Controllable Instability Of Origami Configuration Space Structure Based On Finite Particle Method

Origami structure has been paid more and more attention by researchers at home and abroad because it can realize complex three-dimensional configuration conversion and has mechanical properties that traditional materials cannot achieve.At present,there are good research results in robot,metamaterial,aerospace,biomedicine and other fields.In this paper,the mechanical properties of Kresling origami structure and Miura origami structure are analyzed based on the finite particle method.The main research contents are as follows:Firstly,we introduce the history and development of origami at home and abroad.Common research methods for origami structure are also introduced.Secondly,the finite particle method(FPM)is applied to the analysis of mechanical properties of origami.First,the basic principle,calculation framework and calculation process of the finite particle method are introduced.Then,The calculation formula of particle displacement and the calculation method of particle mass are introduced.At last,according to the characteristics of rod element,cable element and membrane element,this paper mainly introduces their different internal force calculation ideas and methods.Thirdly,the FPM is used to study the instability mode of spatial structure based on kresling origami configuration.We propose a method of controlling the structural stiffness by adjusting the material,prestress,and structure arrangement.The instability modes of the cable-rod model,the cable-rod-membrane model and the nested model based on the Kresling origami are analyzed.The influences of the elastic modulus,prestress level and structural arrangement on the structural instability mode and strain energy conversion are investigated.At last,the programmable failure of a double-layer Kresling structure is realized by adjusting the Young 's modulus of the structure.Finally,the FPM is used to analyze the instability mode of spatial structure based on Miura origami configuration.We propose a method to control the structural stiffness and instability mode by adjusting the plane angle and spatial folding angle of the structure,and realize the instability mode control of the double-layer Miura model.The feasibility of this method is verified by the comparison between experiment and numerical simulation.In this paper,the finite particle method is used to simulate the origami spatial structure,and the controllable instability of origami spatial structure is realized,which provides a new method for the design of intelligent structurewith controllable destruction.