Abstract
Creep is one of the time-dependent mechanical behavior of textile materials, which can effect on the appearance and performance of the fabrics in various applications from garment to technical applications such as tensile structures and geotextiles. In the present study, the effect of fabric structure and loading direction on the creep behavior of two bar warp-knitted fabrics (Tricot, Reverse Locknit, 3 needle Sharkskin, 4 needle Sharkskin and Queen’s cord) have been investigated. According to the results, the fabric structure and loading direction have outstanding influence on the creep of the fabrics. The creep of the fabric in the course direction decreases by increasing the length of underlaps in the back-guide bar, meanwhile increases in the wale direction. Moreover, Tricot and Revers Locknit structures demonstrated more creep in the course direction, whilst sharkskin 3, sharkskin 4 and Queen’s cord structures exhibited higher creep values in the wale direction. Moreover, among considered fabric structures, Reverse Locknit with level of orthotropy near to1, revealed almost isotropic viscoelastic properties.
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