Experimental determination of fabric shear by yarn pull-out method

The aim of this study was to determine fabric shear by the yarn pull-out method. For this purpose three fabric types were tested. The fabric width/length ratio and the number of pull-out ends were identified as important test parameters. After the yarn in the fabric was pulled from the top ravel region before the start of the crimp extension stage, it was found that fabric shear strength increased as the number of pulled ends increased. On the other hand, when the fabric width/length ratio decreased the fabric shear strength increased. Fabric shear rigidity was also identified for each fabric type and it was found that the number of pulled ends and the fabric width/length ratio influenced fabric shear rigidity. Finally, shear jamming angles were found to be a function of the number of pulled ends. Local fabric shear properties could be identified by pulling the yarn ends in various regions of the fabric. This could be important for the handling of a fabric during its formation. The pull-out method is considered to be a simple way of defining overall and local fabric shear properties for various end-uses.