Double-waveform negative Poisson's ratio structure based on dielectric electroactive polymer

Abstract

The invention discloses a double-waveform negative Poisson's ratio structure based on a dielectric electroactive polymer, and the structure consists of a double-waveform negative Poisson's ratio cell array. The cell array consists of waveform muscle tendons (101-105) and bones (106-110). Each muscle tendon is made of the dielectric electroactive polymer, and is of a sandwich board structure which is made of a dielectric elastomer, wherein two sides of the sandwich board structure are respectively provided with a flexible electrode. The Young modulus of the bones is greater than the Young modulus of the tendons. The flexible electrodes on the upper and lower surfaces of the tendons are respectively connected with the positive and negative electrodes of a high-voltage DC power supply 111, and the voltage and on and open-circuit states can be adjusted. The double-waveform negative Poisson's ratio cells are arranged in an array, thereby forming a double-waveform negative Poisson's ratio structure. Because the mechanical state and static state of the dielectric electroactive polymer are coupled mutually, the structure can achieve the mutual transformation between the mechanical energy and electric energy, and achieves the real-time transformation, actuation, energy recycling and sensing.

Description

technical field [0001] The invention relates to a double-wave-shaped negative Poisson's ratio structure, in particular to a double-wave-shaped negative Poisson's ratio structure based on a dielectric type electroactive polymer. Background technique [0002] The Negative Poisson's Ratio (NPR) structure is a new type of structure with unique mechanical properties. When it is compressed, it will shrink laterally instead of expanding laterally, so the material will automatically concentrate on the loading site to be more effective. The stiffness of the structure will also increase non-linearly with the increase of the load, so the negative Poisson's ratio structure can make full use of the mechanical properties of the material. The mechanical properties of the negative Poisson’s ratio structure are closely related to the mechanical properties and structural parameters of the materials used. After certain material and parameter design, the negative Poisson’s ratio structure can h...

AI Technical Summary

Problems solved by technology

Electroactive polymers can be mainly divided into two categories: ionic type and electric field type: ionic type electroactive polymers use chemical energy as a transition to realize the conversion between electrical energy and mechanical energy, and their advantages are low driving voltage and large deformation, but the response Slow and low energy density, so difficult to apply to energy absorbing parts under dynamic conditions

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