Orthotropic energy-absorbing metamaterial, preparation method and application

By using orthogonal anisotropic structure and alternate layered fill polyurethane and epoxy resins in energy-absorbing metamaterials, the problems of single energy absorption mechanism and low energy absorption efficiency of existing energy absorption metamaterials are solved, and more efficient energy absorption and a wider energy absorption range are achieved, reducing process complexity and cost.

CN119708824APending Publication Date: 2025-03-28BEIJING UNIV OF CIVIL ENG & ARCHITECTURE
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Patent Information

Application Number
CN202411986388.7
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2024-12-31
Publication Date
2025-03-28

AI Technical Summary

Technical Problem

The existing energy absorption metamaterial has a single energy absorption mechanism, low energy absorption efficiency, limited energy absorption range, and complex preparation process and high cost, which limits its popularity in large-scale applications.

Method used

The energy-absorbing metamaterial with orthogonal anisotropic structure is composed of an open-cell foam metal matrix and alternately layered polyurethane and epoxy resin. The polymer curing time is reasonably controlled, and the good layering effect between different polymers is achieved.

Benefits of technology

It improves the energy absorption efficiency and energy absorption range of the material, reduces process complexity and cost, and meets the energy absorption characteristics requirements in different directions, and has a wide practical application value.

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Abstract

The invention provides an orthotropic energy-absorbing metamaterial, a preparation method and application, an open-cell foam metal matrix is alternately filled with two polymers of polyurethane and epoxy resin in a layered manner, and good plasticity of a foam metal-polyurethane (AF-PU) material and high strength of a foam metal-epoxy resin (AF-EP) material are combined, so that the orthotropic energy-absorbing metamaterial is obtained. The orthotropic energy-absorbing metamaterial is formed, so that different polymers as well as the polymers and the foam metal matrix are mutually coordinated and improved; under the action of external force, respective energy absorption characteristics of different component materials can be fully exerted, so that a good synergistic effect is formed among the component materials, and the overall energy absorption efficiency of the material is also improved while the energy absorption of the material is further enhanced. Meanwhile, the energy-absorbing metamaterial has orthotropic property, has different energy-absorbing characteristics in different directions, and can more widely meet the requirements on energy-absorbing materials in actual engineering.
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