Multi-scale hierarchical triangular anti-impact system and application thereof

Abstract

The invention belongs to the technical field of anti-impact structures, and discloses a multi-scale hierarchical triangular anti-impact system and application thereof, and the multi-scale hierarchical triangular anti-impact system comprises a plurality of hierarchical periodic units; the hierarchical periodic unit comprises a plurality of macro-scale triangles, mesoscale triangles and micro-scale triangles with different geometric sizes; the macro-scale triangles are periodically arranged, the mesoscale triangles are embedded in the macro-scale triangles, and the three micro-scale triangles are embedded on the outer side of the mesoscale triangle in the middle. According to the invention, a plurality of mesoscopic and microscopic triangles are nested in a macroscopic triangle, and due to the existence of a microstructure, the local rigidity of the structure is enhanced, and the deformation mode of the structure is changed, so that the structure has better compression resistance and dynamic impact energy absorption characteristics. Under high-speed impact, the stress fluctuation value of the multi-scale triangular hierarchical structure is gentle, secondary damage of the protection structure to the protected structure can be effectively reduced, and the protection effect is improved.

Description

Technical field [0001] The present invention belongs to the field of impact-resistant structural technology, in particular to a multi-scale hierarchical triangular impact-resistant system and its applications. Background [0002] At present, impact resistance is a key technical indicator for equipment such as large armored vehicles, ships and aircraft carriers, which is related to their battlefield survivability. By laying a sacrificial layer in the vulnerable area on the outside of the equipment, the plastic deformation and destruction of the sacrificial layer to achieve the absorption of explosive impact energy is a commonly used technical means. Due to the consideration of the overall performance and actual working conditions of large-scale equipment, the design of lightweight and high-strength impact-resistant energy-absorbing structure is of great significance to improve armor protection capabilities and ensure armor safety. [0003] Honeycomb materials have good mechanical ...

AI Technical Summary

Problems solved by technology

The significance of solving the above problems and defects is: under the impact load of the explosion, the insufficient energy absorption characteristics of the protective structure will cause the protected structure to suffer excessive transient loads, which will lead to structural failure

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