Numerical Analysis on Stability of Cylindrical Structures in 3D Printing Process (2022-09)¶

This article investigated the elastic buckling of a vertical wall with a cylindric section, considering inhomogeneous self-weight and heterogeneous stiffness due to the curing of the material, to provide a mechanical model for cylindrical structure during 3D printing. The structure is modeled as either a column or a shell, resulting in the global and local buckling length. The numerical results show that the dimensionless buckling length can be determined by the dimensionless curing rate and radius of the cylinder. In addition, the appropriate assumptions to model the mechanical behavior of a printed object are discussed. In a case study, the transition of the buckling mode of a cylinder with increasing radius is illustrated.