special 3D printing process. Investigations were carried out with regard to material selection, geometry design and the influence of the textile layer. Different material combinations of filament and imprinted continuous fiber reinforcements and their influencing pa...
Article
This paper presents one efficient and accurate EMI shielding performance simulation method for metal particles coated with nonwoven textile-based material with the optimized textile module using the finite element method (FEM) based on the waveguide model. Copper particles coated polyester nonwoven materials with three contents of copper were made...
Article
Ultrasonic welding is a universal, clean, and secure alternative joining method. Alternative joining technologies are used increasingly to fulfill specific functional requirements of the seam, such as fluid impermeability to achieve positive bonding during the assembly of technical textiles. In this research, the effect of important ultrasonic weld...
Presentation
Die additive Fused Filament Fabrication (FFF)-Technologie wird im Rahmen der Untersuchung eingesetzt, um eine innovative Stichschutzkleidung zu entwickeln, die Funktionalität (hohe Schutzwirkung) und Tragekomfort vereint. Rahmenbedingungen des 3D-Druckverfahrens zur Herstellung einer Stichschutzoberfläche, die einen optimalen und flexiblen Schutz b...
Article
Full-text available
A study of polyvinylchloride-coated woven polyester fabric welding potential was conducted using continuous ultrasonic welding machines. The effect of cooling air, anvil wheel status, anvil wheel width, material surface contact, and welding gap on seam strength was studied. Three main welding parameters with different levels were selected based on...
Presentation
The study focuses on the material investigation of filaments and imprinted continuous fiber reinforcement for the additive manufacturing of protective surfaces. The protective surfaces are tested according to the K1 class of the German VPAM standard. The results show that a knife attack can be defended against by using suitable material combination...
Conference Paper
Full-text available
Non-woven fabrics are widely used in technical textiles applications and functional clothing. The geometrical model of non-woven structures for special clothing is the significant start point for simulating their properties. This paper demonstrates the application of the statistical fiber-based geometrical method, which can be used to build the non...
Article
Full-text available
Many textile products are using materials with higher thickness like foams, spacer fabrics and nonwoven materials in order to provide comfortable softness of the contact surface to the body. Such materials are often joint to another external layer who have to provide optical and mechanical stability of the system, and are joined together into a 3-d...
Conference Paper
During the sewing process, needle increases its temperature as result of the friction with the sewing yarn and with the fabrics. At some speeds and for some materials critical temperatures can be reached and become a source for problems affecting the quality of the sewn product and the productivity of the sewing machine. This review presents the cu...
Conference Paper
Bending rigidity of the textile materials determines the textile fabric handle and drape and affects the handling process during the assembly of the clothing. This paper gives overview about the state of the art in the literature regarding the testing of the bending rigidity, its influence from the pattern and material type and from the availabilit...
Chapter
This chapter presents a practical method for development of the weaving pattern for tapes with complex cross section. The method is based on analysis and reproduction of the weaving process and can be learned and applied for development of woven tapes even if developer has less knowledge of the classical methods of the woven pattern development. Th...
Article
Using a lapped seam, PVC-coated hybrid textiles with uniform thickness were bonded by continuous ultrasonic welding and conventional joining method with the help of hot air tape welding technique for weather protection purposes. Three fundamental sewing parameters at two distinct levels and three primary welding parameters at three levels based on...
Article
Full-text available
This paper presents preliminary experimental results on the influence on the aerodynamic drag of a cylinder from the cylinder type (i.e., rigid or soft) and its textile surface. Both a rigid cylinder and a soft-body cylinder, with a gelatin layer, each with five different textile surfaces were measured in the wind tunnel using force measurement tec...
Presentation
This works presents new development of the new generation of stab protection equipment. Here investigations were carried out with regard to material selection, geometry design and the influence of the textile layer. For this purpose, test samples were developed using 3D CAD software and printed with a special FDM technique (fused deposition modelin...
Article
Full-text available
This paper examines the influence of different fabric types and material properties on the visual appearance of three types of skirt styles using numerical simulation. The purpose of the simulation is to present and analyze the appearance of virtual garments, create the best-fitting pattern pieces, and choose the appropriate fabric type based on th...
Article
Full-text available
The simulative development of clothing and other textile products requires a complete set of material parameters to be provided. Currently, different simulation software providers users with different values and formats for these parameters. This paper provides an overview about the most important values and proposed structures for storing both the...
Article
Full-text available
The air gaps underneath clothing have a great influence on the thermal regulation of the human body. The distribution of the air gaps depends on the shape of the human body as well as on clothing style, fit, and deformation properties. This paper reports on the influence of clothing fit on thermophysiological parameters of the human body through th...
Article
Metallic stents have been largely used over the last decades to treat vascular diseases like coronary artery or peripheral vessel stenosis. Although they remain the gold standard for vascular treatment, they are subjected to in‐vivo complications such as corrosion, structural failure, fractures, and re‐stenosis due especially to the material which...
Poster
At a pedagogical and organizational level digital technologies have had an exponential use, generating expectations of an education transformation involving the physical space and the ways to interact and deliver educational content. But these expectations are not fully met [1]. During the COVID time, the Chair of Development and Assembling Technol...
Article
Full-text available
In this study, an algebraic model and its experimental verification was carried out to investigate the effect of moisture content on the heat loss that takes place due to conduction of sock fabrics. The results show that increasing moisture content in the studied socks caused a significant increase in their conductive heat loss. Plain knitted socks...
Article
Full-text available
A stab resistant vest is a reinforced piece of body armour designed to resist knife or needle attacks of different energy levels specifically to the upper part of the body (chest and abdomen) to save lives. The majority of armours limit several comfort parameters, such as free locomotion, respiration, flexibility and light weight, which determine e...
Article
Full-text available
The pattern changes on the 3D rotary braiding machines (maypole principle with horn gears with full and empty slots) require complex planning of the carrier positions and timing and allow for production of bifurcated and other complex braids with variable cross sections for medical and technical applications. Another common application of pattern c...
Article
Full-text available
The Covid-19 pandemic has had a major impact on higher education across the world. In this paper we consider how textile education has been impacted and what approaches have been employed to maintain quality education and laboratory experience when traditional methods are not appropriate. This paper considers three different countries – United Stat...
Article
Full-text available
Stab-protective clothing is the most important component of safety equipment and it helps to save the lives of its wearers; therefore, it is designed to resist knife, nail, or needle attacks, especially to the upper body. In this paper, the essential requirements for stab-resistant armor are investigated based on an in-depth review of previous rese...
Article
In the research project presented in this paper, the effects of welding width, pressure force, power, and speed of ultrasonic welding parameters on hydrostatic pressure resistance were examined. A flexible and lightweight PVC-coated hybrid textile material with uniform thickness was used for weather protection purposes. Three main welding parameter...
Chapter
This chapter provides an overview of the different approaches for constructing the geometry of textiles at mesoscale level. Particular attention is paid to the topology-based methods, where 3D sketch of the fabrics is created based on information from contact points between the yarns. Several examples for woven, braided, and knitted structures are...
Article
Full-text available
One of the key lessons learned during the pandemic of COVID-19 is that the digital education and adaptation of Information and Communication Technologies (ICT) should not be viewed as an island on its own but should be considered as an integral part of all education and training. The ICT-TEX project is an EU-funded project which aims to integrate I...
Article
Full-text available
The purpose of this study is to investigate pregnant women’s maternity dress in relation to their body image at each stage of pregnancy. Firstly, in order to create pregnant body Blender software is used. Then Lectra ModarisV8R2 allows to create a pattern. Finally, Lectra 3D Fit simulate and visualize projects. The paper explains, how to gain pregn...
Article
Full-text available
Braided structures are widely used in numerous contexts including everyday practice. In most cases, rope ends are knotted to form various types of loops or tie them to rigid body parts; however, knots take up space that may not be available in some application scenarios, thus making them unsuitable for certain purposes. Hence, this paper introduces...
Article
Full-text available
The application of additive manufacturing, well known as 3D printing, in textile industry is not more totally new. It allows is giving significant increase of the product variety, production stages reduction, widens the application areas of textiles, customization of design and properties of products according to the type of applications requiremen...
Chapter
The woven structures are significantly more and deeper investigated than all other textile structures. This chapter gives short overview about the topological, geometrical and mechanical models of woven structures for the sake of completeness of this work. Still, some important issues related to the coding of woven structures are discoussed.
Chapter
This chapter presents the modelling and programming issues about the storage of the structures on computer. After analysis of the textiles it is found, that two basic types of objects are required—virtual fibers and group of fibers. As the group of fibers can contain recursivelly another groups of fibers, it can be used for representation of the co...
Chapter
This chapter presents the fundamental approach of the description of the yarn paths in weft and warp knitted structures using selected key points. For most of the common structural elements, rules for calculation of the coordinates of their key points are defined, depending on the size of the loop, yarn and depending on the neighbor elements. Some...
Chapter
The textile yarns are often modelled as tubes for simplicity, but in the reality the yarns have their internal fiber based structure. This chapter presents a method for filing the yarn volume with predefined set of filaments, following the yarn axis. The natural twist of the curve is indepenent from the textile related twist, which has to be consid...
Chapter
Larger set of warp knitted structures can be represented as set of knot points (loop heads) and linear connected between these. Suitable mechanical representations of these are truss frameworks. This chapter presents the model building, finite element method based calculation rules, implementation, boundary conditions, extension for double needle b...
Chapter
This chapter presents several applications of the results, created with the model of the previous one. Once the idealized geometry of tubular or flat braids is available several of their characteristics can be evaluated. Relation between the elongation and the current braiding angle, diameter and current braiding angle, jamming limits with and with...
Chapter
Sewing stitches are used to connect two or more textile structures. Their modelling is required at the places, where the yarn level model has to contain all elements. This chapter represent the topological rules for modelling the main types of stitches. Considerations about the number of keypoints and the type of the interpolation of the curve betw...
Chapter
This first chapter of the book introduces the different types of yarn based textile structures and gives short overview about the main works related to their modelling. The main modelling strategies for textiles are discussed and the difference between the topology, geometry, and mechanics based models is given. Finally, the structure of the book i...
Chapter
The cloths and other ready to use products are normally represented as 2D objects. For thier modelling are used shell or plate elements, which elastic behaviour has to be identified bevore the modelling. The yarn level is seldom modelled until now for the ready structures, but with the increasing computational power this will become possible. This...
Chapter
The geometry of the tubular and flat braided structures is predictable using parametrical relations between the carrier arrangement, machine configuration and some yarn parameters. This chapter presents generalized topological algorithm for calculation of the interlacing points of tubular and flat braids with arbitrary floating length and yarns in...
Chapter
This chapter presents algorithms for the topological modelling of braids with complex cross sections. These can support the development of the machine configurations, needed for the braiding process of profiles with an arbitrary cross section form, using the may pole braiding technique. The composite profiles, made from carbon, glass or natural fib...
Chapter
The topological methods, described in the previous chapters, can be used for representation of an idealized geometry of the textile structures. In order the relaxed state of these structures to be achieved, mechanical compuations has to be performed. This chapter presents few mechanical methods, developed by the author and applied for calculation o...
Chapter
This chapter represent applications of the topologically generated geometries of textile structures as initial geometry for FEM computations, performed by the author or his students. Reported are examples of knitted structures with HyperWorks and LS-Dyna and braided structures with Impact-FEM and VTMS. Examples of homogenisation of textile reinforc...
Book
This book presents the textile-, mathematical and mechanical background for the modelling of fiber based structures such as yarns, braided and knitted textiles. The hierarchical scales of these textiles and the structural elements at the different levels are analysed and the methods for their modelling are presented. The author reports about proble...