Computer Aided Design And Finite Element Analysis Of Ankle-foot Orthosis Based On 3D Printing

The purpose of this study is to combine computer-aided design technology,medical modeling technology and 3D printing technology to complete the design and optimization scheme of ankle-foot orthosis,and to simulate of ankle-foot orthosis by finite element analysis to analyze the mechanical properties.Compared with the traditional fixed ankle-foot orthosis,the ankle-foot orthosis was superior to the traditional one,including flexibility and practicality.Through the finite element analysis of the model,the mechanical properties,including maximum stress,strain and deformation,are analyzed and calculated,and the results are evaluated and the scheme is optimized.The results showed that both the maximum deformation and the maximum stress strain of ankle-foot orthosis were superior to the traditional one.Based on material selection,PLA was selected for the main material of the ankle-foot orthosis,in the area of maximum stress PA12,PEEK and CFRP with better mechanical properties were selected,and compared with PLA the ankle-foot orthosis.The results showed the better mechanical properties by calculated data of ankle-foot orthosis after replacing the maximum stress concentration area with PEEK and CFRP,and the combination of these two kinds of materials greatly improved the mechanical properties of the fixed structure on both sides,and which showed a stable and flexible and practical the ankle-foot orthosis.By fused deposition 3D printing technology,PEEK was used to process ankle foot orthoses fixed on both sides,and further was tested by strain gauges,and the experimental results were consistent with the simulation results of finite element analysis.This study provided a good theoretical basis and reference significance for3 D printing ankle-foot orthosis.