Researching the relationship between the parameters of the fabric structure and its protective ability when cutting

The research is devoted to the study of the deformation features of protective fabric of various structures during low-speed indenter insertion in the form of a knife and to the establishment of the relationship between the parameters of the fabric structure and the features of its destruction. A fabric based on aramid complex threads of 29.4 tex with a surface density of about 160 g/m2 was selected as the object of the study. As part of the research carried out, the relationship between the pulling force of the threads, the stability when cutting through the fabric and the coefficient of connectivity of the fabric was determined. It is shown that with an increase in the connectivity coefficient, an exponential increase in the effort of pulling the warp and weft threads out of the fabric is observed. It has been revealed that plain weave fabric has the highest protective ability when cutting with a knife. This is due to the monolithic structure of the fabric (maximum values of the interaction force between the warp and weft threads have been achieved), which eliminates the mobility of the threads. At the same time, plain weave fabric demonstrates anisotropic properties in the direction of the warp and weft, which occurs due to the maximum bending of the warp and the minimum bending of the weft. It has been observed that 3/3 twill and irregular satin weave fabrics have the same warp and weft bending, satisfy the condition of equal deformability, and thus possess advantages in the manufacture of protective products.