With the deepening of human research on deep space exploration, our research on the soft landing methods of landers has gradually deepened. Adding a buffer and energy-absorbing structure to the leg structure of the la...
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With the deepening of human research on deep space exploration, our research on the soft landing methods of landers has gradually deepened. Adding a buffer and energy-absorbing structure to the leg structure of the lander has become an effective design solution. Based on the energy-absorbing structure of the leg of the interstellar lander, this paper studies the appearance characteristics of the predatory feet of the Odontodactylus scyllarus. The predatory feet of the Odontodactylus scyllarus can not only hit the prey highly when preying, but also can easily withstand the huge counter-impact force. The predatory feet structure of the Odontodactylus scyllarus, like a symmetrical cone, shows excellent rigidity and energy absorption capacity. Inspired by this discovery, we used SLM technology to design and manufacture two nickel-titanium samples, which respectively show high elasticity, shape memory, and get better energy absorption capacity. This research provides an effective way to design and manufacture highmechanical energy-absorbing buffer structures using bionic 3D printing technology and nickel-titanium alloys.
A novel protectivestructure, 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 sha...
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A novel protectivestructure, 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 protectivestructure 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 bionicstructure 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 protectivestructures.
In order to improve the ability of armored military vehicle in modern warfare, protective technique is emphasized by various countries in the world. As the battlefield environment changes, having strong protection abi...
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In order to improve the ability of armored military vehicle in modern warfare, protective technique is emphasized by various countries in the world. As the battlefield environment changes, having strong protection ability is the basic requirement of modern military vehicle. The foot pads of felines have the buffering and energy absorption characteristics, which has inspired the designing of bionicprotective self-repairing structure. The microstructure of the felidae‘s foot pads is negative poisson's ratio *** paper used superelastic properties of NiTi alloy and the mechanical properties of negative poisson's ratio structure to establish the bionicprotective self-repairing model. The compression and restoration characteristics of the model was simulated and analyzed by using LS-DYNA simulation software. The test model was producted by strip NiTi alloy which was conducted comparative analysis in compression experiment. The results show that the simulation analysis can accurately simulate the overall deformation process. Within the range of 1200 N, the model can completely restore its original shape after removed the pressure. The research results which has importantly academic and practical significance to improve the impact resistance of armored military vehicles. It can make the automatic rebound repair to realize under the action of pressure load and improve the endurance and material utilization rate of the total range of armor.
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