Analysis of Kevlar49 in-plane and out-of-plane pull out test

The single yarn pullout test is critical for the energy dissipation mechanism research of aramid fabric. This paper conducted both traditional in-plane and out-of-plane tests. The in-plane test utilized digital image correlation (DIC) technique to measure the displacement filed during the pullout process and analyzed the behavior of fabric shear deformation. Three different transverse pre-tension force variables were set for both tests to research the effect of pre-tension force on the pullout load. Comparing the two sets of tests, the results showed that pullout load and fabric energy consumption increased with increasing pre-tension force and the load of out-of-plane pullout was greater under the same experimental conditions. Finally, an explanation was provided for the latter phenomenon.