The cell regularity effects on the compressive responses of additively manufactured Voronoi foams

Deformation and failure of additively manufactured Voronoi foams under dynamic compressive loadings

“…Deformation modes of the AM Voronoi foams were also characterised in the aforementioned work, which was found to be strongly influenced by the regularity of the foams but not by loading rates [15]. The fully-regular Kelvin foams showed progressive layered deformation modes whereas the random foams exhibited cell-wall fracture throughout the plateau stage [15]. In modelling the dynamic crushing of Voronoi foams the fracture was shown to be in minor importance [15,17].…”

“…Recently, AM polymeric foams were designed, manufactured, tested and modelled by Duan and his co-workers [3,[14][15][16][17]. The authors used Voronoi tessellation method and Fused Deposition Modeling (FDM) technique to fabricate Voronoi foams from the commercial polylactic acid (PLA).…”

“…open-cell [20] and closed-cell [3] foams) microstructure. They performed quasi-static and split Hopkinson pressure bar tests to study the effect of strain rate [3], man-made defects [14], overall relative density [15], cell regularity [16] and density gradient [17] upon the compressive response and energy absorption. In particular, density gradient -it has been established as a promising design concept to improve the mechanical properties of cellular structures [21] -was introduced to the AM Voronoi foams in which the material properties vary gradually or layer by layer by changing the cell size or the cell-wall thickness.…”

A new modelling method for open cell foam structure based on centroidal and capacity constraint power diagram

“…Voronoi polygons, also known as Thiessen polygons or Dirichlet polygons, can generate polyhedral cell models with random shapes, and are widely used in the simulation modelling of cellular materials. 17,18 It is widely used in the calculation of the mechanical properties of cellular materials in finite element research. Because the shape of the cell in the irregular Voronoi model is random and variable, a regular-shaped sphere or ellipsoid cannot fill the entire cell area well, which will lead to serious defects such as too thick cell wall and too small cell size in the model.…”

Geometric modeling of advanced cellular structures with skeletal graphs

“…Recent advancements in the geometric modeling of stochastic cellular structures have significantly enhanced the capabilities of AM [28,29]. The work by Tang, Dong, and Zhao [30] introduces a hybrid geometric mod-eling method that integrates various approaches to efficiently and flexibly generate cellular structures tailored for desired properties, a crucial aspect in AM.…”