Bending stiffness of textiles

Navržen byl a vyroben přístroj CLFT určený pro zkoušku ohybové tuhosti textilií metodou převislého vzorku. Zároveň byl pro tuto zkoušku vytvořen viskoelastický model sviskoelastickými vlastnostmi diskretizovanými do kloubů. Byl vytvořen další model určený pro výpočet ohybové tuhosti převislého kruhového vzorku. Byly navrženy a realizovány inovace přístroje TH-5 určeného pro měření ohybové síly. S použitím navrženého přístroje TH-7 byla analyzována anizotropie ohybové tuhosti tkaniny na kruhových vzorcích, byly hledány souvislosti mezi anizotropií ohybové síly tkaniny a její splývavostí a mačkavostí. Byla navržena nová metodika zkoumání dynamického koeficientu splývavosti. The device CLFT was designed for testing bending rigidity of textiles by the method of overhang sample. A ciscoelastic calculation model of bending rigidity was created, where viscoelastic properties were concentrated to joints. There was created another model for calculation of bending rigidity of the overhang half-circular sample. There were designed and carried out innovations of device TH-5 which is used for measuring bending rigidity. The anisotrophy of bending rigidity of fabrics on circular samples was analyzed. Relations between anisotrophy of bending rigidity and draping as well as creasing of fabrics were looked for. A new method for examining the dynamic coefficient of drape ability was designe

Investigation of Loss of Shape Stability in Textile Laminates Using the Buckling Method

Car buyers today are very demanding customers and pay great attention to the quality of purchased goods. They are interested in the quality of the interior as well, for example, the car seats. To avoid customer complaints, the manufacturer needs a sophisticated product testing method that detects any undesirable appearance defects in the textile laminate used for the production of seats in time. The aim of the research was to replace the manual test device used until now with a new methodology for evaluating the appearance defects of textile laminates. The theoretical basis of the methodology for evaluating wrinkled fabric using the well-known buckling theory is described. A newly developed device is introduced. The principle of the new measurement methodology has been patented

How we can use multivariate statistical analysis to predict creasing of fabrics

The creasing of textiles was evaluated by means of the innovative method of measuring the angle of recovery. Our aim is to find statistically significant features contributing to the determination of creasing materials. For this purpose, to identify the inner structures of data, the method of PCA analysis was used a method with latent variables. By means of PCA analysis (method of principal components) the original nine characteristics can be reduced to two latent variables, i.e. principal components. The structure and links among the examined features are characterized by methods like: Scree Plot, Score and component loading, Scatrerplot and Dendrogram. © (2014) Trans Tech Publications, Switzerland

How We Can Use Multivariate Statistical Analysis to Predict Creasing of Fabrics

The creasing of textiles was evaluated by means of the innovative method of measuring the angle of recovery. Our aim is to find statistically significant features contributing to the determination of creasing materials. For this purpose, to identify the inner structures of data, the method of PCA analysis was used a method with latent variables. By means of PCA analysis (method of principal components) the original nine characteristics can be reduced to two latent variables, i.e. principal components. The structure and links among the examined features are characterized by methods like: Scree Plot, Score and component loading, Scatrerplot and Dendrogram. © (2014) Trans Tech Publications, Switzerland