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Concave wave-shaped negative Poisson's ratio structure based on dielectric electroactive polymers

An electroactive polymer, negative Poisson's ratio technology, applied in electrostatic motors, generators/motors, electrostatic generators/motors, etc., can solve the problems of slow response, low driving voltage, and difficulty in applying energy-absorbing components, achieving Improve energy absorption, achieve energy conservation and environmental protection, and reduce energy consumption

Inactive Publication Date: 2017-10-20
NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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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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  • Concave wave-shaped negative Poisson's ratio structure based on dielectric electroactive polymers
  • Concave wave-shaped negative Poisson's ratio structure based on dielectric electroactive polymers
  • Concave wave-shaped negative Poisson's ratio structure based on dielectric electroactive polymers

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Embodiment Construction

[0038] In the present invention, the dielectric electroactive polymer is applied to the tendon part of the concave wave-shaped negative Poisson's ratio structure, which can realize the real-time variable of the concave wave-shaped negative Poisson's ratio structure, making it work under different voltages or electric fields It has different mechanical properties under excitation, and can realize the integration, electronization, informationization and intelligence of elastic elements, vibration damping elements, sensor elements, actuator elements and energy recovery elements at the same time.

[0039] The specific embodiments of the present invention will be further described below in conjunction with the accompanying drawings.

[0040] The invention discloses a concave wave-shaped negative Poisson's ratio structure based on a dielectric electroactive polymer, which is formed by a concave wave-shaped negative Poisson's ratio cell array;

[0041] The concave wavy negative Poiss...

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Abstract

The invention discloses a concave wave-shaped negative Poisson's ratio structure based on dielectric electroactive polymers. The structure is formed by a concave wave-shaped negative Poisson's ratio cell array, and the cells consist of wave-shaped tendons (101~105 and 106~110) and bones (111 and 112). The tendons are made of dielectric electroactive polymers, and are of a sandwich board structure, sandwich materials are dielectric elastomers, two sides are flexible electrodes, and the Young's modulus of the bones is larger than that of the tendon materials. The flexible electrodes of upper and lower surfaces of the tendons at upper and lower sides are connected with the positive electrode and the negative electrode of high-voltage direct current power supplies 113 and 114 respectively, and the voltage and path open-circuit state are adjustable. The concave wave-shaped negative Poisson's ratio cells are arrayed, and thus the concave wave-shaped negative Poisson's ratio structure can be formed. Since the mechanical states and electrostatic states of the dielectric electroactive polymers are mutually coupled, mutual conversion between mechanical energy and electric energy can be realized, and functions of structure real-time variability, actuation, energy recovery and sensing of the concave wave-shaped negative Poisson's ratio structure are realized.

Description

technical field [0001] The invention relates to a concave wave-shaped negative Poisson's ratio structure, in particular to a concave wave-shaped negative Poisson's ratio structure based on a dielectric 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 have...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02N1/00F16F15/02G01L1/00
CPCF16F15/02G01L1/00H02N1/00H02N1/002
Inventor 王源隆赵万忠周冠王春燕
Owner NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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