Research And Optimization Of Isotropic And Load-bearing Properties Of Fused Deposition Modeling Parts

The characteristics of printing technology of FDM(fused deposition modeling)technology make it have the biggest advantage of tool for families,schools and research institutes,like 2D printers.In particular,when the mechanical model is made,the integrity and stress state of the structure can be ensured by one-time molding,avoiding unnecessary bonding or equipment,and reducing the experimental error.FDM printing technology should become the best tool for static model experiments.However,there are three problems in FDM printing technology in practical application and research.Firstly,the FDM printing parts have the behaviour of non-isotropic performance.Thus,to overcome the non-isotropic performance is the key to successful application of statics model experiment.Secondly,research methods on the relationship of printing parameters and mechanical properties of FDM printing parts or materials,are not comprehensive,inconsistent and unclear.Thirdly,there is an error in the prediction of the results when the Poisson's ratio of the 3D printing model is different from the prototype.Therefore,to solve Poisson's ratio of one of the similar constants is also one of the difficulties of 3D printing technology as a convenient tool for statics model experiment.Hence the effect of the FDM printing parameter on the isotropy of the FDM parts is studied,which adopts the method of combining experimental design with mathematical statistics and programming based on the elastic modulus after theoretical analysis.Subsequently the optimal printing parameters are given to obtain the optimal isotropic entity.For other mechanical applications,the concept of the slicing layer and the direction angle of the load are proposed,firstly.Later,On the basis of tensile strength,this paper researches the influence of the printing parameters in the full dimension of three-dimensional space on the mechanical properties of the FDM parts.After 3D printing technology can obtain relatively optimal isotropic material or entity,the application of 3D printing technology to static model experiment can be realized.The concept of correction factorK(_ii=1,234),,is put forward in this paper.The paper adopts method of computer simulation to obtain values ofK(_ii=1234),,,.The research results and methods of this paper not only take the first step of the application of FDM technology to the static model experiment,but also provide a reference for the improvement of FDM technology and the application of other aspects.