Premium
Fracture modes under uniaxial compression in hydroxyapatite scaffolds fabricated by robocasting
Author(s) -
Miranda Pedro,
Pajares Antonia,
Saiz Eduardo,
Tomsia Antoni P.,
Guiberteau Fernando
Publication year - 2007
Publication title -
journal of biomedical materials research part a
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.849
H-Index - 150
eISSN - 1552-4965
pISSN - 1549-3296
DOI - 10.1002/jbm.a.31272
Subject(s) - materials science , composite material , fabrication , rod , finite element method , viscoelasticity , fracture (geology) , perpendicular , compression (physics) , structural engineering , medicine , alternative medicine , geometry , mathematics , pathology , engineering
The fracture modes of hydroxyapatite (HA) scaffolds fabricated by direct‐write assembly (robocasting) are analyzed in this work. Concentrated HA inks with suitable viscoelastic properties were developed to enable the fabrication of prototype structures consisting of a 3‐D square mesh of interpenetrating rods. The fracture behavior of these model scaffolds under compressive stresses is determined from in situ uniaxial tests performed in two different directions: perpendicular to the rods and along one of the rod directions. The results are analyzed in terms of the stress field calculated by finite element modeling (FEM). This analysis provides valuable insight into the mechanical behavior of scaffolds for bone tissue engineering applications fabricated by robocasting. © 2007 Wiley Periodicals, Inc. J Biomed Mater Res, 2007