Fabric drape

Drape. Drape is closely related to fabric hand. Whereas hand is based on tactile criteria, drape refers more to a fabric s appearance by its tendency to fall into graceful, three-dimensional folds. Fabric drape depends to a laige degree on the same properties that influence hand, ie, flexural rigidity, thickness, and compressibility. Although stiffness is normally measured in a single direction, drape implies bending in all directions. 

Unique concentrated liquid self-finish. Used as the major softening component in pre-cure and post-cure permanent press processing. Provides full-bodied softness with surface slickness and luster. Effectively reduces "boardiness" on post-cured fabric. Improves fabric drape and surface touch after calendering wash/wear and pre-cure fabrics. 

When asked about the technological readiness of digital fabric libraries with fabric parameters to simulate tme-to-life fabric drape simulations, Fralix explained that, as product developers have a good idea about how most fabrics that have been around for some time behave when you wear them, one can make fit decisions quite accurately. However, if it is a new fabric, many tests need to be done, and the test information needs to be incorporated into the libraries before that fabric can realistically be digitally draped for virtual prototyping (Fralix, August 20, 2014, pers. comm.). 

D shell structures Filament winding Press-forming Fabric draping... 

Laminates, essentially 2D manually intensive lay-up weak through thickness. Press-forming and fabric draping limited deformability. 

Nonwoven fabric drape and drape coefficient are characterised using similar methods, including Nonwovens Cusick Drape (ie, NWSP 090.4.R0 (15) and ISO 9073-9 2008) and Evaluation of Drapeability Including Drape Coefficient of Nonwoven Fabrics (NWSP 090.6.R0 (15) and ISO 9073-9 2008). 

Woven—electrical insulation, fabrics (drapes, clothing), screening, battery separator mats, fiber-reinforced composites... 

In this method, the PCMs are permanently locked within the fibers, the fiber is processed with no need for variations in yam spuming, fabric knitting or dyeing and properties of fabrics (drape, softness, tenacity, etc.) are not altered in comparison with fabrics made from conventional fibers. The... 

Application of ANN, FEAand Empirical Modeling ev Predicting Fabric Drape... 

Practically drape determines apparel design and influences fabric quality for specific end uses. When a fabric is draped it can bend in one or more directions. Usually, curtains and drapes bends in one direction, whereas garments and upholstery exhibit a complex three-dimensional form with double curvature. Hence, fabric drape is a complex mathematical problem involving large deformation under low stresses. [4]... 

Fabric drape is one of the visual components in the aesthetic assessment of fabrics. The drape of a fabric is defined as a description of the deformation of the fabric produced by... 

Application of ANN, FEA and Empirical Modeling in Predicting Fabric Drape 135... 

A three dimensional fabric drape representation was necessary for making appropriate evaluation of drape characteristics quantitatively. To overcome the limitations of two dimensional measurement of stifihess as the estimating parameter of drape, Chu et al. [22] in Fabric Research Laboratories developed the F.R.L Drapemeter and introduced dimensionless drape coefficient as a measure of drape. Later Cusick [23] developed a drapemeter based on similar principles to quantify drape of the fabric. This Cusick Drapemeter became a standard instrument for the drape measurement. 

The schematic diagram of the Cusick Drapemeter is shown in Figure 7.2. Figure 7.3. shows the drape configuration of fabrics on the Drapemeter. This is the apparatus used extensively for the determination of fabric drape. In this instrument, a circular specimen of 36 centimeters in diameter is supported on a circular disk of 18 centimeters in diameter. The imsupported area drapes over the edges of the support disk to form the drape configuration of the fabric specimen. Equation 7.7 is used for the calculation of drape coefficient from instrument. 

Drape of woven fabrics induced by gravitational force is influenced by a combination of certain deformation properties and structural characteristics. Stiffness, shear and extension are the relevant measure of deformation, while fabric weight and thickness are the appropriate structural characteristics. The type of woven construction (for example, plain, matt, twill, satin) is also a factor influencing the drape of woven fabric. Many researchers tried to find out the relationship between the fabric drape behaviors with the fabric mechanical properties. A brief of their findings are discussed below. 

Frydrych et al. [45] examined the relationship between drape eoefficient and mechanical properties of fabric. They found the correlation between the values of drape coefficient, and the values of the mechanical properties influencing formability viz. initial tensile modulus, bending rigidity, on the basis of experiment carried out. It was observed that influence of applied fabric weaves and their weight (W) on the fabric drape was significant, whereas the influence of fabric thickness (T) was not observed. The major mechanical properties influencing fabric drape are initial tensile modulus, shear rigidity and fabric formability. 

Jeong and Philips [46] studied the effects of fabric structure and mechanical properties on the draping characteristics of fabrics. The fabric cover factor has a large impact on fabric drape because of its effect on the bending rigidity. Yam interactions and crimp are determined by weave stmcture, also influences the fabric drape by modifying the shear rigidity. 

Hu and Chan [50] considered the relationship between the fabric drape from the Cusick Drapemeter and sixteen values fi om the Kawabata Fabric Evaluation System. They used foin... 

Many researchers are tried to model the complex behavior of fabric drape using finite element analysis. Drape is a characteristic behavior of flexible fabric, so it is difficult to model fabric. They considered the fabric as different models and modeled accordingly. Some of their findings are discussed below. 

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