Anisotropic Porolus Structure Modeling For 3D Printing

With the continuous development and progress of computer aided modeling technology,the field of porous structure modeling has attracted more and more attention from researchers.For the good physical properties in specific areas,such as good compressive resistance,lightweight,porous structure has been widely used in our daily life.At the same time,with the continuous development of 3D printing technology,and its advantages in producing complex model,the cost and difficulty of manufacturing complex porous structure are significantly reduced.The current research mainly focused on the isotropic porous structure modeling,whose pore distribution are relatively uniform,and the anisotropic modeling do not get adequate attention.For the functional requirements,objects are often used in a specific physical environment,such as the fixed stress.Therefore,a specific tensor field exists inside the object.For the tensor field reflects both the size and direction characters,we can use the tensor field to guide the generation of the porous structure.And the result porous structure shows better physical properties in specific areas.This paper mainly discusses the modeling of anisotropic porous structure for 3D printing.With a given model and its physical settings,such as stress,we first calculate the stress tensor field inside the model.Then,we generate the porous structure according to the tensor field.Besides,we propose an optimization framework to optimize the pore distribution to achieve the optimal strength-to-weight ratio.In addition,we compared both the isotropic and anisotropic model,the result proved that the anisotropic form gains better strength-to-weight ratio,as well as the better mechanical properties.Finally,we printed the model through a 3D printer and further verified our results through physical experiments.