Influence of Bonding Properties on the Penetration Resistance of UHMWPE Fiber Rigid Laminates

In order to clarify the influence of interfacial bonding properties on the anti-penetration performance of UHMWPE rigid target plates, this study was carried out using a combination of experiments and numerical simulations. In the experiments, 1.1 g wedge-shaped broken pieces were used to conduct multiple penetration tests on UHMWPE laminated target plates with two different adhesives, and the internal damage morphology after penetration was observed by CT scanning technology. In the numerical analysis, a finite element model corresponding to the experimental conditions is established based on LS-DYNA, and different interfacial bond strengths are simulated by changing the bond coefficients, so as to obtain the penetration process, ballistic limit velocity and energy absorption characteristics of the target plate. The results show that the interfacial bonding strength has a significant effect on the anti-invasive performance of the target plate, which shows a trend of increasing and then decreasing. When the bonding coefficient is in the moderate range, the target plate has the highest ballistic limit velocity, the optimal energy absorption efficiency, and the interfacial damage extension is more homogeneous; while too low or too high bonding strength will reduce the anti-penetration capability of the target plate, too low bonding leads to serious delamination damage, and too high bonding leads to local load concentration and accelerated failure. The results of the study can provide an effective reference basis for the structural design and interface optimization of UHMWPE rigid target plates.