Warp-knitted structures are widely used in many fields (medical textiles, household textiles, reinforcement for composites, …) owing to their special geometrical, mechanical, and physical properties. Their unique yet typical mechanical behavior is attributed to loops and underlaps in their structure. Herein, we investigated the relationship between warp-knitted-structure breaking strain and changes in their underlap lengths. We developed an original structural model of closed warp-knitted structures in a highly deformed state. Further, we defined two main stages during the straining of knitted structures. Finally, we verified the variation in the breaking strain of knitted structures with various underlap lengths using the developed model and experimental results.
KurbakA.Models for basic warp knitted fabrics Part I: Chain stitches and their applications on marquisette and weft-inserted warp-knitted fabrics. Text Res J2019;
89(10): 1863–1885. doi:10.1177/0040517518779992
2.
AllisonGL.Warp knitting calculation made easy. Skinner’s Silk Rayon Rec1958;
3: 281–285.
3.
GrosbergP.3—the geometry of warp-knitted fabrics. J Text Inst Trans1960;
51(1): T39–T48.
4.
CookDLGrosbergP.The load-extension properties of warp knitted fabrics. Text Res J1961;
31(7): 636–643.
5.
KawabataSInoueMNiwaM.Theoretical analysis of the non-linear deformation properties of a triaxial weave under biaxial stress fields. Compos Sci Technol1996;
56(3): 261–271.
6.
PostleRMundenDL.24—Analysis of the dry-relaxed knitted-loop configuration: part I: Two-dimensional analysis. J Text Inst1967;
58(8): 329–351.
7.
KurbakA.Models for basic warp knitted fabrics Part II: Single guide bar fabrics (closed-lap and open-lap). Text Res J2019;
89(10): 1886–1916. doi:10.1177/0040517518780001
8.
DabiryanHJeddiARastgooA.Analysis of warp-knitted fabric structure. Part III: theoretical study on initial modulus of warp-knitted fabrics (reverse locknit, three- and four-needle sharkskin). J Text Inst2012;
103(11): 1213–1227. doi:10.1080/00405000.2012.673297
9.
DabiryanHJeddiARastgooA.Analysis of warp-knitted fabric structure. Part II: theoretical study on initial modulus of warp-knitted fabrics (tricot, locknit, and satin). J Text Inst2012;
103(9): 997–1011. doi: 10.1080/00405000.2012.654665
10.
DabiryanHJeddiA.Analysis of warp knitted fabric structure. Part I: a 3D straight line model for warp knitted fabrics. J Text Inst2011;
102(12): 1065–1074. doi:10.1080/00405000.2010.532624
11.
ZhangALiXShaS, et al.
Warp-knitted fabrics simulation using cardinal spline and recursive rotation frame. J Eng Fibers Fabr2017;
12(3). doi:10.1177/155892501701200304
12.
YanagawaYKawabataSKawaiH.Theoretical study on the biaxial tensile properties of warp knitted fabric of single tricot stitch. J Text Mach Soc Japan1970;
16(3): 88–99. doi:10.4188/jte1955.16.88
13.
GaomingJ.Three-dimensional simulation of warp-knitted fabric. Fibres Text East Eur2009;
17(3): 74.
14.
StumpfHLenzTSchulteK, et al.
The mechanical behaviour of single-tricot warp-knitted fabrics Part I: An experimental investigation of knitted fabrics of varying loop geometry under tensile stress with special attention given to inter-yarn friction. J Text Inst1999;
90(2): 209–224. doi: 10.1080/00405009908690623
BuenoMA.4 - Structure and mechanics of knitted fabrics, Editor: P. Schwartz, In Woodhead Publishing Series in Textiles, Structure and Mechanics of Textile Fibre Assemblies, Woodhead Publishing, 2008, Pages 84-115, ISBN 9781845691356, doi:10.1533/9781845695231.84
17.
KonopásekM. O hodnocení deformačních vlastností pletenin. Textil. 1959; 14, p. 14, in Czech
18.
VekassyA. Hurkoló–és konfekciópar. Budapest. 1960, in Hungarian.
NeckarBVysanskaM. Simulation of fibrous structures and yarns. In: Simulation in Textile Technology. Woodhead Publishing, 2012, pp. 222–265.
21.
EN ISO 2062:2009 Textiles –Yarns from packages – Determination of single-end breaking force and elongation at break using constant rate of extension (CRE) tester.
22.
EN ISO 13934-1:2013 Textiles –Tensile properties of fabrics – Part 1: Determination of maximum force and elongation at maximum force using the strip method (ISO 13934-1:2013).
