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Mechanical behavior of calcium sulfate scaffold prototypes built by solid free-form fabrication

Purpose: This paper aims to investigate the mechanical behavior of three-dimensional (3D) calcium sulfate porous structures created by a powder-based 3D printer. The effects of the binder-jetting and powder-spreading orientations on the microstructure of the specimens are studied. A micromechanical...

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Main Authors: Asadi-Eydivand, Mitra, Solati-Hashjin, Mehran, Abu Osman, Noor Azuan
Format: Article
Published: Emerald 2018
Subjects:
R Medicine
Online Access:http://eprints.um.edu.my/22448/
https://doi.org/10.1108/RPJ-06-2015-0077
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spelling my.um.eprints.224482019-09-19T08:11:57Z http://eprints.um.edu.my/22448/ Mechanical behavior of calcium sulfate scaffold prototypes built by solid free-form fabrication Asadi-Eydivand, Mitra Solati-Hashjin, Mehran Abu Osman, Noor Azuan R Medicine Purpose: This paper aims to investigate the mechanical behavior of three-dimensional (3D) calcium sulfate porous structures created by a powder-based 3D printer. The effects of the binder-jetting and powder-spreading orientations on the microstructure of the specimens are studied. A micromechanical finite element model is also examined to predict the properties of the porous structures under the load. Design/methodology/approach: The authors printed cylindrical porous and solid samples based on a predefined designed model to study the mechanical behavior of the prototypes. They investigated the effect of three main build bed orientations (x, y and z) on the mechanical behavior of solid and porous specimens fabricated in each direction then evaluated the micromechanical finite-element model for each direction. The strut fractures were analyzed by scanning electron microscopy, micro-computed tomography and the von Mises stress distribution. Findings: Results showed that the orientation of powder spreading and binder jetting substantially influenced the mechanical behavior of the 3D-printed prototypes. The samples that were fabricated parallel to the applied load had higher compressive strength compared with those printed perpendicular to the load. The results of the finite element analysis agreed with the results of the experimental mechanical testing. Research limitations/implications: The mechanical behavior was studied for the material and the 3D-printing machine used in this research. If one were to use another material formulation or machine, the printing parameters would have to be set accordingly. Practical implications: This work aimed to re-tune the control factors of an existing rapid prototyping process for the given machine. The authors achieved these goals without major changes in the already developed hardware and software architecture. Originality/value: The results can be used as guidelines to set the printing parameters and a model to predict the mechanical properties of 3D-printed objects for the development of patient- and site-specific scaffolds. Emerald 2018 Article PeerReviewed Asadi-Eydivand, Mitra and Solati-Hashjin, Mehran and Abu Osman, Noor Azuan (2018) Mechanical behavior of calcium sulfate scaffold prototypes built by solid free-form fabrication. Rapid Prototyping Journal, 24 (8). pp. 1392-1400. ISSN 1355-2546 https://doi.org/10.1108/RPJ-06-2015-0077 doi:10.1108/RPJ-06-2015-0077
institution Universiti Malaya
building UM Library
collection Institutional Repository
continent Asia
country Malaysia
content_provider Universiti Malaya
content_source UM Research Repository
url_provider http://eprints.um.edu.my/
topic R Medicine
spellingShingle R Medicine
Asadi-Eydivand, Mitra
Solati-Hashjin, Mehran
Abu Osman, Noor Azuan
Mechanical behavior of calcium sulfate scaffold prototypes built by solid free-form fabrication
description Purpose: This paper aims to investigate the mechanical behavior of three-dimensional (3D) calcium sulfate porous structures created by a powder-based 3D printer. The effects of the binder-jetting and powder-spreading orientations on the microstructure of the specimens are studied. A micromechanical finite element model is also examined to predict the properties of the porous structures under the load. Design/methodology/approach: The authors printed cylindrical porous and solid samples based on a predefined designed model to study the mechanical behavior of the prototypes. They investigated the effect of three main build bed orientations (x, y and z) on the mechanical behavior of solid and porous specimens fabricated in each direction then evaluated the micromechanical finite-element model for each direction. The strut fractures were analyzed by scanning electron microscopy, micro-computed tomography and the von Mises stress distribution. Findings: Results showed that the orientation of powder spreading and binder jetting substantially influenced the mechanical behavior of the 3D-printed prototypes. The samples that were fabricated parallel to the applied load had higher compressive strength compared with those printed perpendicular to the load. The results of the finite element analysis agreed with the results of the experimental mechanical testing. Research limitations/implications: The mechanical behavior was studied for the material and the 3D-printing machine used in this research. If one were to use another material formulation or machine, the printing parameters would have to be set accordingly. Practical implications: This work aimed to re-tune the control factors of an existing rapid prototyping process for the given machine. The authors achieved these goals without major changes in the already developed hardware and software architecture. Originality/value: The results can be used as guidelines to set the printing parameters and a model to predict the mechanical properties of 3D-printed objects for the development of patient- and site-specific scaffolds.
format Article
author Asadi-Eydivand, Mitra
Solati-Hashjin, Mehran
Abu Osman, Noor Azuan
author_facet Asadi-Eydivand, Mitra
Solati-Hashjin, Mehran
Abu Osman, Noor Azuan
author_sort Asadi-Eydivand, Mitra
title Mechanical behavior of calcium sulfate scaffold prototypes built by solid free-form fabrication
title_short Mechanical behavior of calcium sulfate scaffold prototypes built by solid free-form fabrication
title_full Mechanical behavior of calcium sulfate scaffold prototypes built by solid free-form fabrication
title_fullStr Mechanical behavior of calcium sulfate scaffold prototypes built by solid free-form fabrication
title_full_unstemmed Mechanical behavior of calcium sulfate scaffold prototypes built by solid free-form fabrication
title_sort mechanical behavior of calcium sulfate scaffold prototypes built by solid free-form fabrication
publisher Emerald
publishDate 2018
url http://eprints.um.edu.my/22448/
https://doi.org/10.1108/RPJ-06-2015-0077
_version_ 1646210244561338368
score 13.211869

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