Advances in laser powder bed fusion (L-PBF) for additive manufacturing (AM) of metals enable the fabrication of highly porous cellular structures in the micrometer range and thus, in principle, coronary stents.
However, process-related irregularities pose a particular challenge, leading to a deviation in morphology and mechanical properties between the actual L-PBF stent and the intended stent (CAD model). Analysis looked in particular at the expansion behavior of the L-PBF stents. To further investigate the effect of these irregularities, a combined experimental and computational framework based on both actual and computationally reconstructed L-PBF stents was used.
"Simpleware ScanIP proved to be an efficient tool for reconstructing detailed L-PBF stent models and thus extending and deepening the knowledge gained from experimental analyses by realistic numerical analyses. In particular, the robust meshing algorithm enabled the generation of high-quality FE meshes that could be immediately used for structural mechanics analyses in the Abaqus FEA software." (Lisa Wiesent, OTH Regensburg)