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.
Highlights
The variety and extent of mechanical damage caused by collision emphasizes the need to develop improved armor protection materials with optimized or upgraded design structures
Appendages NiTi of mantis shrimps is relatively complex, we considered universality took advantage alloy strips were used as the structural material to prepare bionic models, andand prepared by appendages oftreatment, mantis shrimps is relatively complex, we as considered universality and took advantage cutting, heat shape training and other methods shown in
As compared with the empirical test, the results show that the simulation was in good agreement with the deformation state of the test at different moments-the location of plastic hinge appeared similar
Summary
The variety and extent of mechanical damage caused by collision emphasizes the need to develop improved armor protection materials with optimized or upgraded design structures. With the development of modern science and engineering technology, new composite materials with excellent mechanical properties such as light weight, high strength, and impact resistance have been invented and have wide application prospects in aerospace, automotive, ships, machinery manufacturing, and many other fields. These composites have high compressive strength and impact toughness [1,2,3,4]. Zhou [1] investigated the penetration of a composite armor of 30CrMnMo
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