Study on the Mechanical Properties of Bionic Protection and Self-Recovery Structures

Abstract

A novel protective structure, based on shrimp chela structure and the shape of odontodactylus scyllarus, has been shown to improve impact resistance and energy absorption. A finite element model of NiTi alloy with shape memory was constructed based on the basic principles of structural bionics. The protective structure utilizes NiTi alloy as the matrix, a material with many advantages including excellent compression energy absorption, reusability after unloading, and long life. The mechanical properties of the single-layer model were obtained by static crushing experiments and numerical simulations. Building upon the idea of the monolayer bionic structure design, a two-layer structure is also conceived. Both single-layer and double-layer structures have excellent compression energy absorption and self-recovery capabilities. Compared with the single-layer structure, the double-layer structure showed larger compression deformation and exhibited better energy absorption capacity. These results have important academic and practical significance for improving the impact resistance of protective armor. Our study makes it possible to repair automatic rebounds under the action of pressure load and improves the endurance and material utilization rate of other protective structures.

Study on Impact Mechanical Properties of Reentrant Bionic Automotive Energy Absorbing Box

“…Also, spider webs, which are over trees several meters high, are at risk of falling or being hit by hard objects, but the web can withstand the impact and wrap the penguin's forehead around these objects, which means spider webs have excellent impact resistance and EA properties. To get bioinspired structures that have excellent functional characteristics of various parts of spider webs, the bioinspired design is implemented by mimicking the various parts of spider webs in this study [17][18][19][20][21]. According to the orderly arc arrangement of spider webs, two bioinspired structures are designed based on the optimal honeycomb and negative Poisson cell: HS, AHS, PS, and APS, as shown in Figure 1.…”

Effect of Nb on the Damping Property and Pseudoelasticity of a Porous Ni-Ti Shape Memory Alloy

“…In particular, the PE of porous Ni-Ti SMAs has shown an important application prospect in the field of high overload resistance related to high-speed launch in recent years [ 14 ]. Guo et al demonstrated that Ni-Ti SMAs have good energy absorption ability and self-recovery capacity under dynamic loading, which can effectively improve the service life and material utilization of protective structures [ 15 ]. However, so far, there have been few studies on the PE property of porous Ni-Ti SMAs.…”

Performance of 3D-Printed Bionic Conch-Like Composite Plate under Low-Velocity Impact

“…Many innovative structures have been inspired by nature, including bio-inspired flexible scaled armor [ 11 ], bio-inspired modular structures [ 12 , 13 ], bionic stab-resistant body armor [ 14 ], and bio-inspired sandwich structures [ 15 , 16 , 17 , 18 ]. For example, inspired by crocodile armor, Guo et al [ 14 ] designed a stab-resistant substrate with a triangular pyramidal structure, and investigated the stab-resistance behavior and dynamic response mechanisms using numerical simulation and experimental testing of a knife impacting the substrate.…”