A two-rod and two-cable tensile metamaterial cell structure with self-loaded internal stress

By introducing a hydrogel-driven self-loading internal stress mechanism into the tensile overall structure, the problem of traditional structures requiring external loading is solved, and the structure is self-stable, self-recovery and self-adaptation are achieved, and the overall stability and durability are improved.

CN119244689BActive Publication Date: 2025-03-25CHANGCHUN UNIV OF TECH
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Patent Information

Application Number
CN202411786373.6
Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Filing Date
2024-12-06
Publication Date
2025-03-25
Estimated Expiration
2044-12-06

AI Technical Summary

Technical Problem

Traditional tensile overall structures require preloading forces to be applied by external loading sources to achieve initial mechanical equilibrium, limiting the structure's self-stability and adaptability.

Method used

A two-bar and two-cord tension metamaterial cell structure with self-loading internal stress is designed. By utilizing the volume expansion characteristics of the hydrogel in a water environment, the self-equilibrium sliding of the T-shaped rod and the compressed elastic component is achieved to complete the self-loading of the internal stress.

Benefits of technology

This structure can realize self-loading of internal stress without external loading, enhance overall stability and durability, overcome the limitations of local stress concentration and single point failure, and achieve a breakthrough from passive load to active response.

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Abstract

The present invention relates to the field of tensegrity metamaterials, and in particular to a two-rod and two-cable tensegrity metamaterial cellular structure with self-loaded internal stress, comprising a rigid shell component, a T-shaped rod, an elastic component, and a hydrogel drive component. The T-shaped rod is driven by the hydrogel to slide along the channel direction of the shell component, and finally reaches self-balance under the joint constraints of the tension elastic component and the tension elastic component. The present invention utilizes the self-stabilizing, self-recovering and self-adaptive mechanical properties of the tensegrity structure to improve the overall stability and durability of the traditional structure, and overcome the limitations of local stress concentration and single-point failure. A method for generating preload stress by the swelling characteristics of hydrogel is proposed, which breaks through the limitation that conventional tensegrity requires external loading and achieves a breakthrough from passive load-bearing to active response. It is suitable for a variety of fields such as smart materials, flexible sensors, deformable structures and underwater detection equipment.
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