Initial damage and influence of material properties on the puncture response of the Aramid yarn-reinforced epoxy composite

Abstract

In the present study, the Aramid yarn and the epoxy resin were used to produce the composite material. The influence of the internal parameters of the material on its anti-stab performance at initial damage was investigated by a combination of practical experimentation and simulation. In the simulation part, a 1:1 material model was established by finite element software. On the basis of a previous experiment, the interface between the yarn and the resin was optimized to ensure that the simulation results matched the actual experimental results as closely as possible. Using the optimized model, the variation rule of the anti-stab performance of the material was studied by adjusting its parameters. The variation parameters comprised the ratio of the axial and radial elastic modulus of the yarn (EL/ET), the ratio of the tensile strength of the yarn to the shear strength of the resin (σF/σR), and the diameter of the yarn (RF). The experiments revealed that as the EL/ET ratio increased the stab-proof performance of the material deteriorated. The stab-proof performance of the material improved as the EL or the diameter of the yarn increased, but deteriorated as the σF/σR ratio increased.