Tearing and tensile strength behaviour of military khaki fabrics from grey to finished process

Abstract

Purpose -This paper seeks to report an experimental investigation on the tearing and tensile strength behaviour of military khaki fabrics from grey to finished process. Design/methodology/approach -Uses three different types of military fabric (3 up 1 down twill), differing in type of constituent yarns (ring/rotor) in order to test their tearing and testing strength behaviour. Findings -Tearing strength of fabric is found to be very much susceptible to change due to the process variation, while fabric tensile strength is relatively less sensitive. Ring spun yarn fabric shows higher tearing strength compared with rotor spun yarn fabric. However, the difference in their tearing strength reduces substantially as the process approaches towards the finished state. On the other hand, rotor spun yarn fabric exhibits higher tensile strength along the warp. Tearing strength along bias direction is in between warp and weft wise tearing strength; whereas tensile strength is lowest while tested along the bias direction. During the grey to finished process, tear strength falls at bleaching and dyeing, and particularly drops in strength is being more at the dyeing stage. Originality/value -This study has investigated the tearing and tensile strength behaviour of military khaki fabrics from grey to finished state, developing understanding of the impact of different processes on the tearing strength, so that fabric of the required tear strength can be developed with process modification.

Mechanical failure criteria for textiles and textile damage resistance

“…Although there are simple ways to measure such strength, theoretical prediction and modeling remain diffi cult, due to the many variables that contribute to the complicated mechanisms involved in the tearing process (Hamkins and Backer, 1980;Krook and Fox, 1945;Mukhopadhyay et al, 2006;Scelzo et al, 1994aScelzo et al, , 1994bTaylor, 1959;Teixeira et al, 1955;Teutelink et al, 2003;Frydrych, 2004, 2005;Zhong et al, 2004). Examples include the development of a del-zone in a tongue tear test (see Fig.…”

Comparisons of trapezoid tearing behaviors of uncoated and coated woven fabrics from experimental and finite element analysis

“…This research achievement will contribute to the prediction of damage growth and the ability to compare different fabric materials for their damage tolerance. Mukhopadhyay et al (2006) reported an experimental investigation on the tearing and tensile strength of military khaki fabrics from grey to finished process (such as bleaching and dyeing). The results showed that tensile strength is relatively less sensitive while tearing strength dropped significantly during the grey to finished process.…”

A Review on Different Factors of Woven Fabrics’ Strength Prediction

“…The finishing treatment as easy care or coating reduce the tearing strength due to restrict in freedom of movement of the yarns under loading [37]. So, it clear that tearing strength is more dependent of the of the fabric construction [41] …”

“…This failure causes the load being transferred to the adjacent yarn and thus fails in turn. Thought greater extensibility or reduced frictional constraints allow the yarns to bunch at the tear, and therefore increase the tearing strength [40], it is clear that higher yarn strength may not necessarily lead to higher tear strength [41].…”