Study On Deformation Mechanism Of Deep-sea Intelligent Bionic Ionic Polymer-metal Composite

Ocean development and deep-sea exploration have become the focus of research around the world in recent years.A lot of types of marine robots and other deep-sea equipment have been continuously developed in the process of exploration to adapt to the environment of deep-sea exploration.Intelligent software robotic fish has gradually appeared on the deep-sea stage.Ionic polymer-metal composite(IPMC)is a new type of smart material,it is a polymer composite material with specific properties,and an excellent choice for the current multifunctional soft robotic fish material.IPMC has the characteristics of small driving voltage,large deformation,soft structure,strong environmental adaptability,strong affinity,and various functions.The material has obvious nonlinearity.As a new type of smart material,IPMC has a very powerful function as a deep-sea soft body structure,and at the same time,it also stimulates many new functions and new problems under the environment of deep-sea pressure.Therefore,based on the basic beam theory of IPMC research and the experimental research under hydrostatic pressure environment,this paper builds a finite element model of IPMC material under deep-sea pressure environment and conducts numerical simulation analysis of its mechanical properties.The main research work carried out in this paper includes:(1)This paper conducts a review and investigation of IPMC materials based on material composition,physical and mechanical properties,it also conducts a principle study on the existing theories and models of mechanical deformation properties of IPMC materials.The mechanical properties of the material,such as the structural deformation under the factors,lay a theoretical foundation for this paper to study the structural deformation mechanism of the IPMC beam model under excitation.(2)Synthesizing the actuation mechanism of IPMC materials and the basic theory of beam model,this paper constructs three different IPMC finite element models through finite element binding contact simulation interlayer interaction technology,and conducts corresponding material mechanics and structural deformation research.The comparison and analysis with the experimental results show that the double-layer IPMC material structural beam model constructed in this paper has high accuracy in the calculation of structural deformation under different forces.(3)According to the IPMC nonlinear elastic material properties and the equivalent principle of the cantilever beam model,this paper constructs a finite element model of IPMC material structure suitable for deep-sea hydrostatic pressure.And through the comparative study of the single/double-layer equivalent beam model,this paper reveals the deformation characteristics of the beam model structure under the uniform force generated by different voltage excitations,and completes the comparison and verification with the experimental test results.The comparison results verify the rationality and accuracy of the construction and calculation of the finite element beam model based on IPMC material properties.(4)Based on the finite element beam structure model of this paper and the stress-strain curves of IPMC material tension and compression,this paper analyzes and controls the amplitude of the applied distributed force through variable parameter simulation,and develops the IPMC beam model structure under the action of deep sea pressure.Nonlinear numerical simulation analysis and verification of driving structures.The research results show the basic structural deformation characteristics of IPMC structures under the action of deep-sea pressure,thereby revealing the deformation law of IPMC structures under the action of deep-sea hydrostatic pressure.To sum up,the research on the actuation mechanism of IPMC and the construction of the equivalent beam model are carried out in this paper,and the rationality and accuracy of the calculation of the finite element model in this paper are verified by comparing with the experimental test results in different environments.The constructed finite element model carried out research on the structural deformation performance of IPMC materials under the action of deep-sea environmental pressure,and revealed the force and deformation characteristics of the deep-sea bionic fish structure.Therefore,the research in this paper provides a theoretical research reference for the design and control application of deep-sea intelligent structures of IPMC materials.