Numerical simulation of stab-resistant behavior of warp-knitted spacer fabrics

In view of the mechanical complexity of stabbing,the quasi-static stab tests were conducted to observe the stab-resistant behavior and failure characteristic,and the finite element model was built to simulate the deformation shapes of spacer structure and penetration force change to study the stab-resistant mechanism of warp-knitted spacer fabrics.The results showed that the compression deformation of the spacer layer,stretch and shear deformation of loops occurred simultaneously when the warp knitted spacer fabric being stabbed resisted the stabbing in primary and secondary roles.The values of deformation characteristic and penetration force change obtained by simulative computation are basically in agreement with the experimental results,and it provided some reference for the design of soft stab-resistant products.