Geometrical and mechanical modelings of dry relaxed slack plain knitted fabrics for the benefit of technical textile applications part II: Mechanical modeling induced by friction

2016 ◽  
Vol 87 (7) ◽  
pp. 853-864 ◽  
Author(s):  
Arif Kurbak
Keyword(s):  
Mechanical Properties ◽  
Elasticity Theory ◽  
Mechanical Model ◽  
Three Dimensional ◽  
Stable State ◽  
Geometrical Model ◽  
Knitted Fabric ◽  
Mechanical Modeling ◽  
Knitted Fabrics ◽  
Plain Knitted Fabric

In this work, based on the geometrical model given in Part I, a mechanical model is created for dry relaxed slack plain knitted technical fabrics including the three-dimensional friction effects. The equilibrium of forces and moments applied on a loop are written by using the elasticity theory of thin rods. Through this model, it is shown that a dry relaxed plain knitted fabric can be in a stable state induced by friction. The application of the model was carried out on E-glass technical fabric, which was also used in Part I as its dimensional properties were obtained through the created geometrical model. In the current part, Part II, the mechanical properties of this fabric are obtained and discussed as an exemplary application.

Study on Three-Dimension Computer Simulation of Plain Knitted Fabrics

2011 ◽  
Vol 213 ◽  
pp. 595-599 ◽  
Author(s):  
Ying Lin Li ◽  
Su Ying Chen ◽  
Lian He Yang ◽  
Li Hui Cao
Keyword(s):  
Computer Simulation ◽  
Dimensional Space ◽  
Geometric Model ◽  
Three Dimensional ◽  
Knitted Fabric ◽  
Three Dimension ◽  
Knitted Fabrics ◽  
Plain Knitted Fabric ◽  
Knitted Structure ◽  
Shear Condition

How to achieve a realistic computer simulated effect of plain knitted fabric was explored in this article based on analyzing the geometric model of plain knitted fabric loop. In Visual C++ and OpenGL environment, select the circle as cross-section and use cubic B-Spline curve to simulate the yarn path, then the three-dimensional computer simulation of plain knitted fabric is realized in its general condition and it’s shear condition. The simulation results distinctly show the intermeshed loops and transformation effects of knitted structure in three-dimensional space.

scholarly journals Mechanical Properties of Welt Knitted Fabric Reinforced Composites

1995 ◽  
Vol 4 (3) ◽  
pp. 096369359500400 ◽  
Author(s):  
Hiroyuki Hamada ◽  
Asami Nakai ◽  
Akihiro Fujita ◽  
Miyako Inoda
Keyword(s):  
Mechanical Properties ◽  
Tensile Strength ◽  
Tensile Properties ◽  
Fracture Mode ◽  
Knitted Fabric ◽  
Reinforced Composites ◽  
Reinforced Composite ◽  
Plain Knitted Fabric ◽  
Knitted Structure

In this paper, welt knitted fabric reinforced composites were fabricated and its tensile properties were measured. Changing knitted structure from plain knit to welt knit caused changing mechanical properties, particularly isotropic tensile strength could be obtained. The fracture mode of welt knitted fabric reinforced composite was similar that of plain knitted fabric reinforced composite.

Analysis of physical properties and structure design of weft-knitted spacer fabric with high porosity

2016 ◽  
Vol 88 (1) ◽  
pp. 59-68 ◽  
Author(s):  
Chaoyu Chen ◽  
Zhaoqun Du ◽  
Weidong Yu ◽  
Tilak Dias
Keyword(s):  
Three Dimensional ◽  
Middle Layer ◽  
Air Permeability ◽  
Structure Design ◽  
Experimental Results ◽  
Knitted Fabric ◽  
High Porosity ◽  
Compression Properties ◽  
Plain Knitted Fabric ◽  
Spacer Fabric

The main content dealt with in the paper is to present a kind of weft-knitted spacer fabric with high porosity. It is a kind of three-dimensional textile fabric with a sandwich structure that consists of a middle layer of multifilament and two outer layers of plain-knitted fabric. Compared with traditional warp-knitted spacer fabric as cushion mats, weft-knitted spacer fabric is well used as apparel for good softness, thermal/moisture comfort, and air permeability. Therefore, three structures were designed and nine samples were prepared by choosing plain-knitted fabric as the outer layers and selecting soft and thin multifilament as a middle layer. Experimental results show that this kind of weft-knitted spacer fabrics has high porosity, greater than 86%, and also demonstrate that the weft-knitted spacer fabric is suitable for comfortable apparel based on experimental results of air permeability, compression properties, stiffness, and thermal insulation properties.

Mechanical Properties of the Knitted Fabric of SPF/Modal Blended Yarn

2011 ◽  
Vol 322 ◽  
pp. 444-447 ◽  
Author(s):  
Qing Bin Yang ◽  
Yu Kun Dou
Keyword(s):  
Mechanical Properties ◽  
Soybean Protein ◽  
Knitted Fabric ◽  
Knitted Fabrics ◽  
Blended Yarn ◽  
Protein Fibers ◽  
Protein Fiber ◽  
Bending Length ◽  
The Relationship ◽  
Tearing Strength

In order to understand the influence of the blended ratio of the soybean protein fibers to the properties of blended fabrics, five soybean protein fiber/modal blended fabrics are knitted and tested. By the analysis of the results, the relationship between the properties of the blended fabrics and the blended ratio of the soybean protein fibers are obtained. With the increase of the ratio of the soybean protein fibers, the tensile strength and the elongation of the blended fabrics increase and the tearing strength and bursting strength of the fabric decrease. With the increase of the ratio of soybean protein fibers, the softness increases and the bending length, abrasion resistance of the knitted fabrics decrease.

scholarly journals A Study on Damage to PLA Knitted Fabrics During Scouring and Bleaching

2014 ◽  
Vol 16 (3) ◽  
pp. 45-50 ◽  
Author(s):  
Gulzar A. Baig ◽  
Chris M. Carr
Keyword(s):  
Mechanical Properties ◽  
Hydrogen Peroxide ◽  
Sodium Hypochlorite ◽  
Polymer Structure ◽  
Sem Analysis ◽  
Sodium Chlorite ◽  
Knitted Fabric ◽  
Fiber Structure ◽  
Knitted Fabrics ◽  
High Alkali

Abstract Ingeo® PLA (polylactic acid) knitted fabric was scoured through an exhaust technique. The scouring was carried out with sodium carbonate in the presence of a detergent at various concentrations and temperatures. The scoured fabric was bleached with various oxidative bleaching agents. Bleaching was carried out with hydrogen peroxide, sodium chlorite and sodium hypochlorite. Hydrogen peroxide was applied by exhaust and cold pad batch (CPB) techniques. It was observed that during scouring PLA fabric was degraded at high alkali concentrations and processing temperatures. The scouring temperature above 60ºC proved to be deleterious due to the scouring solution penetrating into the polymer structure and damaged the fiber. Sodium chlorite and sodium hypochlorite caused little damage to the mechanical properties of PLA. Hydrogen peroxide when applied by the CPB technique did not reduce strength appreciably but when applied by the exhaust technique decreased the strength significantly. SEM analysis revealed that hydrogen peroxide caused holes and slit formation in the fiber structure.

The Axial Warp-Knitted Fabric and its Reinforced Composite

2011 ◽  
Vol 332-334 ◽  
pp. 837-840
Author(s):  
Yi Hua Bu ◽  
Yan Feng ◽  
Hua Wu Liu
Keyword(s):  
Mechanical Properties ◽  
Woven Fabrics ◽  
Advanced Materials ◽  
Knitted Fabric ◽  
Knitted Fabrics ◽  
Unique Structure ◽  
Reinforced Composite ◽  
And Performance ◽  
Warp Knitted Fabric ◽  
Composite Reinforcement

The structure and performance of the axial warp-knitted composite were introduced, including bi-axial and multi-axial organizations. According to the unique structure of this fabric, the mechanical properties and the advantages as a composite reinforcement were compared with regular staple woven fabrics. The advantages of composites reinforced by bi-axial and multi-axial knitted fabrics were discussed and the applications of such advanced materials were briefly presented.

Effects of Perforation on the Collapsing Strength of Casing

2013 ◽  
Vol 395-396 ◽  
pp. 881-886
Author(s):  
Yu Guang Cao ◽  
Shi Hua Zhang ◽  
Xin Ren
Keyword(s):  
Stress Concentration ◽  
Flat Plate ◽  
Elasticity Theory ◽  
Stress Concentration Factor ◽  
Mechanical Model ◽  
Concentration Factor ◽  
Three Dimensional ◽  
Theoretical Equation ◽  
Fem Model ◽  
Strength Factor

In this study, three-dimensional mechanical model of the perforated casing was simplified as flat plate mechanical model. The theoretical equation for the calculation of collapsing strength factor for a perforated casing under squeeze was derived as per elasticity theory. Three-dimensional FEM model of a perforated casing was built using ANSYS and analysis was performed. The stress concentration factor (SCF) was discussed for perforated casing in this paper and the effects of aperture on SCFs were analyzed in detail.

scholarly journals The Effect of Number and Position of Tuck Stitches within the Pattern Repeat on Air Permeability of Weft-knitted Fabrics from Glass Yarn

2019 ◽  
Vol 2 (3) ◽  
pp. 317-323
Author(s):  
Mehmet Erdem İnce
Keyword(s):  
Mechanical Properties ◽  
High Performance ◽  
Physical And Mechanical Properties ◽  
Air Permeability ◽  
Knitted Fabric ◽  
Knitted Fabrics ◽  
Synthetic Fibers ◽  
Fabric Structure ◽  
Knit Fabrics ◽  
Weft Knitted Fabric

The fact that weft knitted fabrics has a stretchable, 3D, porous and interlocking structure makes them unique when manufactured from high performance fibers. Knitted fabrics with different architectures exhibit different properties. Different loop forms like tuck and skip stitches with various loop lengths reveal different physical and mechanical properties. Literature review indicated that wisely arrangement of tuck stitches within the pattern repeat alter the weft-knitted fabric structure from natural and synthetic fibers. Therefore, we studied the effect of number and location of tuck stiches on air permeability of weft-knitted fabrics from glass yarn. Single-bed, flat weft knitting machine was used to knit fabrics with different architectures from three-ply glass yarn. The nominal single-end count of used E-glass yarn was 136 tex. It is anticipated that the number and location of tuck stitches within knit pattern effect physical and air permeability properties of weft-knitted fabrics from glass yarn.

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