Compressive crushing behavior of open-cell biomaterials

In this paper, the structures constructed and tested byYavari et al [۸] was investigated numerically usingANSYS (for the elastic properties), and LS-DYNA (forthe yielding behavior) finite element codes. In theirwork, rhombic dodecahedron interconnected cells werecreated using SLM method. The results showed thatconsidering irregularity in cross-section of the structurestruts decreases both the yielding stress anddensification strain. Also, both the values obtained forthe irregular structure are closer to the experimentalresults. Another conclusion was that the ذoth the plateaustress and densification strain of the FEM solution arehigher than the experimental values. This can beattributed to lower amount of damage considered in themodeled struts. The results also showed that the plateaustress decreases by increasing the porosity. Byincreasing the porosity of the structure, the densificationstrain first increases but then decreases.

کلیدواژه ها:

Rhombic dodecahedron ، Micro-structure ، Selective Laser Melting ، Implant