Lightweight Structure Design of 3D Printed Polylactic Acid Materials Based on Topology Optimization
Lightweight structural design could reduce product mass while maintaining mechanical performance,which is of great significance for energy conservation and emission reduction in automobile,high-speed rail,aerospace,and other industries.Polylactic acid(PLA)is widely used in the field of 3D printing due to the advantages of degradability,easy printing,and good mechanical properties.Therefore,in this paper,the degradable material polylactic acid was taken as research object,topology optimization was used as method of lightweight structure design,and fused deposition 3D printing technology was used to explore the influence of parameters(volume fraction and penalty factor)on the total deformation of the workpiece under bending load in the process of topology optimization.The quality of the workpiece before and after topology optimization at different filling rates was compared,and the bending performance of the workpiece at different fused deposition 3D printing speeds after topology optimization was explored.The results show that:(1)when the volume fraction is 40％and penalty factor is 3,the maximum deformation of the model after topology optimization meets the optimization goal;(2)the topology optimization workpiece of 3D printing can achieve 50％mass reduction and maintain high bending force,but the flexural modulus and deformation amount decrease slightly;(3)reduce printing speed has little effect on the mechanical properties of the workpiece with the optimized structure.
万方数据
维普
