Empirical Analysis of the Impact Strength of Textile Knitted Barrier Meshes

Abstract

The assumptions of instrumental methodology for measuring dynamic loads of knitted barrier meshes were defined. A test stand was built, original in terms of both mechanical construction and electronic measuring system, connected to a computer data analysis system. Maximum values of dynamic forces in the mesh fastening strings were determined. The correctness of the strain gauges construction and measurement data transmission systems was confirmed. Tests of multidirectional resistance to dynamic loads in the mesh fastening strings were carried out. The experiment involved dropping a ball with a mass of 5 kg and a diameter of 10 cm, from a height of 1 m and 2 m onto the mesh surface. The potential impact energy equaled Ep1 = 49.05 J and Ep2 = 98.1 J. The tests showed that the highest force values were observed for meshes with square-shaped a-jour structure, and for mesh with diamond-shaped a-jour geometry the force values were lower. A symmetrical forces distribution was observed in all the strings. The highest forces were recorded in the middle strings and the lowest in the outer ones. The conducted tests confirmed the correctness of the adopted constructional solutions of test stand for identification of dynamic stress distribution in mesh fastening strings. The developed method is a useful verification tool for numerical analysis of mechanical properties of barrier meshes.

3D knitted fabric as an element of footwear for people with diabetic foot syndrome

“…These fabrics have numerous applications, such as the production of mattresses, ballistic shields, water filters, composite preforms, and many others, including medicine and clothing. 30 –32…”

“…These are fabrics with weft stitches, smooth, openwork, plated, and other multi-needle bar structures. 30 –32…”

“…These fabrics have numerous applications, such as the production of mattresses, ballistic shields, water filters, composite preforms, and many others, including medicine and clothing. [30][31][32] The most common type of 3D spacer knitted fabric is a fabric made of three layers, i.e. two outer layers and a middle inner layer.…”

“…These are fabrics with weft stitches, smooth, openwork, plated, and other multi-needle bar structures. [30][31][32] Regarding the material selection for the shoe insoles, it has been assumed that the insole made of a spacer knitted fabric will enable significant reduction of the extreme pressures exerted by the ground on the human foot by evenly distributing the pressure forces on the foot surface in both static and dynamic terms. Four variants of spacer warp-knitted fabrics for shoe insoles were tested in the research program.…”