Stab-resistant properties of multi-axial warp knitted fabric

This study intends to investigate the stab-resistant properties of multi-axial warp-knitted fabric,and quasi-static stab tests of multi-axial warp-knitted fabric with different specifications were conducted.The influence of structural parameters of multi-axial warp-knitted fabric on the stab resistance was investigated,as well as the stab-resistant characteristics of the multi-axial warp-knitted fabric.Besides,the cross section morphologies of the fibers around the fracture rent of the multi-axial warp-knitted fabric were observed via SEM while puncturing,and the mechanism of energy absorption of multi-axial warp-knitted fabric during the stab-resistant process was examined.The results showed that the volume mass of the multi-axial warp-knitted fabric was positively related to the maximum penetration force,which increased as the volume fraction increased.Increasing the surface density of the multi-axial warp-knitted fabric increases the stab resistance of the fabric.The four-axial warp-knitted fabric made of finer yarns will have the best stab resistance,which can better absorb the penetration energy and resist the shearing of blades.