Quasi -- Static Compression and Compression -- Compression Fatigue
Behavior of Regular and Irregular Cellular Biomaterials
Abstract
The main aim of the current study is to evaluate the compressive
quasi-static and fatigue properties of titanium alloy (Ti6Al4V) cellular
materials, with different topologies, manufactured via Laser Powder Bed
Fusion (LPBF) process. The topologies herein considered are lattice
based regular and irregular configurations of cubic, star and cross
shaped unit cell along with trabecular based topology. The results have
indicated that the effective stiffness of all configurations are in the
range of 0.3 – 20 GPa, which is desirable for implant applications. The
morphological irregularities in the structures induce bending dominated
behavior affecting more the topologies with vertical struts. The S – N
curves normalized with respect to the yield stress indicate that the
behavior of star regular structures is between purely stretching
dominated cubic and purely bending dominated cross based structures.
Trabecular structures have shown desirable quasi-static and fatigue
properties despite the random distribution of struts.