Impact mechanical behavior of the bionic multipiece ceramic panel

Abstract

Biological protective structures serve as a reference for the design of contemporary impact protection systems. This study introduces an innovative biomimetic design, inspired by the armadillo's carapace, featuring angled alumina ceramic tiles and interlocking multipiece ceramic panels. Ballistic impact tests, conducted at velocities from 150 to 300 m/s, are utilized to evaluate the impact resistance and mechanical behavior of this design. Furthermore, a five-point displacement field inversion strategy is proposed to determine the damage parameters of the JH-2 model, with supplementary parameters derived through extrapolation from experimental data. Simulations using these parameters revealed the defensive mechanisms of the biomimetic panels. The results highlight that these panels can improve impact resistance at comparable thicknesses. The ceramic's substantial ballistic impedance is complemented by the bionic structure's interlocking boundaries, which efficiently dissipate energy and prevent the propagation of circumferential stresses.