3D-printed Wood Plastic Composites Sandwich Structure Performance And Application Research On Furniture Design

The composite sandwich structures have many advantages such as high specific strength,high specific stiffness,low equivalent density,fatigue resistance,etc.It has wide application prospects in aerospace,transportation,automobiles,furniture,and interior decoration.However,the preparation of metal honeycomb,paper honeycomb and other core materials by traditional molding methods has the problems of cumbersome procedures,time-consuming,environmental pollution,poor designability of core material structure,etc.,which is not conducive to the innovative development of the design and manufacture of sandwich structure materials.Compared with traditional manufacturing methods,3D printing(additive manufacturing)technology has the advantages of high efficiency,diversified designs,and integrated molding of complex structures.Among them,the 3D printing equipment with fused deposition modeling(FDM)technology has low cost,a wide variety of raw materials,and a high reputation.Therefore,it can be innovatively applied to the design and manufacture of composite sandwich structure core layers.This pair of 3D printing technology The application of its composite sandwich structure products in furniture product design is of great significance.The main research content of this article is as follows:The "infill pattern" in the 3D printing software is used as the core layer of the sandwich structure,which is divided into two types of two-dimensional and three-dimensional structures.The fused deposition molding process is used instead of the traditional manufacturing method.Using wood flour/poly lactic acid composite wire as raw material,the sample size is designed according to the relevant test standard of sandwich structure,and combined with FDM 3D printer to prepare core structure material,then bonded cardboard to prepare sandwich structure sample,and flat compression performance,Mechanical properties of bending performance and lateral compression performance,to study and analyze the failure mode of wood-plastic sandwich structure under plane compression,three-point bending and lateral compression load.And mechanical properties.Through the mechanical performance test results,the sandwich structure with the best mechanical performance is compared and analyzed,which provides a basis for the effective use of 3D printing technology to apply the wood-plastic composite material sandwich structure to the design and manufacture of furniture.panel.Finally,based on the above research,the design and application of 3D printed sandwich structures for flat parts,connecting parts,curved parts and complex panel parts are studied.The following conclusions are drawn through experimental research.The failure modes of 2D and 3D sandwich structures under plane compression load are divided into initial stage,elastic stage,plastic stage and failure stage.Under bending load,they are mainly divided into elastic deformation and panel start.Under the action of lateral pressure,the stages of wrinkle,core shearing and core breaking are divided into four main stages:elastic deformation,local failure,buckling failure and overall failure stage.In terms of mechanical properties,the two-dimensional cross sandwich structure has the strongest plane compression performance,the three-dimensional concentric 3D sandwich structure has the best bending performance,and the three-dimensional cubic sandwich structure has the most favorable lateral compression strength.Experiments show that the difference in core structure has a great influence on the sandwich structure,and there is the best performance of the sandwich structure.Use 3D printing technology,combined with mechanical performance test results,to design furniture panels and connectors to promote the innovative application and development of 3D printing and its sandwich structure panels in furniture design and manufacturing.