Study on low-velocity impact of embedded and co-cured composite damping panels with numerical simulation method

According to the designable mechanical characteristics of composite material, the embedded and co-cured composite damping structure (ECCDS) consisting of fiber reinforced resin layers and one (or more) damping layer(s) embedded into composite material component is manufactured. The finite element model and experiment model of ECCDS are established and low velocity impact performances of the composite damping panels are simulated and tested by using the explicit dynamic analysis software LS-DYNA and the Drop-weight Impact equipment, respectively. The structural behaviors under impact of the damping panels are compared with those of the composite panels without the damping layer. The results of numerical simulation and experiment are in good agreement with each other, which demonstrates that the finite element model and simulation method using present study are valid. Finally the impact properties versus the different geometrical parameters of damping layers are investigated also. The simulation model and method can provide an important foundation for the theoretical predict of impact characteristics of ECCDS.