Modeling of variational gradient porous architecture with multi-directional filament deposition in 3D scaffolds

Warning The system is temporarily closed to updates for reporting purpose.

Khoda, AKM Bashirul and Özbolat, İbrahim T. and Koç, Bahattin (2013) Modeling of variational gradient porous architecture with multi-directional filament deposition in 3D scaffolds. Computer-Aided Design & Applications, 10 (3). pp. 445-459. ISSN 1686-4360

[thumbnail of author cannot archive publisher's version/PDF] PDF (author cannot archive publisher's version/PDF)
CADandA_Paper_Koc.pdf
Restricted to Repository staff only

Download (982kB) | Request a copy

Abstract

Porous scaffolds with interconnected and continuous pores have recently been developed to stimulate tissue regeneration. Even though few researches have focused on the internal architecture of porous scaffolds but concluded that properly interconnected and continuous pores with spatial distribution might perform diverse mechanical, biological and chemical functions of a scaffold. Thus the need for reproducible and fabricatable scaffold design with controllable gradient porosity is obvious but is hardly achieved because of design and fabrication limitations. In this paper, a novel functionally gradient variational porosity architecture has been proposed with continuous material deposition planning scheme. The medial axis transformation for the scaffold has been calculated to generate an internal feature of the geometric domain. The medial axis is then used as a base to develop the medial boundary to define the medial regions. Then the complex internal architecture of scaffolds is divided into sub-regions using the ruling lines that are generated between the slice’s contour and the medial boundary. The desired controlled variational porosity along the scaffold architecture has been achieved with the combination of two geometrically oriented consecutive layers while meeting the tissue scaffold design constraints. This ensures truly porous structures in every direction as well as controllable porosity with interconnected pores along the scaffold architecture. The proposed methodology has been implemented and illustrative examples are also provided. A sample designed structure has been fabricated with a NC motion controlled micro-nozzle deposition system.
Item Type: Article
Uncontrolled Keywords: medial axis, variational porosity, internal scaffold architecture
Divisions: Faculty of Engineering and Natural Sciences > Academic programs > Industrial Engineering
Sabancı University Nanotechnology Research and Application Center
Faculty of Engineering and Natural Sciences
Faculty of Engineering and Natural Sciences > Academic programs > Manufacturing Systems Eng.
Depositing User: Bahattin Koç
Date Deposited: 17 Jan 2014 09:56
Last Modified: 26 Apr 2022 09:10
URI: https://research.sabanciuniv.edu/id/eprint/23419

Actions (login required)

View Item
View Item